Wind tunnel test and numerical simulation of wind pressure on a high-rise building

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Wind tunnel test and numerical simulation of wind pressure on a high-rise building"

Transcription

1 Journal of Chongqing University (English Edition) [ISSN ] Vol. 9 No. 1 March 2010 Article ID: (2010) To cite this article: AL ZOUBI Feras, LI Zheng-liang, WEI Qi-ke, SUN Yi. Wind tunnel testing and numerical simulation of wind pressure on a high-rise building [J]. J Chongqing Univ: Eng Ed [ISSN ], 2010, 9(1): Wind tunnel test and numerical simulation of wind pressure on a high-rise building AL ZOUBI Feras, LI Zheng-liang, WEI Qi-ke, SUN Yi Department of Civil Engineering, Chongqing University, Chongqing , P. R. China Received 27 September 2009; received in revised form 3 March 2010 Abstract: We carried out a wind tunnel test to measure cladding loads for a high-rise building of 295 m in height, which would be located in the business center of Chongqing Municipality, P. R. China. The rigid model was used to determine fluctuating local pressures on the exterior surfaces of the building. The wind tunnel test results show the critical zone of wind pressures on building surfaces in both standalone and interference conditions. The computational fluid dynamics (CFD) was conducted by using the FLUENT Code to compare with the wind tunnel test results, and the steady three-dimensional turbulent flow with Realizable k-ε as a turbulence model was used. The CFD results are agree with the wind tunnel test results in regards to distributions of wind pressures over a high-rise building s surfaces. Keywords: computational fluid dynamics; wind pressure; high-rise building; wind tunnel test CLC number: TU Document code: A 1 Introduction The design of a tall building and its curtain wall system should consider a function to control the extreme wind induced pressures which would occur within its lifetime. The pressures have a significant impact on the cost of the structure. For a rational design of the cladding, it is important to have a good knowledge of wind induced local pressures that would act on the building [1-2]. Wind tunnel testing is now common practice for design of most tall buildings [3-4]. In many cases, owners of proposed moderately tall buildings are also encouraged to allow for wind tunnel testing, as the costs associated with such testing can be offset by the substantial savings in the building costs, due to the reduced design wind loading [3]. In recent years, computational methods have become more popular because they are less expensive and much Al ZOUBI Feras: Funded by the National Natural Science Foundation of China (No ) faster compared to the field and wind tunnel experiments in most cases and they predict the parameters of interest with reasonable accuracy [5-8]. We carried out two methods of estimating pressures on a high-rise building practically by the wind tunnel test and numerically by the computational fluid dynamics (CFD), and compared their results. 2 Wind tunnel test The proposed Chongqing International Development Financial Building is an office building with shopping center, which is 295 m high of 64 stories and would be located in the commercial area of Chongqing Municipality, P. R. China. It is a high-rise building, which is close to surrounding buildings from all directions. The wind tunnel test was carried out to measure the cladding loads, the overall structural loads, and the wind environment. Fig. 1 shows the view of the building. Static models with a geometric scale of 1 : 300 of the building and surrounding areas were fabricated in the China Aerodynamics Research and Development 47

2 Center, Mianyang, Sichuan Province, P. R. China. The wind tunnel is closed-circuit with a cross section of 3 m high and 4 m wide and a working length of 8 m. Its capacity wind speed is 100 m/s. Fig. 2 shows a photograph of the interference case study in the wind tunnel test. The building model was made of clear perspex. Models of the surrounding buildings (the neighboring buildings and local land topography were in a circular area of radius 500 m from the high-rise building model) were constructed by foam and wooden blocks. The building model was fitted with pressure taps (500 to 590) on the external faces. To obtain a good distribution of pressures, more taps are required in regions of high-pressure gradients, such as corners and the slit opening. These taps will give points of pressure which can then be used to determine the design loads on the cladding. The wind structure modeled in the wind tunnel was based on definitions of a wind structure of category D (center of large city with closely spaced tall buildings) terrain, of the Chinese National Standard Code [1]. The power law exponents of the mean wind speed profile and the turbulence intensity profile are 0.30 and 0.25, respectively. Fig. 3 shows the mean wind speed and longitudinal turbulence of wind model. We tested the model in 16 wind directions at 22.5 increments for a return period of 100 years wind speed (Fig. 4). Fig. 2 Models of the wind tunnel test α : Power-law exponent; I U : Turbulence intensity; Z ref : height at the reference level; Z: height at which wind speed is calculated; U and U ref : mean wind speed at heights of Z and Z ref, respectively Fig. 3 Mean wind speed and turbulence intensity profiles Wind pressure at any point of pressure on the building faces is expressed in the form of a non dimensional pressure coefficient. Mean and root mean square of pressure coefficient at point i ( C pi, mean i, C pi, sd i ) are Fig. 1 View of a high-rise building in the commercial area of Chongqing Municipality, P. R. China C pi, meani and N ( ( Pi P )/ N i= 1 = P P 0, (1) 48 J. Chongqing Univ. Eng. Ed. [ISSN ], 2010, 9(1): 47-53

3 C pi, sdi = N ( Pi P ) ( Cpi, mean ) i P P N 1 i= 1 0 2, (2) where P i is the wind pressure at point i, P 0 is the static reference pressure, P is the hydrostatic test reference point, and N is the total number of samples. Fig. 4 Wind directions and coordinate system The maximum and minimum value of pressure coefficient at point i are C = C + gc, (3a) pi, max i pi, mean i pi, sdi and C = C gc, (3b) pi, min i pi, mean i pi, sdi where the gust factor (g) is 3 [9]. Fig. 5 shows the tunnel test results of mean pressure coefficient distribution on facades of the building for the wind direction of 0.0. The wind tunnel test results show that 1) The positive-mean pressure wind coefficient zone is on the windward face. High values of pressures can be seen on the bottom layers and the center of the middle layers of the windward face. The low values can be noticed close to edges of middle layers and in upper layers. 2) The negative-mean pressures wind coefficients zone is on the leeward face. 3) The negative-mean pressure wind coefficients zone is on the side faces. The largest value of mean pressure coefficients can be seen on edges and corners of side faces, which is mainly adjacent to the windward face due to vortex shedding. They can reach to The low values are distributed on the middle layers. 4) The magnitude of the side wall pressures is higher than that of the leeward wall pressures. 3 Numerical simulation 3.1 Computational domain size The computational domain size depends on two aspects, which are the spatial requirement of fully developed turbulence and the working area. To reduce the requirement of computational resources, in the following study, the inlet and lateral boundaries are 2H (H is the gradient height) away from the nearest building and the outlet boundary is 10H behind the last building. The top boundary is 2H away from the building. H=310 m and one million gird cell were used in the computation of isolated case study. H=600 m and around two million grid cell were used in the computation of interference case study. 3.2 Boundary conditions The inlet boundary conditions are presented as follows z = 10 V( z) V α ( ) ( ), (4) I( z) = 0.15 z/ H = 0.15 z/ 450, (5) k = 3 ( ui z 2 )2, (6) and 3/2 3/4 k μ ε = C, (7) l where V( z ) is the horizontal wind speed at an elevation z; V 10 is the speed at the reference elevation; H = 450 m and the exponent of power law α = 0.3 which are parameters varied with the ground roughness [1]; I( z ) is the turbulence intensity; l is the characteristic length; C μ = 0.09 ; l = 0.07L, in which L is the characteristic size of the building; k is the turbulence kinetic energy; and ε is the turbulent dissipating rate. UDF (userdefined functions) programming was used to simulate in FLUENT 6.2 [10]. J. Chongqing Univ. Eng. Ed. [ISSN ], 2010, 9(1):

