Wind Tunnel Study on Spanwise Correlation of Aerodynamic Forces on a 5:1 Rectangular Cylinder
|
|
- Robyn Logan
- 5 years ago
- Views:
Transcription
1 The Eighth Asia-Pacific Conference on Wind Engineering, December 10 1, 2013, Chennai, India Wind Tunnel Study on Spanwise Correlation of Aerodynamic Forces on a 5:1 Rectangular Cylinder Xiaobing Liu 1, Yan Cui 2, Qingkuan Liu 3. 1 Lecturer, Shijiazhuang Tiedao University, Shijiazhuang, Hebei, China, x_b_liu@126.com 2 Post graduate student, Shijiazhuang Tiedao University, Shijiazhuang, Hebei, China, @qq.com 3 Professor, Shijiazhuang Tiedao University, Shijiazhuang, Hebei, China, lqk@stdu.edu.cn ABSTRACT Spanwise correlation of aerodynamic forces on a 5:1 rectangular cylinder were investigated through wind tunnel test in smooth flow at wind attacking angle of. The test results show that decay of spanwise correlation coefficient is slower for lift than for drag. Spanwise correlation coefficient of tap pressure on upper side of cylinder decay in a various degree. When Δ/D (Δ is space along coming wind, D is height of rectangular cylinder) around 0. or 3.75, the decay is slow. When Δ/D is around 2 or.95, the decay is rapid. Keywords: Spanwise correlation, Aerodynamic forces, Rectangular cylinder, Wind tunnel test Introduction It is known that when the vortex-shedding frequency is close to the natural frequency of the body, it can cause vortex- induced resonance. Although vortex-induced vibration (VIV) is a kind of limited amplitude vibration and does not directly cause the collapse of a bridge, it can result in large displacements and discomfort to the drivers. In addition, VIVs commonly occur at low wind speeds, so the occurrence probability of VIV is high, resulting in long-term fatigue damage. At present, most of theoretical model study on VIV assumes that flow around bridge deck is two dimensional, the spanwise correlation of aerodynamic forces on bridge deck is ignored. This may be one reason why VIV amplitude gotten from wind tunnel does not agree well with VIV amplitude gotten from theoretical calculation. As a typical bluff body, the flow characteristics of rectangular cylinder has been investigated by many researchers[1-5]. Among these research, more attention was paid to flow bulk parameters (e.g. aerodynamic force coefficients per unit length or Strouhal number) or sectional distribution of pressure statistics (e.g. mean value and standard deviation). Less attention was paid to spanwise correlation of aerodynamic forces on rectangular cylinder. In present paper, wind tunnel test was performed to study spanwise correlation of aerodynamic forces on a stationary 5:1 rectangular cylinder. This work has made first step for study spanwise correlation of aerodynamic forces on rectangular cylinder in voetex-induced vibration. Wind Tunnel Test Wind tunnel test was conducted in high-speed test section of STU-1 boundary layer wind tunnel. The section is 5 meters long, 2.2meters wide and 2 meters high. The test model which is made of organic glass is 2 meters long with a cross section of 0.3m 0.06m(B D). The model was instrumented with 80 pressure taps arranged in eight arrays of 60 (23 on each side face and 7 on the windward and leeward faces) as shown in Fig. 2 and Fig. 3. The arrays Proc. of the 8th Asia-Pacific Conference on Wind Engineering Nagesh R. Iyer, Prem Krishna, S. Selvi Rajan and P. Harikrishna (eds) Copyright c 2013 APCWE-VIII. All rights reserved. Published by Research Publishing, Singapore. ISBN: doi: /
2 are located at following distance from central section: array#1: -80 cm; array#2: -0 cm; array#3: -20 cm; array#: -5 cm; array#5: centralsection; array#6: +10cm, array#7: +30cm; array#8: +80cm. This allows evaluating the spanwise correlation of aerodynamic pressure for different spanwise space. The test model is stationary. The wind speed is 10m/s. The coming flow is uniform flow and turbulence intensity is about 0.5%. The wind attacking angle is from to 1, changing step is 1. Fig.1 Photo of test model Fig.2 Pressure tap location in plan view Fig.3 Pressure tap location in cross section Aerodynamic Coefficient and Strouhal Number Mean and standard-deviation values of pressure coefficient in the middle span section for upper and lower side of model at wind attacking angle are shown in Figure and Figure 5. It can be seen that the mean and standard-deviation values of pressure coefficient for upper side agree well with those for lower side. In Table 1, Reynolds number, drag coefficient 212