4 a Side face Windward face Side face Leeward face 50 J. Chongqing Univ. Eng. Ed. [ISSN ], 2010, 9(1): 47-53

5 b Side face Windward face Side face Leeward face Fig. 5 Values of mean pressure coefficients on facades of the building in a) interference case study, and b) isolated case study J. Chongqing Univ. Eng. Ed. [ISSN ], 2010, 9(1):

6 The boundary conditions of the computational domain volume in the simulation were as follows. The edges and the upper surface of the volume: symmetries; the flow surface of the volume: pressure-outlet; the surfaces of the building models: wall (no-slip) and the smooth surface; the ground surface of the volume: wall (no-slip) and the rough surface; and for simulation the flow near the walls, the non-equilibrium wall function models were adopted. 3.3 Turbulence model of wind flow Wind flow can be regarded as incompressible turbulent flow because the density stratification around the buildings is very weak. The numerical solution of the governing equations, the mass conservation (continuity) equations and the momentum conservation equations (Navier-Stokes), is using a finite volume method, and the discretized equations are solved by means of segregated method. Pressure-velocity coupling uses the SIMPLY algorithm. The solution is based on the second order upwind scheme difference. As the wind flow in the urban area is totally threedimension and complicated, the Realizable k-ε turbulence model is used. Near-wall treatment and nonequilibrium wall function are applied [11]. All the calculations were performed using the commercial CFD code FLUENT 6.2 [12] by high performance computing at the College of Civil Engineering, Chongqing University. Computations were carried out for wind directions at 0.0, 90.0, and for both isolated and interference conditions. Fig. 6 shows the CFD results of wind pressure distribution on facades of the building when the wind direction is 0.0. It can be seen from Fig. 6 that negative pressure zones are on the leeward face, positive pressure zones are on the windward face, and the side faces of the building mostly have negative pressure zones. The CFD results completely agree with the test results in respect to the pressure distribution on the building surfaces, and disagree with the test results in respect to estimating exact values of the pressure. The distribution of maximum positive or negative pressures over the building s surfaces are not agree with the experimental study, which means that CFD in this study is still unable to predict accurate assessment of local pressures on building surfaces. Fig. 7 shows a general view of buildings in the interference CFD study. 4 Conclusions A comparative investigation was carried out on a high-rise building in the commercial area of Chongqing Municipality, P. R. China. The wind tunnel test and numerical simulation with CFD code were carried out. The results show that 1) The wind tunnel test can provide a more accurate assessment of the wind flow around a high-rise building and the resulting pressures, but it is costly and timeconsuming. Fig. 6 Wind pressure/p distributions on facades of the building as the wind direction is 0.0 in a) isolated case study, and b) interference case study 2) The CFD is a powerful tool to provide useful information with details for cladding design against wind pressures. It can be used as an assistant tool for the wind tunnel test study. 3) Using the steady three-dimensional turbulent flow with Realizable k-ε as a turbulence model reasonably agree with the experimental results in respect to distributions of negative and positive pressure on a building s faces. Therefore, it is recommended to use the model to study wind pressure distribution of a highrise building surfaces in the preliminary design. 52 J. Chongqing Univ. Eng. Ed. [ISSN ], 2010, 9(1): 47-53

7 Fig. 7 Wind pressure/p distributions contour as the wind direction is 0.0 in interference case study Acknowledgments We acknowledge the financial support of the National Natural Science Foundation of China (No ). References [1] Simiu E, Scanlan RH. Wind effects on structures: fundamentals and applications to design [M]. 3rd ed. New York: Wiley-Interscience, [2] Holmes JD. Wind loading of structures [M]. 2nd ed. New York and London: Taylor and Francis Group, [3] Mendis P, Ngo T, Haritos N, et al. Wind loading on tall buildings [J]. EJSE: Loading on Structures, 2007 (S1): [4] American Society of Civil Engineers (ASCE). ASCE No. 67 Wind tunnel studies of buildings and structures [S]. Reston, VA: ASCE, [5] Architectural Institute of Japan. AIJ guide for numerical prediction of wind loads on buildings [M]. Tokyo: Architectural Institute of Japan, (In Japanese). [6] Huang SH, Li QS, Xu SL. Numerical evaluation of wind effects on a tall steel building by CFD [J]. Journal of Constructional Steel Research, 2007, 63(5): [7] Tamura T, Nozawa K, Kondo K. AIJ guide for numerical prediction of wind loads on buildings [J]. Journal of Wind Engineering and Industrial Aerodynamics [ISSN ], 2008, 96(10-11): [8] Tominaga Y, Mochida A, Yoshie R, et al. AIJ Guidelines for practical applications of CFD to pedestrian wind environment around buildings [J]. Journal of Wind engineering and Industrial Aerodynamics [ISSN ], 2008, 96(10-11): [9] Davenport AG. Gust loading factors [J]. Journal of the Structural Division, ASCE, 1967, 93(3): [10] China Construction Engineering Press. GB Load code for the design of building structures [S]. China Construction Engineering Press, [11] Li JQ, Ward IC. Developing computational fluid dynamics conditions for urban natural ventilaiton study [C]. In: International Building Performancs Simulation Association Conference and Exhibition, Beijing, September 3-6, Beijing: [s.n.], 2007: [12] Fluent Inc.. FLUENT 6.2 user s guide [EB/OL]. [S.l.]: Fluent Inc [cited ]. ents/manuals/fluent_help/html/ug/main_pre.htm Edited by XUE Jing-yuan J. Chongqing Univ. Eng. Ed. [ISSN ], 2010, 9(1):

a high-rise (78 m) building in the city of Antwerp. CFD simulations are performed for the building with and without second-skin facade concept impleme

a high-rise (78 m) building in the city of Antwerp. CFD simulations are performed for the building with and without second-skin facade concept impleme The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2-6, 2012 CFD analysis of wind comfort on high-rise building balconies: validation and

More information

External Pressure Coefficients on Saw-tooth and Mono-sloped Roofs

External Pressure Coefficients on Saw-tooth and Mono-sloped Roofs External Pressure Coefficients on Saw-tooth and Mono-sloped Roofs Authors: Bo Cui, Ph.D. Candidate, Clemson University, 109 Lowry Hall, Clemson, SC 9634-0911, boc@clemson.edu David O. Prevatt, Assistant

More information

APPLICATION OF COMPUTATIONAL FLUID DYNAMICS (CFD) IN WIND ANALYSIS OF TALL BUILDINGS. Damith Mohotti, Priyan Mendis, Tuan Ngo

APPLICATION OF COMPUTATIONAL FLUID DYNAMICS (CFD) IN WIND ANALYSIS OF TALL BUILDINGS. Damith Mohotti, Priyan Mendis, Tuan Ngo APPLICATION OF COMPUTATIONAL FLUID DYNAMICS (CFD) IN WIND ANALYSIS OF TALL BUILDINGS Damith Mohotti, Priyan Mendis, Tuan Ngo Department of Infrastructures Engineering, The University of Melbourne, Victoria,

More information

Improving pedestrian wind comfort around a high rise building in an urban area: a case study by CFD simulations and on-site measurements

Improving pedestrian wind comfort around a high rise building in an urban area: a case study by CFD simulations and on-site measurements Improving pedestrian wind comfort around a high rise building in an urban area: a case study by CFD simulations and on-site measurements WD Janssen, B Blocken, and T van Hooff Unit Building Physics and

More information

Computational evaluation of pedestrian wind comfort and wind safety around a high-rise building in an urban area

Computational evaluation of pedestrian wind comfort and wind safety around a high-rise building in an urban area International Environmental Modelling and Software Society (iemss) 7th Intl. Congress on Env. Modelling and Software, San Diego, CA, USA, Daniel P. Ames, Nigel W.T. Quinn and Andrea E. Rizzoli (Eds.) http://www.iemss.org/society/index.php/iemss-2014-proceedings

More information

RESEARCH ON THE WIND LOAD PARAMETERS AND THE WIND FENCES BEHAVIOR FOR WIND FENCES OF RAILWAY BRIDGE

RESEARCH ON THE WIND LOAD PARAMETERS AND THE WIND FENCES BEHAVIOR FOR WIND FENCES OF RAILWAY BRIDGE RESEARCH ON THE WIND LOAD PARAMETERS AND THE WIND FENCES BEHAVIOR FOR WIND FENCES OF RAILWAY BRIDGE Shi-xiong Zheng Professor, School of Civil Engineering, Southwest Jiaotong University Chengdu Sichuan

More information

High Swept-back Delta Wing Flow

High Swept-back Delta Wing Flow Advanced Materials Research Submitted: 2014-06-25 ISSN: 1662-8985, Vol. 1016, pp 377-382 Accepted: 2014-06-25 doi:10.4028/www.scientific.net/amr.1016.377 Online: 2014-08-28 2014 Trans Tech Publications,

More information

Available online at ScienceDirect. Procedia Engineering 161 (2016 )

Available online at  ScienceDirect. Procedia Engineering 161 (2016 ) Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 161 (216 ) 1845 1851 World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium 216, WMCAUS 216 Experimental

More information

Numerical simulation of topographic effects on wind flow fields over complex terrain

Numerical simulation of topographic effects on wind flow fields over complex terrain The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 2013, Chennai, India Numerical simulation of topographic effects on wind flow fields over complex terrain B.W. Yan 1, Q.S. LI 2,

More information

Internal pressures in a building with roof opening

Internal pressures in a building with roof opening The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 2013, Chennai, India Internal pressures in a building with roof opening Shouying Li 1,Shouke Li 2, Zhengqing Chen 3. 1 Asociate Professor

More information

Wind tunnel tests of a non-typical stadium roof

Wind tunnel tests of a non-typical stadium roof Wind tunnel tests of a non-typical stadium roof G. Bosak 1, A. Flaga 1, R. Kłaput 1 and Ł. Flaga 1 1 Wind Engineering Laboratory, Cracow University of Technology, 31-864 Cracow, Poland. liwpk@windlab.pl

More information

Centre for Offshore Renewable Energy Engineering, School of Energy, Environment and Agrifood, Cranfield University, Cranfield, MK43 0AL, UK 2

Centre for Offshore Renewable Energy Engineering, School of Energy, Environment and Agrifood, Cranfield University, Cranfield, MK43 0AL, UK 2 Fluid Structure Interaction Modelling of A Novel 10MW Vertical-Axis Wind Turbine Rotor Based on Computational Fluid Dynamics and Finite Element Analysis Lin Wang 1*, Athanasios Kolios 1, Pierre-Luc Delafin

More information

AIRFOIL PROFILE OPTIMIZATION OF AN AIR SUCTION EQUIPMENT WITH AN AIR DUCT

AIRFOIL PROFILE OPTIMIZATION OF AN AIR SUCTION EQUIPMENT WITH AN AIR DUCT THERMAL SCIENCE, Year 2015, Vol. 19, No. 4, pp. 1217-1222 1217 AIRFOIL PROFILE OPTIMIZATION OF AN AIR SUCTION EQUIPMENT WITH AN AIR DUCT by Li QIU a,b, Rui WANG a,*, Xiao-Dong CHEN b, and De-Peng WANG

More information

Determination of the wind pressure distribution on the facade of the triangularly shaped high-rise building structure

Determination of the wind pressure distribution on the facade of the triangularly shaped high-rise building structure Determination of the wind pressure distribution on the facade of the triangularly shaped high-rise building structure Norbert Jendzelovsky 1,*, Roland Antal 1 and Lenka Konecna 1 1 STU in Bratislava, Faculty

More information

Folding Reticulated Shell Structure Wind Pressure Coefficient Prediction Research based on RBF Neural Network

Folding Reticulated Shell Structure Wind Pressure Coefficient Prediction Research based on RBF Neural Network International Conference on Information Sciences, Machinery, Materials and Energy (ICISMME 2015) Folding Reticulated Shell Structure Wind Pressure Coefficient Prediction Research based on RBF Neural Network

More information

average length of the bluff body surface reattachment will decrease with blockage ratio increasing. Cherry's test results showed that 5% of the blocka

average length of the bluff body surface reattachment will decrease with blockage ratio increasing. Cherry's test results showed that 5% of the blocka The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2 6, 2012 Investigation on wind tunnel blockage effect of super high-rise building WANG

More information

URBAN ENERGY AND MICROCLIMATE: WIND TUNNEL EXPERIMENTS AND MULTISCALE MODELING

URBAN ENERGY AND MICROCLIMATE: WIND TUNNEL EXPERIMENTS AND MULTISCALE MODELING URBAN ENERGY AND MICROCLIMATE: WIND TUNNEL EXPERIMENTS AND MULTISCALE MODELING Jan Carmeliet 1,2, Jonas Allegrini 1,2, Peter Moonen 1,2, Saba Saneinejad 1, Viktor Dorer 2 1 ETHZ, Chair of Building Physics,