3 and Strouhal number gotten from present paper are compared with those gotten from other paper. It can be seen that test results in present paper are in good agreement with those in other paper. This shows that the test data in present paper is correct. upper side lower side upper side lower side , mean u s D, r ms s /D s/d Fig. Mean value of pressure coefficient in the middle span section for upper and lower side of modelat wind attacking angle Fig.5 Standard-deviation value of pressure coefficient in the middle span section for upper and lower side of model at wind attacking angle Table 1 Comparision of test results in present paper and in other paper Reynolds number Drag coefficient Strouhal number present test Schewe test Figure 6 shows aerodynamic coefficients of cylinder at different wind attacking angle. It can be seen that the drag coefficient is increasing with increase of wind attacking angle. The lift coefficient gets to maximum value 0.57 at wind attacking angle. Figure 6 shows Strouhal number of cylinder at different wind attacking angle. It can be found that when wind attacking angle is between and, the Strouhal number is around When wind attacking angle is between and 1, the Strouhal number becomes small with increase of wind attacking angle aerodynami c coef f i ci ent Cd Cl Cm St wi nd at t acki ng angl e( ) wi nd at t acki ng angl e( ) Fig.6 Aerodynamic coefficients at different wind attacking angle Fig.7 Strouhal number at different wind attacking angle 213
4 Pressure Coefficient Figure 8 shows pressure coefficients of cylinder surface at different wind attacking angle. From Figure 8(a), it can be found that for windward side of cylinder, the pressure coefficient of lower half part becomes big with increase of wind attacking angle, while the pressure coefficient of upper half part becomes small with increase of wind attacking angle. From Figure 8(b), it can be found that pressure coefficient of leeward side of cylinder becomes small with increase of wind attacking angle. It can be found from Figure 8(c) that with increase of wind attacking angle, the maximum pressure coefficient of upper side of cylinder becomes small. It can be seen from Figure 8(d) that with increase of wind attacking angle, the maximum pressure coefficient of lower side of cylinder changes little, while the position corresponding to the maximum pressure coefficient changes significantly h/b h/b (a) windward side (b) leeward side s/b (c) upper side s/b (d) lower side Fig.8 Pressure coefficients of cylinder surface at different wind attacking angle 21
5 Spanwise Correlation of Aerodynamic Forces The Spanwise correlation coefficient of aerodynamic forces at wind attacking angle are shown in Figure 9, where δ represents spanwise space. It can be found that spanwise correlation coefficients of drag, lift and torque become small with increase of spanwise space. For the same spanwise space, spanwise correlation coefficient of drag is smallest and spanwise correlation coefficient of lift is biggest. In other words, the decay of spanwise correlation coefficient is slower for lift than for drag correl at i on coef f i ci ent dr ag lift torque /D Fig.9 Spanwise correlation coefficient of aerodynamic forces at wind attacking angle /D /D Fig.10 Spanwise correlation coefficient of tap pressure for upper side of the model at wind attacking angle 215
6 correl at i on coef f i ci ent /D Fig.11 Spanwise correlation coefficient of tap pressure for different Δ/D and same spanwise space δ/d=18.33 Figure 10 shows spanwise correlation coefficient of tap pressure for upper side of the model at wind attacking angle. Figure 11 shows spanwise correlation coefficient of tap pressure for different upper side location(different Δ/D) and same spanwise space δ/d= In these two figures, δ represents spanwise space and Δ represents space along coming wind. It can be found from these two figures that spanwise correlation coefficient of tap pressure become small with increase of spanwise space, however, for different Δ/D, the spanwise correlation coefficient of tap pressure differs from each other even for the same spanwise space δ/d. In other words, spanwise correlation coefficient of tap pressure decay in a various degree. When Δ/D is around 0. or 3.75, the decay is slow. When Δ/D is around 2 or.95, the decay is rapid. Conclusions Spanwise correlation of aerodynamic forces on a 5:1 rectangular cylinder were investigated through wind tunnel test in smooth flow at wind attacking angle of. The test results show that decay of spanwise correlation coefficient is slower for lift than for drag. Spanwise correlation coefficient of tap pressure on upper side of cylinder decay in a various degree. When Δ/D (Δ is space along coming wind, D is height of rectangular cylinder) around 0. or 3.75, the decay is slow. When Δ/D is around 2 or.95, the decay is rapid. References A.J. Bronkhorst. Unsteady pressure measurements on a 5:1 rectangular cylinder[c]. // Proceedings of the 13th International Conference on Wind Engineering. Amsterdam, Holland, 2011, Gianni Bartoli. Wind tunnel study on the aerodynamics of a 5:1 rectangular cylinder in smooth flow[c]. //Proceedings of the 13th International Conference on Wind Engineering. Amsterdam, Holland, 2011, Ricciardelli. Sectional aerodynamic forces and their longitudinal correlation on a vibrating 5:1 rectangular cylinder[c]. //Proceedings of the 6th International Colloquium on Bluff Bodies, Milano, Italy:
7 Schewe G. Reynolds-Number-Effects in flow around a rectangular cylinder with aspect ratio 1:5[C]. //Proceedings of the 5th European and African Conference on Wind Engineering. Florence, Italy, 2009, Dimet. Effects of the vibration regime on the spanwise correlation of the aerodynamic force on a 5:1 rectangular cylinder [J]. Wind Eng. Ind. Aerodyn. 2010(98):
Field Measurement for Aerodynamic Mitigation of Wind Pressure on Gable-roofed Low-rise Building
The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 2013, Chennai, India Field Measurement for Aerodynamic Mitigation of Wind Pressure on Gable-roofed Low-rise Building Peng Huang 1,
More informationInternal 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 informationAerodynamic Measures for the Vortex-induced Vibration of π-shape Composite Girder in Cable-stayed Bridge
Aerodynamic Measures for the Vortex-induced Vibration of π-shape Composite Girder in Cable-stayed Bridge *Feng Wang 1), Jialing Song 2), Tuo Wu 3), and Muxiong Wei 4) 1), 2, 3), 4) Highway School, Chang
More informationThe Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2-6, 2012 Wind tunnel measurements
The Seventh International Colloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, China; September 2-6, 2012 Wind tunnel measurements of aeroelastic guyed mast models a, Tomasz Lipecki
More informationWIND FLOW CHARACTERISTICS AROUND ROOFTOP SOLAR ARRAY - A NUMERICAL STUDY
The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 2013, Chennai, India WIND FLOW CHARACTERISTICS AROUND ROOFTOP SOLAR ARRAY - A NUMERICAL STUDY D.Ghosh 1, A. K. Mittal 2, S. Behera
More informationPRESSURE FLUCTUATIONS ACTING ON A TAPERED TALL BUILDING
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 29, Taipei, Taiwan PRESSURE FLUCTUATIONS ACTING ON A TAPERED TALL BUILDING Young-Moon Kim 1, Ki-Pyo You 1, Jang-Youl You 2 and Chang-Hyun
More informationPressure coefficient on flat roofs of rectangular buildings
Pressure coefficient on flat roofs of rectangular buildings T. Lipecki 1 1 Faculty of Civil Engineering and Architecture, Lublin University of Technology, Poland. t.lipecki@pollub.pl Abstract The paper
More informationWind Tunnel Study Of Wind Pressure Distribution On Xi an s Tallest Building And The Finite Element Calculation And Analysis
The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 2013, Chennai, India Wind Tunnel Study Of Wind Pressure Distribution On Xi an s Tallest Building And The Finite Element Calculation
More informationSPECTRAL CHARACTERISTICS OF FLUCTUATING WIND LOADS ON A SEPARATE TWIN-BOX DECK WITH CENTRAL SLOT
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-, 009, Taipei, Taiwan SPECTRAL CHARACTERISTICS OF FLUCTUATING WIND LOADS ON A SEPARATE TWIN-BOX DEC WITH CENTRAL SLOT Le-Dong Zhu, Shui-Bing
More informationQuantification of the Effects of Turbulence in Wind on the Flutter Stability of Suspension Bridges
Quantification of the Effects of Turbulence in Wind on the Flutter Stability of Suspension Bridges T. Abbas 1 and G. Morgenthal 2 1 PhD candidate, Graduate College 1462, Department of Civil Engineering,
More informationEFFECT 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 informationExperimental Investigation Of Flow Past A Rough Surfaced Cylinder
(AET- 29th March 214) RESEARCH ARTICLE OPEN ACCESS Experimental Investigation Of Flow Past A Rough Surfaced Cylinder Monalisa Mallick 1, A. Kumar 2 1 (Department of Civil Engineering, National Institute
More informationTHREE DIMENSIONAL STRUCTURES OF FLOW BEHIND A
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 29, Taipei, Taiwan THREE DIMENSIONAL STRUCTURES OF FLOW BEHIND A SQUARE PRISM Hiromasa Kawai 1, Yasuo Okuda 2 and Masamiki Ohashi
More informationInvestigations on the Aerodynamic Forces of 2-D Square Lattice Tower Section Using CFD
J. Energy Power Sources Vol. 1, No. 5, 2014, pp. 270-277 Received: August 14, 2014, Published: November 30, 2014 Journal of Energy and Power Sources www.ethanpublishing.com Investigations on the Aerodynamic
More informationInfluence of rounding corners on unsteady flow and heat transfer around a square cylinder
Influence of rounding corners on unsteady flow and heat transfer around a square cylinder S. K. Singh Deptt. of Mech. Engg., M. B. M. Engg. College / J. N. V. University, Jodhpur, Rajasthan, India Abstract
More informationMEASUREMENTS ON THE SURFACE WIND PRESSURE CHARACTERISTICS OF TWO SQUARE BUILDINGS UNDER DIFFERENT WIND ATTACK ANGLES AND BUILDING GAPS
BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano, Italy, July, 2-24 28 MEASUREMENTS ON THE SURFACE WIND PRESSURE CHARACTERISTICS OF TWO SQUARE BUILDINGS UNDER DIFFERENT
More informationAE Dept., KFUPM. Dr. Abdullah M. Al-Garni. Fuel Economy. Emissions Maximum Speed Acceleration Directional Stability Stability.