More information

Available online at ScienceDirect. Procedia Engineering 126 (2015 )

Available online at  ScienceDirect. Procedia Engineering 126 (2015 ) Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 126 (2015 ) 542 548 7th International Conference on Fluid Mechanics, ICFM7 Terrain effects on characteristics of surface wind

More information

AN IMPROVED CROSS VENTILATION MODEL IN WINDY REGIONS

AN IMPROVED CROSS VENTILATION MODEL IN WINDY REGIONS AN IMPROVED CROSS VENTILATION MODEL IN WINDY REGIONS Ahmed A.Rizk, Professor Architectural Engineering Department, Tanta University, Egypt Yasser. A.Al- Samadony, Assistant Professor Mechanical Power Engineering

More information

Wind pressures in canopies with parapets

Wind pressures in canopies with parapets Wind pressures in canopies with parapets A. Poitevin 1, B. Natalini 2, L. A. Godoy 3 1 Research Assistant, Department of Civil Engineering and Surveying, University of Puerto Rico, poite@msn.com 2 Prof.

More information

International Journal of Technical Research and Applications e-issn: , Volume 4, Issue 3 (May-June, 2016), PP.

International Journal of Technical Research and Applications e-issn: ,  Volume 4, Issue 3 (May-June, 2016), PP. DESIGN AND ANALYSIS OF FEED CHECK VALVE AS CONTROL VALVE USING CFD SOFTWARE R.Nikhil M.Tech Student Industrial & Production Engineering National Institute of Engineering Mysuru, Karnataka, India -570008

More information

Air Craft Winglet Design and Performance: Cant Angle Effect

Air Craft Winglet Design and Performance: Cant Angle Effect Journal of Robotics and Mechanical Engineering Research Air Craft Winglet Design and Performance: Cant Angle Effect Eslam Said Abdelghany 1, Essam E Khalil 2*, Osama E Abdellatif 3 and Gamal elhariry 4

More information

3D NUMERICAL MODELLING OF THE CAPACITY FOR A PARTIALLY PRESSURIZED SPILLWAY

3D NUMERICAL MODELLING OF THE CAPACITY FOR A PARTIALLY PRESSURIZED SPILLWAY 3D NUMERICAL MODELLING OF THE CAPACITY FOR A PARTIALLY PRESSURIZED SPILLWAY Samuel Vingerhagen 1 & Nils Reidar B. Olsen 1 1 Department of Hydraulic and Environmental Engineering, The Norwegian Univeristy

More information

Are Advanced Wind Flow Models More Accurate? A Test of Four Models

Are Advanced Wind Flow Models More Accurate? A Test of Four Models Are Advanced Wind Flow Models More Accurate? A Test of Four Models Philippe Beaucage, PhD Senior Research Scientist Michael C. Brower, PhD Chief Technical Officer Brazil Wind Power Conference 2012 Albany

More information

Numerical prediction of air flow within street canyons based on different two-equation k-ε models

Numerical prediction of air flow within street canyons based on different two-equation k-ε models IOP Conference Series: Materials Science and Engineering OPEN ACCESS Numerical prediction of air flow within street canyons based on different two-equation k-ε models To cite this article: Afiq Witri Muhammad

More information

Investigation on Divergent Exit Curvature Effect on Nozzle Pressure Ratio of Supersonic Convergent Divergent Nozzle

Investigation on Divergent Exit Curvature Effect on Nozzle Pressure Ratio of Supersonic Convergent Divergent Nozzle RESEARCH ARTICLE OPEN ACCESS Investigation on Divergent Exit Curvature Effect on Nozzle Pressure Ratio of Supersonic Convergent Divergent Nozzle Shyamshankar.M.B*, Sankar.V** *(Department of Aeronautical

More information

Wind Loads on Low-Rise Building Models with Different Roof Configurations

Wind Loads on Low-Rise Building Models with Different Roof Configurations Wind Loads on Low-Rise Building Models with Different Roof Configurations Deepak Prasad, Tuputa Uliate, and M. Rafiuddin Ahmed School of Engineering and Physics, Faculty of Science and Technology, The

More information

The Aerodynamic Design and Investigation of Loading Distribution of a Mixed Flow Compressor

The Aerodynamic Design and Investigation of Loading Distribution of a Mixed Flow Compressor Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 00 (2014) 000 000 www.elsevier.com/locate/procedia APISAT2014, 2014 Asia-Pacific International Symposium on Aerospace Technology,

More information

HYDROGEN FAST FILLING TO A TYPE IV TANK DEVELOPED FOR MOTORCYCLES

HYDROGEN FAST FILLING TO A TYPE IV TANK DEVELOPED FOR MOTORCYCLES HYDROGEN FAST FILLING TO A TYPE IV TANK DEVELOPED FOR MOTORCYCLES Yamada, E. 1, Hiraki, W. 2, and Muramatsu, H. 3 1 FC-EV Research Division, Japan Automobile Research Institute, 1328-23 Takaheta, Osaka,

More information

Wind resource assessment over a complex terrain covered by forest using CFD simulations of neutral atmospheric boundary layer with OpenFOAM

Wind resource assessment over a complex terrain covered by forest using CFD simulations of neutral atmospheric boundary layer with OpenFOAM Wind resource assessment over a complex terrain covered by forest using CFD simulations of neutral atmospheric boundary layer with OpenFOAM Nikolaos Stergiannis nstergiannis.com nikolaos.stergiannis@vub.ac.be

More information

The Performance-based Wind Environment Analysis in Campus -Taking University of Shanghai for Science and Technology as an Example

The Performance-based Wind Environment Analysis in Campus -Taking University of Shanghai for Science and Technology as an Example Journal of Civil Engineering and Construction 2:2 (2013) The Performance-based Wind Environment Analysis in Campus -Taking University of Shanghai for Science and Technology as an Example Miao Ye 1,a, Li

More information

Validating CFD Simulation Results: Wind flow around a surface mounted cube in a turbulent channel flow

Validating CFD Simulation Results: Wind flow around a surface mounted cube in a turbulent channel flow Validating CFD Simulation Results: Wind flow around a surface mounted cube in a turbulent channel flow ISLAM ABOHELA 1, NEVEEN HAMZA 1, STEVEN DUDEK 1 1 School of Architecture, Planning and Landscape,

More information

leading edge, where the flow is fully separated. Both for the means and peaks, smooth flow leads to the highest values. A good correlation between cav

leading edge, where the flow is fully separated. Both for the means and peaks, smooth flow leads to the highest values. A good correlation between cav The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2-6, 22 Towards a better understanding of pressure equalization Carine van Bentum a,

More information

Blade Design and Performance Analysis of Wind Turbine

Blade Design and Performance Analysis of Wind Turbine International Journal of ChemTech Research CODEN( USA): IJCRGG ISSN : 0974-4290 Vol.5, No.2, pp 1054-1061, April-June 2013 ICGSEE-2013[14 th 16 th March 2013] International Conference on Global Scenario