Aerodynamics: Introduction Aerodynamics deals with the motion of objects in air. These objects can be airplanes, missiles or road vehicles. The Table below summarizes the aspects of vehicle performance
More informationJournal of Engineering Science and Technology Review 6 (3) (2013) Research Article
Jestr Journal of Engineering Science and Technology Review 6 (3) (013) 105-110 Research Article JOURNAL OF Engineering Science and Technology Review www.jestr.org Lift and Drag on Cylinder of Octagonal
More informationGeometry Modification For Minimizing The Aeroelastics Effect
Geometry Modification For Minimizing The Aeroelastics Effect Fariduzzaman a, Subagyo a, Fadilah Hasim a and Matza Gusto Andika a a Aero-Gas dynamics and Vibration Laboratory (LAGG), BPPT, PUSPIPTEK, Serpong
More informationJournal of Engineering Science and Technology Review 9 (5) (2016) Research Article. CFD Simulations of Flow Around Octagonal Shaped Structures
Jestr Journal of Engineering Science and Technology Review 9 (5) (2016) 72-76 Research Article JOURNAL OF Engineering Science and Technology Review www.jestr.org CFD Simulations of Flow Around Octagonal
More informationNumerical and Experimental Investigations of Lift and Drag Performances of NACA 0015 Wind Turbine Airfoil
International Journal of Materials, Mechanics and Manufacturing, Vol. 3, No., February 2 Numerical and Experimental Investigations of Lift and Drag Performances of NACA Wind Turbine Airfoil İzzet Şahin
More informationEFFECTS OF SIDEWALL OPENINGS ON THE WIND LOADS ON PIPE-FRAMED GREENHOUSES
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 29, Taipei, Taiwan EFFECTS OF SIDEWALL OPENINGS ON THE WIND LOADS ON PIPE-FRAMED GREENHOUSES Yasushi Uematsu 1, Koichi Nakahara 2,
More informationWind 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 informationWIND PROFILE MODELLING USING STATISTICAL ANALYSIS OF WEIBULL DISTRIBUTION: AN INDIAN PERSPECTIVE
The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 2013, Chennai, India WIND PROFILE MODELLING USING STATISTICAL ANALYSIS OF WEIBULL DISTRIBUTION: AN INDIAN PERSPECTIVE Vineeth Vijayaraghavan
More informationPRESSURE DISTRIBUTION OF SMALL WIND TURBINE BLADE WITH WINGLETS ON ROTATING CONDITION USING WIND TUNNEL
International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) ISSN 2249-6890 Vol.2, Issue 2 June 2012 1-10 TJPRC Pvt. Ltd., PRESSURE DISTRIBUTION OF SMALL WIND TURBINE
More informationHigh 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 informationCOMPUTATIONAL FLUID DYNAMICS (CFD) INVESTIGATION TO ASSESS WIND EFFECTS ON A TALL STRUCTURES (WIND FORCE PARAMETERS)
COMPUTATIONAL FLUID DYNAMICS (CFD) INVESTIGATION TO ASSESS WIND EFFECTS ON A TALL STRUCTURES (WIND FORCE PARAMETERS) G Naga Sulochana 1, H Sarath kumar 2 1M.Tech Student. 2 Assistant Professor 1,2Department
More informationTHE BRIDGE COLLAPSED IN NOVEMBER 1940 AFTER 4 MONTHS OF ITS OPENING TO TRAFFIC!
OUTLINE TACOMA NARROWS BRIDGE FLOW REGIME PAST A CYLINDER VORTEX SHEDDING MODES OF VORTEX SHEDDING PARALLEL & OBLIQUE FLOW PAST A SPHERE AND A CUBE SUMMARY TACOMA NARROWS BRIDGE, USA THE BRIDGE COLLAPSED
More informationEXPERIMENTAL INVESTIGATION OF WAKE SURVEY OVER A CYLINDER WITH DIFFERENT SURFACE PROFILES
EXPERIMENTAL INVESTIGATION OF WAKE SURVEY OVER A CYLINDER WITH DIFFERENT SURFACE PROFILES Abdul Ahad Khan 1, Abhishek M. B 2, Tresa Harsha P George 3 1 Under Graduate student, Department of Aeronautical
More informationAerodynamic Performance of Trains with Different Longitudinal Section Lines under Crosswind
2017 2nd International Conference on Industrial Aerodynamics (ICIA 2017) ISBN: 978-1-60595-481-3 Aerodynamic Performance of Trains with Different Longitudinal Section Lines under Crosswind Taizhong Xie
More informationDYAMIC BEHAVIOR OF VORTEX SHEDDING FROM AN OSCILLATING THREE-DIMENSIONAL AIRFOIL
27 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES DYAMIC BEHAVIOR OF VORTEX SHEDDING FROM AN OSCILLATING THREE-DIMENSIONAL AIRFOIL Hiroaki Hasegawa*, Kennichi Nakagawa** *Department of Mechanical
More informationaverage 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 informationAerodynamic Analysis of Blended Winglet for Low Speed Aircraft
, July 1-3, 2015, London, U.K. Aerodynamic Analysis of Blended Winglet for Low Speed Aircraft Pooja Pragati, Sudarsan Baskar Abstract This paper provides a practical design of a new concept of massive
More informationA comparison of NACA 0012 and NACA 0021 self-noise at low Reynolds number
A comparison of NACA 12 and NACA 21 self-noise at low Reynolds number A. Laratro, M. Arjomandi, B. Cazzolato, R. Kelso Abstract The self-noise of NACA 12 and NACA 21 airfoils are recorded at a Reynolds
More informationEXPERIMENTAL STUDY OF WIND PRESSURES ON IRREGULAR- PLAN SHAPE BUILDINGS
BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano, Italy, July, 2-24 8 EXPERIMENTAL STUDY OF WIND PRESSURES ON IRREGULAR- PLAN SHAPE BUILDINGS J. A. Amin and A. K. Ahuja
More informationPressure distribution of rotating small wind turbine blades with winglet using wind tunnel
Journal of Scientific SARAVANAN & Industrial et al: Research PRESSURE DISTRIBUTION OF SMALL WIND TURBINE BLADES WITH WINGLET Vol. 71, June 01, pp. 45-49 45 Pressure distribution of rotating small wind