More information

EFFECT OF CORNER CUTOFFS ON FLOW CHARACTERISTICS AROUND A SQUARE CYLINDER

EFFECT OF CORNER CUTOFFS ON FLOW CHARACTERISTICS AROUND A SQUARE CYLINDER EFFECT OF CORNER CUTOFFS ON FLOW CHARACTERISTICS AROUND A SQUARE CYLINDER Yoichi Yamagishi 1, Shigeo Kimura 1, Makoto Oki 2 and Chisa Hatayama 3 ABSTRACT It is known that for a square cylinder subjected

More information

2-D Dynamic Analysis of a Pressure Relief Valve by CFD

2-D Dynamic Analysis of a Pressure Relief Valve by CFD 2-D Dynamic Analysis of a Pressure Relief Valve by CFD Xue Guan Song,Ji Hoon Jung, Hyeong Seok Lee, Dong Kwan Kim, Young Chul Park* Mechanical Engineering Dong-A University PusanKOREA *parkyc67@dau.ac.kr

More information

APPLICATION OF PUSHOVER ANALYSIS ON EARTHQUAKE RESPONSE PREDICATION OF COMPLEX LARGE-SPAN STEEL STRUCTURES

APPLICATION OF PUSHOVER ANALYSIS ON EARTHQUAKE RESPONSE PREDICATION OF COMPLEX LARGE-SPAN STEEL STRUCTURES APPLICATION OF PUSHOVER ANALYSIS ON EARTHQUAKE RESPONSE PREDICATION OF COMPLEX LARGE-SPAN STEEL STRUCTURES J.R. Qian 1 W.J. Zhang 2 and X.D. Ji 3 1 Professor, 3 Postgraduate Student, Key Laboratory for

More information

FLOW CONSIDERATIONS IN INDUSTRIAL SILENCER DESIGN

FLOW CONSIDERATIONS IN INDUSTRIAL SILENCER DESIGN FLOW CONSIDERATIONS IN INDUSTRIAL SILENCER DESIGN George Feng, Kinetics Noise Control, Inc., 3570 Nashua Drive, Mississauga, Ontario Vadim Akishin, Kinetics Noise Control, Inc., 3570 Nashua Drive, Mississauga,

More information

EXPERIMENTAL AND NUMERICAL STUDY OF A TWO- ELEMENT WING WITH GURNEY FLAP

EXPERIMENTAL AND NUMERICAL STUDY OF A TWO- ELEMENT WING WITH GURNEY FLAP 25 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES EXPERIMENTAL AND NUMERICAL STUDY OF A TWO- ELEMENT WING WITH GURNEY FLAP F.M. Catalano PhD.( catalano@sc.usp.br ) *, G. L. Brand * * Aerodynamic

More information

Natural Ventilation Applications in Hot-humid Climate: A Preliminary Design for the College of Design at NTUST

Natural Ventilation Applications in Hot-humid Climate: A Preliminary Design for the College of Design at NTUST Natural Ventilation Applications in Hot-humid Climate: A Preliminary Design for the College of Design at NTUST Ming-Tse Lin Associated Architect Bio-Architecture Formosana Firm Taipei, Taiwan Hao-Yang

More information

Performance Evaluation of Four-Sided Square Wind Catchers with Different Geometries by Numerical Method

Performance Evaluation of Four-Sided Square Wind Catchers with Different Geometries by Numerical Method Article Performance Evaluation of Four-Sided Square Wind Catchers with Different Geometries by Numerical Method Maryam Hossein Ghadiri 1,a, Nik Lukman Nik Ibrahim 1,b, and Mohd Farid Mohamed 2,c 1, 2 Department

More information

JAR-23 Normal, Utility, Aerobatic, and Commuter Category Aeroplanes \ Issued 11 March 1994 \ Section 1- Requirements \ Subpart C - Structure \ General

JAR-23 Normal, Utility, Aerobatic, and Commuter Category Aeroplanes \ Issued 11 March 1994 \ Section 1- Requirements \ Subpart C - Structure \ General JAR 23.301 Loads \ JAR 23.301 Loads (a) Strength requirements are specified in terms of limit loads (the maximum loads to be expected in service) and ultimate loads (limit loads multiplied by prescribed

More information

NUMERICAL INVESTIGATION ON WATER DISCHARGE CAPABILITY OF SLUICE CAISSON OF TIDAL POWER PLANT

NUMERICAL INVESTIGATION ON WATER DISCHARGE CAPABILITY OF SLUICE CAISSON OF TIDAL POWER PLANT Proceedings of the Sixth International Conference on Asian and Pacific Coasts (APAC ) December 4 6,, Hong Kong, China NUMERICAL INVESTIGATION ON WATER DISCHARGE CAPABILITY OF SLUICE CAISSON OF TIDAL POWER

More information

Application of Computational Fluid Dynamics to Compressor Efficiency Improvement

Application of Computational Fluid Dynamics to Compressor Efficiency Improvement Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 1994 Application of Computational Fluid Dynamics to Compressor Efficiency Improvement J.

More information

New Technologies applied to the design and optimization of tunnel ventilation systems

New Technologies applied to the design and optimization of tunnel ventilation systems New Technologies applied to the design and optimization of tunnel ventilation systems Ing. Justo Suárez Area Manager - ZITRON Dot. Ing. Massimiliano Bringiotti Managing Director - GEOTUNNEL Ing. Ana Belén

More information

Computational fluid dynamics analysis of a mixed flow pump impeller

Computational fluid dynamics analysis of a mixed flow pump impeller MultiCraft International Journal of Engineering, Science and Technology Vol. 2, No. 6, 2010, pp. 200-206 INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND TECHNOLOGY www.ijest-ng.com 2010 MultiCraft Limited.

More information

Available online at ScienceDirect. Procedia Engineering 126 (2015 )

Available online at  ScienceDirect. Procedia Engineering 126 (2015 ) Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 126 (2015 ) 431 435 7th International Conference on Fluid Mechanics, ICFM7 Self-propulsion of a flexible plunging foil near

More information

CFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS

CFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS CFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS T. Gélain, C. Prévost Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Saclay, France Abstract In order to better understand the risks due

More information

EFFECT OF GEOMETRIC DISTORTION ON THE FLOW FIELD AND PERFORMANCE OF AN AXISYMMETRIC SUPERSONIC INTAKE

EFFECT OF GEOMETRIC DISTORTION ON THE FLOW FIELD AND PERFORMANCE OF AN AXISYMMETRIC SUPERSONIC INTAKE Indian J.Sci.Res.() : 909-99, 0 ISSN:50-08(Online) ISSN : 0976-876 (Print) EFFECT OF GEOMETRIC DISTORTION ON THE FLOW FIELD AND PERFORMANCE OF AN AXISYMMETRIC SUPERSONIC INTAKE MOHAMMAD FARAHANI a, ALIREZA