More informationleading 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 informationAn experimental study on a suction flow control method to reduce the unsteadiness of the wind loads acting on a circular cylinder
Exp Fluids (24) 55:77 DOI.7/s348-4-77-7 RESEARCH ARTICLE An experimental study on a suction flow control method to reduce the unsteadiness of the wind loads acting on a circular cylinder Wen-Li Chen Hui
More informationTHE COLLEGE OF AERONAUTICS CRANFIELD
THE COLLEGE OF AERONAUTICS CRANFIELD AERODYNAMIC CHARACTERISTICS OF A 40 SWEPT BACK WING OF ASPECT RATIO 4.5 by P. S. BARNA NOTE NO. 65 MAY, 1957 CRANFIELD A preliminary report on the aerodynamic characteristics
More informationLecture # 08: Boundary Layer Flows and Drag
AerE 311L & AerE343L Lecture Notes Lecture # 8: Boundary Layer Flows and Drag Dr. Hui H Hu Department of Aerospace Engineering Iowa State University Ames, Iowa 511, U.S.A y AerE343L #4: Hot wire measurements
More informationEXPERIMENTAL 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 informationExperimental investigation on the influence of wind direction on the aerodynamic loads acting on low aspect-ratio triangular prisms
Experimental investigation on the influence of wind direction on the aerodynamic loads acting on low aspect-ratio triangular prisms Giacomo Valerio Iungo and Guido Buresti Department of Aerospace Engineering,
More informationBasis of Structural Design
Basis of Structural Design Course 10 Actions on structures: Wind loads Other loads Course notes are available for download at http://www.ct.upt.ro/users/aurelstratan/ Wind loading: normative references
More informationAn Experimental Study of Vortex Shedding Behind a Bluff Body in a Water Channel
An Experimental Study of Vortex Shedding Behind a Bluff Body in a Water Channel ¹Meghanadhan C A, ² Sunil A S ¹PG Scholar, ² Associate Prof. Govt Engineering College Thrissur, Kerala,India Abstract-When
More informationSEMI-SPAN TESTING IN WIND TUNNELS
25 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES SEMI-SPAN TESTING IN WIND TUNNELS S. Eder, K. Hufnagel, C. Tropea Chair of Fluid Mechanics and Aerodynamics, Darmstadt University of Technology
More informationVORTEX SHEDDING INDUCED VIBRATIONS OF A LIGHT MAST
BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano, Italy, July, -4 8 VORTEX SHEDDING INDUCED VIBRATIONS OF A LIGHT MAST Bjarni Bessason, and Jónas Thór Snaæbjörnsson
More informationlated by the arrangement of spires and roughness blocks to fit the urban terrain (terrain IV, power law index = 0.7) specified in AIJ recommendation (
The Seventh International olloquium on Bluff Body Aerodynamics and Applications (BBAA7) Shanghai, hina; September -6, 01 ross spectra of wind pressures on domed roofs in boundary layer wind tunnel Yuan-Lung
More informationNumerical Analysis of Wind loads on Tapered Shape Tall Buildings
IJSTE - International Journal of Science Technology & Engineering Volume 1 Issue 11 May 2015 ISSN (online): 2349-784X Numerical Analysis of Wind loads on Tapered Shape Tall Buildings Ashwin G Hansora Assistant
More informationLecture # 08: Boundary Layer Flows and Controls
AerE 344 Lecture Notes Lecture # 8: Boundary Layer Flows and Controls Dr. Hui Hu Department of Aerospace Engineering Iowa State University Ames, Iowa 511, U.S.A Flow Separation on an Airfoil Quantification
More informationNumerical 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 informationSIMULATION OF THE FLOW FIELD CHARACTERISTICS OF TRANSIENT FLOW
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 2009, Taipei, Taiwan SIMULATION OF THE FLOW FIELD CHARACTERISTICS OF TRANSIENT FLOW S. Cao 1, Y. Zhao 2, H. Ozono, Y. Tamura, A.Kareem
More informationWind effects on tall building frames-influence of dynamic parameters
Indian Journal of Science and Technology Vol. 3 No. 5 (May 21) ISSN: 974-6846 583 Wind effects on tall building frames-influence of dynamic parameters B. Dean Kumar 1 and B.L.P. Swami 2 1 Department of
More informationSurrounding buildings and wind pressure distribution on a high rise building
Surrounding buildings and wind pressure distribution on a high rise building Conference or Workshop Item Accepted Version Luo, Z. (2008) Surrounding buildings and wind pressure distribution on a high rise
More informationExperimental investigation on the aft-element flapping of a two-element airfoil at high attack angle
Experimental investigation on the aft-element flapping of a two-element airfoil at high attack angle Tan Guang-kun *, Shen Gong-xin, Su Wen-han Beijing University of Aeronautics and Astronautics (BUAA),
More informationCOMPARISONS OF COMPUTATIONAL FLUID DYNAMICS AND
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 2009, Taipei, Taiwan COMPARISONS OF COMPUTATIONAL FLUID DYNAMICS AND WIND TUNNEL EXPERIMENTS FOR PEDESTRIAN WIND ENVIRONMENTS Chin-Hsien
More informationWind tunnel acoustic testing of wind generated noise on building facade elements
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/307638896 Wind tunnel acoustic testing of wind generated noise on building facade elements
More informationStudy on Bi-Plane Airfoils
Study on Bi-Plane Airfoils Experiment 5: Final Design Project MECHANICAL AEROSPACE ENGINEERING 108 WINDTUNNEL LAB Professor Gamero-Castaño cc: Rayomand Gundevia Date: 12/09/13 Jin Mok 49832571 1 Abstract...
More informationTHE TACOMA NARROWS BRIDGE FAILURE Revision A
By Tom Irvine Email: tomirvine@aol.com December 29, 1999 THE TACOMA NARROWS BRIDGE FAILURE Revision A Introduction The original Tacoma Narrows Bridge was opened to traffic on July 1, 1940. It was located
More informationExperimental Investigation of End Plate Effects on the Vertical Axis Wind Turbine Airfoil Blade
Experimental Investigation of End Plate Effects on the Vertical Axis Wind Turbine Airfoil Blade Rikhi Ramkissoon 1, Krishpersad Manohar 2 Ph.D. Candidate, Department of Mechanical and Manufacturing Engineering,
More informationWind Tunnel Tests of Wind Turbine Airfoils at High Reynolds Numbers
Journal of Physics: Conference Series OPEN ACCESS Wind Tunnel Tests of Wind Turbine Airfoils at High Reynolds Numbers To cite this article: E Llorente et al 014 J. Phys.: Conf. Ser. 54 0101 View the article
More informationAERODYNAMIC CHARACTERISTICS OF SPIN PHENOMENON FOR DELTA WING
ICAS 2002 CONGRESS AERODYNAMIC CHARACTERISTICS OF SPIN PHENOMENON FOR DELTA WING Yoshiaki NAKAMURA (nakamura@nuae.nagoya-u.ac.jp) Takafumi YAMADA (yamada@nuae.nagoya-u.ac.jp) Department of Aerospace Engineering,
More informationReduction of Skin Friction Drag in Wings by Employing Riblets
Reduction of Skin Friction Drag in Wings by Employing Riblets Kousik Kumaar. R 1 Assistant Professor Department of Aeronautical Engineering Nehru Institute of Engineering and Technology Coimbatore, India
More informationAF101 to AF109. Subsonic Wind Tunnel Models AERODYNAMICS. A selection of optional models for use with TecQuipment s Subsonic Wind Tunnel (AF100)
Page 1 of 4 A selection of optional models for use with TecQuipment s Subsonic Wind Tunnel (AF100) Dimpled Sphere Drag Model (from AF109) shown inside the TecQuipment AF100 Wind Tunnel. Cylinder, aerofoils,
More informationCFD Study of Solid Wind Tunnel Wall Effects on Wing Characteristics
Indian Journal of Science and Technology, Vol 9(45), DOI :10.17485/ijst/2016/v9i45/104585, December 2016 ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 CFD Study of Solid Wind Tunnel Wall Effects on
More informationThe Aerodynamic Drag of Parafoils
The Aerodynamic Drag of Parafoils A. C. Carruthers and A. Filippone The University of Manchester Manchester M60 1QD United Kingdom Introduction The parafoil is an aerodynamic decelerator that uses the
More informationUNIVERSITY OF HONG KONG LIBRARY. Hong Kong Collection
UNIVERSITY OF HONG KONG LIBRARY Hong Kong Collection CODE OF PRACTICE ON WIND EFFECTS HONG KONG-1983 BUILDING DEVELOPMENT DEPARTMENT HONG KONG PRINTED AND PUBLISHED BY THE GOVERNMENT PRINTER, HONG KONG
More informationAERODYNAMICS I LECTURE 7 SELECTED TOPICS IN THE LOW-SPEED AERODYNAMICS
LECTURE 7 SELECTED TOPICS IN THE LOW-SPEED AERODYNAMICS The sources of a graphical material used in this lecture are: [UA] D. McLean, Understanding Aerodynamics. Arguing from the Real Physics. Wiley, 2013.