More information

Wind Flow Validation Summary

Wind Flow Validation Summary IBHS Research Center Validation of Wind Capabilities The Insurance Institute for Business & Home Safety (IBHS) Research Center full-scale test facility provides opportunities to simulate natural wind conditions

More information

A computational study on structural barrier to vertical spread of window spill plume along building exterior façade under external wind

A computational study on structural barrier to vertical spread of window spill plume along building exterior façade under external wind 2nd International Conference on Information, Electronics and Computer (ICIEAC 2014 A computational study on structural barrier to vertical spread of window spill plume along building exterior façade under

More information

CFD Modelling of LPG dispersion

CFD Modelling of LPG dispersion CHAM Limited Pioneering CFD Software for Education & Industry CFD Modelling of LPG dispersion Demonstration example The following describes the numerical analysis of the dispersion of gas release from

More information

Numerical Analysis of Wings for UAV based on High-Lift Airfoils

Numerical Analysis of Wings for UAV based on High-Lift Airfoils Numerical Analysis of Wings for UAV based on High-Lift Airfoils Sachin Srivastava Department of Aeronautical Engineering Malla Reddy College of Engineering & Technology, Hyderabad, Telangana, India Swetha

More information

Characteristics of modern soccer balls

Characteristics of modern soccer balls Available online at www.sciencedirect.com Procedia Engineering 34 (01 ) 1 17 9 th Conference of the International Sports Engineering Association (ISEA) Characteristics of modern soccer balls Takeshi Asai

More information

EDEXCEL NATIONALS UNIT 6 MECHANICAL PRINCIPLES and APPLICATIONS. ASSIGNMENT No. 4

EDEXCEL NATIONALS UNIT 6 MECHANICAL PRINCIPLES and APPLICATIONS. ASSIGNMENT No. 4 EDEXCEL NATIONALS UNIT 6 MECHANICAL PRINCIPLES and APPLICATIONS ASSIGNMENT No. 4 NAME: I agree to the assessment as contained in this assignment. I confirm that the work submitted is my own work. Signature

More information

Adjustment of the k-ω SST turbulence model for prediction of airfoil characteristics near stall

Adjustment of the k-ω SST turbulence model for prediction of airfoil characteristics near stall Journal of Physics: Conference Series PAPER OPEN ACCESS Adjustment of the -ω SST turbulence model for prediction of airfoil characteristics near stall To cite this article: A A Matyusheno and A V Garbaru

More information

An Experimental Study on the Performances of Wind Turbines over Complex Terrain

An Experimental Study on the Performances of Wind Turbines over Complex Terrain 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 07-10 January 2013, Grapevine (Dallas/Ft. Worth Region), Texas AIAA 2013-0612 An Experimental Study on the

More information

CFD SIMULATION STUDY OF AIR FLOW AROUND THE AIRFOIL USING THE MAGNUS EFFECT

CFD SIMULATION STUDY OF AIR FLOW AROUND THE AIRFOIL USING THE MAGNUS EFFECT Magnus effect, simulation, air flow Patryk SOKOŁOWSKI *, Jacek CZARNIGOWSKI **, Paweł MAGRYTA *** CFD SIMULATION STUDY OF AIR FLOW AROUND THE AIRFOIL USING THE MAGNUS EFFECT Abstract The article presents

More information

Characteristics of Decompression Tank Internally Pressurized With Water Using OpenFOAM Syamsuri 1, a

Characteristics of Decompression Tank Internally Pressurized With Water Using OpenFOAM Syamsuri 1, a Applied Mechanics and Materials Submitted: 2015-11-26 ISSN: 1662-7482, Vol. 836, pp 3-8 Accepted: 2016-01-27 doi:10.4028/www.scientific.net/amm.836.3 Online: 2016-06-01 2016 Trans Tech Publications, Switzerland

More information

Development of Biomimicry Wind Louver Surface Design

Development of Biomimicry Wind Louver Surface Design International Proceedings of Chemical, Biological and Environmental Engineering, V0l. 93 (2016) DOI: 10.7763/IPCBEE. 2016. V93. 6 Development of Biomimicry Wind Louver Surface Design Jaepil Choi 1, Donghwa

More information

Techniques to achieve wind comfort & wind loads on buildings and appurtenances

Techniques to achieve wind comfort & wind loads on buildings and appurtenances Vipac Engineers & Scientists Techniques to achieve wind comfort & wind loads on buildings and appurtenances including shades, verandahs, hoardings and walls. Mr Ian Jones, Managing Director Dr Seifu Bekele,

More information

Predicting the Suction Gas Superheating in Reciprocating Compressors

Predicting the Suction Gas Superheating in Reciprocating Compressors Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2014 Predicting the Suction Gas Superheating in Reciprocating Compressors Jonatas Ferreira

More information

Steady and moving high-speed train crosswind simulations. Comparison with wind-tunnel tests.

Steady and moving high-speed train crosswind simulations. Comparison with wind-tunnel tests. Steady and moving high-speed train crosswind simulations. Comparison with wind-tunnel tests. Federico Cheli, Daniele Rocchi, Paolo Schito, Gisella Tomasini Dipartimento di Meccanica del Politecnico di

More information

EXPERIMENTAL INVESTIGATION OF LIFT & DRAG PERFORMANCE OF NACA0012 WIND TURBINE AEROFOIL

EXPERIMENTAL INVESTIGATION OF LIFT & DRAG PERFORMANCE OF NACA0012 WIND TURBINE AEROFOIL EXPERIMENTAL INVESTIGATION OF LIFT & DRAG PERFORMANCE OF NACA0012 WIND TURBINE AEROFOIL Mr. Sandesh K. Rasal 1, Mr. Rohan R. Katwate 2 1 PG Student, 2 Assistant Professor, DYPSOEA Ambi Talegaon, Heat Power

More information

NUMERICAL AND EXPERIMENTAL INVESTIGATION OF THE FLOWFIELD IN A BLOWDOWN WIND TUNNEL

NUMERICAL AND EXPERIMENTAL INVESTIGATION OF THE FLOWFIELD IN A BLOWDOWN WIND TUNNEL ICAS 2002 CONGRESS NUERICAL AND EXPERIENTAL INVESTIGATION OF THE FLOWFIELD IN A BLOWDOWN WIND TUNNEL Ali Rebaine, ahmood Khalid, Cabot Broughton and Fred Ellis Institute for Aerospace Research, National

More information

LONGITUDINAL AIR VELOCITY CONTROL IN A ROAD TUNNEL DURING A FIRE EVENT

LONGITUDINAL AIR VELOCITY CONTROL IN A ROAD TUNNEL DURING A FIRE EVENT - 27 - LONGITUDINAL AIR VELOCITY CONTROL IN A ROAD TUNNEL DURING A FIRE EVENT R. Borchiellini, V. Ferro, V. Giaretto Energy Department Politecnico di Torino Italy ABSTRACT Ventilation equipment is used

More information

A new methodology to evaluate the flying shape of a sail

A new methodology to evaluate the flying shape of a sail International conference on Graphics Engineering June 19 th 21 st, 2013 Madrid,Spain INGEGRAF ADM AIP PRIMECA A new methodology to evaluate the flying shape of a sail T. Ingrassia (a), V. Nigrelli (a),

More information

Study on the Shock Formation over Transonic Aerofoil

Study on the Shock Formation over Transonic Aerofoil Advances in Aerospace Science and Applications. ISSN 2277-3223 Volume 3, Number 2 (2013), pp. 113-118 Research India Publications http://www.ripublication.com/aasa.htm Study on the Shock Formation over

More information

This is an author produced version of Determining the optimum spacing and arrangement for commercial wind towers for ventilation performance.

This is an author produced version of Determining the optimum spacing and arrangement for commercial wind towers for ventilation performance. This is an author produced version of Determining the optimum spacing and arrangement for commercial wind towers for ventilation performance. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/81544/

More information

Design process to evaluate potential of wind noise at façade elements

Design process to evaluate potential of wind noise at façade elements Design process to evaluate potential of wind noise at façade elements Dr.Cristina Paduano 1, Dr.Jennifer Keenahan 1, Réamonn Mac Réamoinn 1 1 Arup, 50 Ringsend Road, Dublin 4, Ireland email: cristina.paduano@arup.com,

More information

WIND DATA ANALYSIS AND WIND FLOW SIMULATION OVER LARGE AREAS

WIND DATA ANALYSIS AND WIND FLOW SIMULATION OVER LARGE AREAS Mathematical Modelling in Civil Engineering Vol. 10 No. 1 2014 Doi: 10.2478/mmce 2014 0005 WIND DATA ANALYSIS AND WIND FLOW SIMULATION OVER LARGE AREAS ANGEL TERZIEV- Lecturer, Assoc. Prof., PhD, Technical

More information

Improved computational methods for determining wind pressures and glass thickness in façades

Improved computational methods for determining wind pressures and glass thickness in façades Challenging Glass, Conference on Architectural and Structural Applications of Glass Bos, Louter, Veer (Organizing Committee) www.bk.tudelft.nl/challengingglass Improved computational methods for determining

More information

WIND LOADS / MOORING & FISH TAILING. Arjen Koop, Senior Project Manager Offshore Rogier Eggers, Project Manager Ships

WIND LOADS / MOORING & FISH TAILING. Arjen Koop, Senior Project Manager Offshore Rogier Eggers, Project Manager Ships WIND LOADS / MOORING & FISH TAILING Arjen Koop, Senior Project Manager Offshore Rogier Eggers, Project Manager Ships OVERVIEW Wind Loads Wind shielding Fish tailing? 2 WIND LOADS FOR OFFSHORE MARS TLP

More information

Research Article Effects of Side Ratio on Wind-Induced Pressure Distribution on Rectangular Buildings

Research Article Effects of Side Ratio on Wind-Induced Pressure Distribution on Rectangular Buildings Journal of Structures Volume 213, rticle ID 176739, 12pages http://d.doi.org/15/213/176739 Research rticle Effects of Side Ratio on Wind-Induced Pressure Distribution on Rectangular Buildings J.. min 1

More information

IMAGE-BASED STUDY OF BREAKING AND BROKEN WAVE CHARACTERISTICS IN FRONT OF THE SEAWALL

IMAGE-BASED STUDY OF BREAKING AND BROKEN WAVE CHARACTERISTICS IN FRONT OF THE SEAWALL IMAGE-BASED STUDY OF BREAKING AND BROKEN WAVE CHARACTERISTICS IN FRONT OF THE SEAWALL Weijie Liu 1 and Yoshimitsu Tajima 1 This study aims to study the breaking and broken wave characteristics in front

More information

WAVE LOAD ACTING ON HORIZONTAL PLATE DUE TO BORE

WAVE LOAD ACTING ON HORIZONTAL PLATE DUE TO BORE Proceedings of the 6 th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science (Coastlab16) Ottawa, Canada, May 10-13, 2016 Copyright : Creative Commons

More information

Available online at Procedia Engineering 200 (2010) (2009) In situ drag measurements of sports balls

Available online at  Procedia Engineering 200 (2010) (2009) In situ drag measurements of sports balls Available online at www.sciencedirect.com Procedia Engineering 200 (2010) (2009) 2437 2442 000 000 Procedia Engineering www.elsevier.com/locate/procedia 8 th Conference of the International Sports Engineering

More information

SAFETY DEMONSTRATION TESTS ON HTR-10

SAFETY DEMONSTRATION TESTS ON HTR-10 2nd International Topical Meeting on HIGH TEMPERATURE REACTOR TECHNOLOGY Beijing, CHINA,, September 22-24, 24 #Paper H6 SAFETY DEMONSTRATION TESTS ON HTR-1 Shouyin HU, Ruipian WANG, Zuying GAO Institute

More information

EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF THE EFFECT OF BODY KIT USED WITH SALOON CARS IN BRUNEI DARUSSALAM

EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF THE EFFECT OF BODY KIT USED WITH SALOON CARS IN BRUNEI DARUSSALAM EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF THE EFFECT OF BODY KIT USED WITH SALOON CARS IN BRUNEI DARUSSALAM M.G., Yazdani, H. Ullah, T. Aderis and R. Zainulariffin, Faculty of Engineering, Institut

More information

Florida Institute of Technology 150 W. University Blvd. Melbourne, Florida (321)

Florida Institute of Technology 150 W. University Blvd. Melbourne, Florida (321) WIND EFFECTS ON EMERGENCY VEHICLES Final Report submitted to: Daniel H. Rocque, Fire Chief SATELLITE BEACH FIRE DEPARTMENT & David Halstead, Senior Management Analyst I DIVISION OF EMERGENCY MANAGEMENT

More information

Influence of Ventilation Tube Rupture from Fires on Gas Distribution in Tunnel

Influence of Ventilation Tube Rupture from Fires on Gas Distribution in Tunnel Available online at www.sciencedirect.com Procedia Engineering 26 (211) 144 1446 First International Symposium on Mine Safety Science and Engineering Influence of Ventilation Tube Rupture from Fires on

More information

The Collapse Analysis of A Transmission Tower Under Wind Excitation

The Collapse Analysis of A Transmission Tower Under Wind Excitation Send Orders for Reprints to reprints@benthamscience.net The Open Civil Engineering Journal, 2014, 8, 136-142 136 Open Access The Collapse Analysis of A Transmission Tower Under Wind Excitation Li Tian

More information

International Journal of Advanced Engineering Technology E-ISSN

International Journal of Advanced Engineering Technology E-ISSN Research Article PERFORMANCE OF ELEVATED WATER TANKS SUJECTED TO WIND FORCES Dr. Hirde Suchita K. 1, ajare Asmita A. 2, Hedaoo Manoj N. 3 Address for Correspondence 1 Professor in Applied Mechanics, Govt.