More informationFLUID FORCE ACTING ON A CYLINDRICAL PIER STANDING IN A SCOUR
BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano, Italy, July, 20-24 2008 FLUID FORCE ACTING ON A CYLINDRICAL PIER STANDING IN A SCOUR Takayuki Tsutsui Department of
More informationRESILIENT INFRASTRUCTURE June 1 4, 2016
RESILIENT INFRASTRUCTURE June 4, 26 EFFECT OF WIND SPEED AND TERRAIN EXPOSURE ON THE WIND PRESSURES FOR ELEVATED STEEL CONICAL TANKS Ahmed Musa Ph.D Candidate, Western University, Canada Haitham Aboshosha
More informationTOWARD MORE ACCURATE PREDICTION OF DAMAGE DUE TO STRONG WINDS
TOWARD MORE ACCURATE PREDICTION OF DAMAGE DUE TO STRONG WINDS Kichiro KIMURA Kyushu Institute of Technology ABSTRACT: The insured losses of structures due to strong winds have been always dominant and
More informationJOURNAL PUBLICATIONS
1 JOURNAL PUBLICATIONS 71. Lee, T., Mageed, A., Siddiqui, B. and Ko, L.S., (2016) Impact of ground proximity on aerodynamic properties of an unsteady NACA 0012 airfoil, submitted to Journal of Aerospace
More informationComputational Analysis of Cavity Effect over Aircraft Wing
World Engineering & Applied Sciences Journal 8 (): 104-110, 017 ISSN 079-04 IDOSI Publications, 017 DOI: 10.589/idosi.weasj.017.104.110 Computational Analysis of Cavity Effect over Aircraft Wing 1 P. Booma
More informationSubsonic wind tunnel models
aerodynamics AF1300a to AF1300l A selection of optional models for use with TecQuipment s Subsonic Wind Tunnel (AF1300) Dimpled Sphere Drag Model (from AF1300j) shown inside the TecQuipment AF1300 Wind
More informationUniversity of Bristol - Explore Bristol Research. Publisher's PDF, also known as Version of record
Liu, X., Azarpeyvand, M., & Joseph, P. (2015). On the acoustic and aerodynamic performance of serrated airfoils. Paper presented at The 22nd International Congress on Sound and Vibration, Florence, France.
More informationWind 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 informationNumerical Investigation of Multi Airfoil Effect on Performance Increase of Wind Turbine
International Journal of Engineering & Applied Sciences (IJEAS) International Journal of Engineering Applied Sciences (IJEAS) Vol.9, Issue 3 (2017) 75-86 Vol.x, Issue x(201x)x-xx http://dx.doi.org/10.24107/ijeas.332075
More informationAn Overview of Wind Engineering Where Climate Meets Design
An Overview of Wind Engineering Where Climate Meets Design Presented by Derek Kelly, M.Eng., P.Eng. Principal/Project Manager www.rwdi.com RWDI Leadership & Consulting Expertise RWDI Consulting Engineers
More information2-D Computational Analysis of a Vertical Axis Wind Turbine Airfoil
2-D Computational Analysis of a Vertical Axis Wind Turbine Airfoil Akshay Basavaraj1 Student, Department of Aerospace Engineering, Amrita School of Engineering, Coimbatore 641 112, India1 Abstract: This
More informationThe effect of back spin on a table tennis ball moving in a viscous fluid.
How can planes fly? The phenomenon of lift can be produced in an ideal (non-viscous) fluid by the addition of a free vortex (circulation) around a cylinder in a rectilinear flow stream. This is known as
More informationAerodynamic behavior of a discus
Available online at www.sciencedirect.com Procedia Engineering 34 (2012 ) 92 97 9 th Conference of the International Sports Engineering Association (ISEA) Aerodynamic behavior of a discus Kazuya Seo a*,
More informationNUMERICAL SIMULATION OF ACTIVE FLOW CONTROL BASED ON STREAMWISE VORTICES FOR A BLUNT TRAILING EDGE AIRFOIL
BBAA VI International Colloquium on: Bluff Bodies Aerodynamics & Applications Milano, Italy, July, 20-24 2008 NUMERICAL SIMULATION OF ACTIVE FLOW CONTROL BASED ON STREAMWISE VORTICES FOR A BLUNT TRAILING
More informationEVALUATION OF AERODYNAMIC STABLITY FOR INCHEON CABLE-STAYED BRIDGE
EVALUATION OF AERODYNAMIC STABLITY FOR INCHEON CABLE-STAYED BRIDGE Yun-Seok KIM President, Ph.D., TESolution Co., Ltd. yskim@tesolution.com Seung-Woo LEE General Manager, Ph.D., TESolution Co., Ltd. swlee@tesolution.com
More informationConditions for occurrence of vortex shedding on a large cable stayed bridge. Full scale data from monitoring system
Conditions for occurrence of vortex shedding on a large cable stayed bridge. Full scale data from monitoring system O. Flamand 1, F. De Oliveira 1 and A. Stathopoulos-Vlamis, P. Papanikolas 2 1 Centre
More informationof a thin airfoil in fully correlated gusts with sinusoidal fluctuations(liepmanm 195): χ L * ( f ) 1 1 π f = + (1) where is the square of modules of
Shanghai, China; September -6, 01 Measurements of equivalent aerodynamic admittances of two separate and parallel bridge decks Qi Zhou a,b, Le-Dong Zhu a,c, Peng-Jie Ren a,c a State Key Laboratory for
More informationSCREENING OF TOPOGRAPHIC FACTOR ON WIND SPEED ESTIMATION WITH NEURAL NETWORK ANALYSIS
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-12, 2009, Taipei, Taiwan SCREENING OF TOPOGRAPHIC FACTOR ON WIND SPEED ESTIMATION WITH NEURAL NETWORK ANALYSIS Fumiaki Nagao 1 Minoru
More informationComputational Analysis of Blunt Trailing Edge NACA 0012 Airfoil
Computational Analysis of Blunt Trailing Edge NACA 2 Airfoil Anusha K Department of Aerospace Engineering Madras Institute of Technology, India anusugan7@gmail.com Abstract Blunt trailing edge airfoil
More informationINTERFERENCE EFFECTS OF TWO BUILDINGS ON PEAK WIND PRESSURES
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-, 9, Taipei, Taiwan INTERFERENCE EFFECTS OF TWO BUILDINGS ON PEAK WIND PRESSURES Wonsul Kim, Yukio Tamura and Akihito Yoshida 3 Ph.D.