More information

Available online at ScienceDirect. Procedia Engineering 84 (2014 )

Available online at  ScienceDirect. Procedia Engineering 84 (2014 ) Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 84 (014 ) 97 93 014 ISSST, 014 International Symposium on Safety Science and Technology Research of emergency venting time in

More information

Gust-front factor: A new framework for the analysis of wind load effects in gust-fronts

Gust-front factor: A new framework for the analysis of wind load effects in gust-fronts Gust-front factor: A new framework for the analysis of wind load effects in gust-fronts Dae Kun Kwon a, Ahsan Kareem a a NatHa Modeling Laboratory, University of Notre Dame, USA ABSTRACT: In comparison

More information

Wind Adaptive Building Envelope

Wind Adaptive Building Envelope Wind Adaptive Building Envelope For Reducing Wind Effect on High-rise Puttakhun Vongsingha 4314395 P2 Report 23/01/2015 ii Wind Adaptive Building Envelope For Reducing Wind Effect on High-rise Table of

More information

Aerodynamically Efficient Wind Turbine Blade S Arunvinthan 1, Niladri Shekhar Das 2, E Giriprasad 3 (Avionics, AISST- Amity University, India)

Aerodynamically Efficient Wind Turbine Blade S Arunvinthan 1, Niladri Shekhar Das 2, E Giriprasad 3 (Avionics, AISST- Amity University, India) International Journal of Engineering Science Invention ISSN (Online): 2319 6734, ISSN (Print): 2319 6726 Volume 3 Issue 4ǁ April 2014ǁ PP.49-54 Aerodynamically Efficient Wind Turbine Blade S Arunvinthan

More information

Preliminary Analysis of Drag Reduction for The Boeing

Preliminary Analysis of Drag Reduction for The Boeing Preliminary Analysis of Drag Reduction for The Boeing 747-400 By: Chuck Dixon, Chief Scientist, Vortex Control Technologies LLC 07. 31. 2012 Potential for Airflow Separation That Can Be Reduced By Vortex

More information

ON THE EFFECT OF LIFT FORCES IN BUBBLE PLUMES

ON THE EFFECT OF LIFT FORCES IN BUBBLE PLUMES Ninth International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 10-12 December 2012 ON THE EFFECT OF LIFT FORCES IN BUBBLE PLUMES Jan Erik OLSEN* and Mihaela POPESCU

More information

WAKE MODELING OF AN OFFSHORE WINDFARM USING OPENFOAM

WAKE MODELING OF AN OFFSHORE WINDFARM USING OPENFOAM WAKE MODELING OF AN OFFSHORE WINDFARM USING OPENFOAM Alireza Javaheri, Beatriz Canadillas UL International GmbH (DEWI), Ebertstr. 96, 26382 Wilhelmshaven, Germany Summery The premier task of this work

More information

Numerical investigation on the cavitating flow in Annular Jet Pump under different flow rate ratio

Numerical investigation on the cavitating flow in Annular Jet Pump under different flow rate ratio IOP Conference Series: Earth and Environmental Science OPEN ACCESS Numerical investigation on the cavitating flow in Annular Jet Pump under different flow rate ratio To cite this article: L Z Xiao et al

More information

Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models

Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models Downloaded from orbit.dtu.dk on: Dec 17, 2017 Complex terrain wind resource estimation with the wind-atlas method: Prediction errors using linearized and nonlinear CFD micro-scale models Troen, Ib; Bechmann,

More information

Numerical Simulation of Instability of Geothermal Production Well

Numerical Simulation of Instability of Geothermal Production Well GRC Transactions, Vol. 37, 2013 Numerical Simulation of Instability of Geothermal Production Well Ryuichi Itoi 1, Yasunari Katayama 3, Toshiaki Tanaka 1, Naoto Kumagai 2, and Takaichi Iwasaki 3 1 Department

More information

Structural Improvement Analysis of Working Rail Mounted Cranes under Wind Loads. *Hui Jin 1), Da Chen 2)

Structural Improvement Analysis of Working Rail Mounted Cranes under Wind Loads. *Hui Jin 1), Da Chen 2) Structural Improvement Analysis of Working Rail Mounted Cranes under Wind Loads *Hui Jin 1), Da Chen 2) 1), 2) Jiangsu Key Laboratory of Engineering Mechanics & Key Laboratory of Concrete and Prestressed

More information

INTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 2, No 3, 2012

INTERNATIONAL JOURNAL OF CIVIL AND STRUCTURAL ENGINEERING Volume 2, No 3, 2012 NTERNATONAL JOURNAL OF CVL AND STRUCTURAL ENGNEERNG Volume 2, No 3, 2012 Copyright 2010 All rights reserved ntegrated Publishing services Research article SSN 0976 4399 Analysis of tall building for across

More information

Wind loads investigations of HAWT with wind tunnel tests and site measurements

Wind loads investigations of HAWT with wind tunnel tests and site measurements loads investigations of HAWT with wind tunnel tests and site measurements Shigeto HIRAI, Senior Researcher, Nagasaki R&D Center, Technical Headquarters, MITSUBISHI HEAVY INDSUTRIES, LTD, Fukahori, Nagasaki,

More information

Next Generation Modeling for Deep Water Wave Breaking and Langmuir Circulation

Next Generation Modeling for Deep Water Wave Breaking and Langmuir Circulation Next Generation Modeling for Deep Water Wave Breaking and Langmuir Circulation Eric D. Skyllingstad College of Oceanic and Atmospheric Sciences, Oregon State University Corvallis, OR 97331, Phone: (541)

More information

The Use of Wind Tunnel Measurements in Building Design

The Use of Wind Tunnel Measurements in Building Design 13 The Use of Wind Tunnel Measurements in Building Design Dat Duthinh and Emil Simiu National Institute of Standards and Technology, Gaithersburg, Maryland, United States of America 1. Introduction The

More information

Optimization of Ejector's Performance With a CFD Analysis. Amanda Mattos Karolline Ropelato Ricardo Medronho

Optimization of Ejector's Performance With a CFD Analysis. Amanda Mattos Karolline Ropelato Ricardo Medronho Optimization of Ejector's Performance With a CFD Analysis Amanda Mattos Karolline Ropelato Ricardo Medronho 2 Introduction Ejectors Equipment industrially used and based on the Venturi phenomena; With

More information

Welke daalhouding is het meest aerodynamisch?

Welke daalhouding is het meest aerodynamisch? Welke daalhouding is het meest aerodynamisch? Bert Blocken a,b a Faculteit Bouwkunde, Technische Universiteit Eindhoven, Nederland b Departement Burgerlijke Bouwkunde, KU Leuven, België Welke daalhouding

More information