More informationPREDICTION THE EFFECT OF TIP SPEED RATIO ON WIND TURBINE GENERATOR OUTPUT PARAMETER
Int. J. Mech. Eng. & Rob. Res. 2012 Hari Pal Dhariwal et al., 2012 Research Paper ISSN 2278 0149 www.ijmerr.com Vol. 1, No. 3, October 2012 2012 IJMERR. All Rights Reserved PREDICTION THE EFFECT OF TIP
More informationEffects of wind incidence angle on wind pressure distribution on square plan tall buildings
J. Acad. Indus. Res. Vol. 1(12) May 2013 747 RESEARCH ARTICLE ISSN: 2278-5213 Effects of wind incidence angle on wind pressure distribution on square plan tall buildings S.K. Verma 1, A.K. Ahuja 2* and
More informationModular repetitive structures as countermeasure to galloping
Modular repetitive structures as countermeasure to galloping *Elena Dragomirescu ) and Yarzar Tun ) ), ) Department of Civil Engineering, University of Ottawa, Ottawa KN 6N5, Canada ) elndrag@uottawa.ca
More informationDesign of Cyclone Shelters Based on Wind Tunnel Studies
The Eighth Asia-Pacific Conference on Wind Engineering, December 10 14, 013, Chennai, India Design of Cyclone Shelters Based on Wind Tunnel Studies S. Selvi Rajan Chief Scientist and Head, Wind Engineering
More informationEXPERIMENTAL ANALYSIS OF FLOW OVER SYMMETRICAL AEROFOIL Mayank Pawar 1, Zankhan Sonara 2 1,2
EXPERIMENTAL ANALYSIS OF FLOW OVER SYMMETRICAL AEROFOIL Mayank Pawar 1, Zankhan Sonara 2 1,2 Assistant Professor,Chandubhai S. Patel Institute of Technology, CHARUSAT, Changa, Gujarat, India Abstract The
More informationInvestigation of Interference Effects for a Group of Finite Cylinders. 2.Tamkang University, Taipei, Taiwan ABSTRACT
Investigation of Interference Effects for a Group of Finite Cylinders A. Kareem 1, Tracy Kijewski 1, Po-Chien Lu 2 1. University of Notre Dame, NatHaz Modeling Laboratory, Dept. of Civil Engineering and
More informationAn Analysis of Lift and Drag Forces of NACA Airfoils Using Python
An Analysis of Lift and Drag Forces of NACA Airfoils Using Python 1. Tarun B Patel, Sandip T Patel 2, Divyesh T Patel 3, Maulik Bhensdadiya 4 1 M E scholar Government Engineering College, Valsad, Gujarat,
More informationHEFAT th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics July 2012 Malta
HEFAT212 9 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics 16 18 July 212 Malta AN EXPERIMENTAL STUDY OF SWEEP ANGLE EFFECTS ON THE TRANSITION POINT ON A 2D WING BY USING
More informationSTUDIES ON THE OPTIMUM PERFORMANCE OF TAPERED VORTEX FLAPS
ICAS 2000 CONGRESS STUDIES ON THE OPTIMUM PERFORMANCE OF TAPERED VORTEX FLAPS Kenichi RINOIE Department of Aeronautics and Astronautics, University of Tokyo, Tokyo, 113-8656, JAPAN Keywords: vortex flap,
More informationCritical Gust Pressures on Tall Building Frames-Review of Codal Provisions
Dr. B.Dean Kumar Dept. of Civil Engineering JNTUH College of Engineering Hyderabad, INDIA bdeankumar@gmail.com Dr. B.L.P Swami Dept. of Civil Engineering Vasavi College of Engineering Hyderabad, INDIA
More informationLEADING-EDGE VORTEX FLAPS FOR SUPERSONIC TRANSPORT CONFIGURATION -EFFECTS OF FLAP CONFIGURATIONS AND ROUNDED LEADING-EDGES-
ICAS 2002 CONGRESS LEADING-EDGE VORTEX FLAPS FOR SUPERSONIC TRANSPORT CONFIGURATION -EFFECTS OF FLAP CONFIGURATIONS AND ROUNDED LEADING-EDGES- Kenichi RINOIE*, Dong Youn KWAK**, Katsuhiro MIYATA* and Masayoshi
More informationAvailable online at ScienceDirect. The 2014 Conference of the International Sports Engineering Association
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 72 ( 2014 ) 435 440 The 2014 Conference of the International Sports Engineering Association Accuracy performance parameters
More informationAF100. Subsonic Wind Tunnel AERODYNAMICS. Open-circuit subsonic wind tunnel for a wide range of investigations into aerodynamics
Open-circuit subsonic wind tunnel for a wide range of investigations into aerodynamics Page 1 of 4 Works with Computer, chair and work table shown for photographic purposes only (not included) Screenshot
More information