CFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS

Size: px
Start display at page:

Download "CFD SIMULATIONS OF GAS DISPERSION IN VENTILATED ROOMS"

Transcription

1 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 to dispersion of gases of various densities that can be released accidentally in an industrial plant, especially a nuclear facility, IRSN has been conducting for several years an experimental and numerical research program on gas dispersion in ventilated rooms. Numerical simulations are performed using a commercial CFD code (ANSYS CFX). The program objective is to validate the computer code on gas tracing experiments based on the injection of sulphur hexafluoride SF 6 (heavy gas simulating UF 6 ) or helium (simulating the light gas H 2 ) in two ventilated rooms of the IRSN ( m to 1600 m ), for various ventilation and injection configurations. In an initial study of heavy gas (SF 6 ) dispersion, Ricciardi et al. (2008) performed a first validation of the CFD code ANSYS CFX but some experimental cases were not correctly reproduced. In a second stage, after a study of sensitivity to various parameters, but especially to the discretization scheme, we have retained a data set with the optimal numerical parameters, allowing to greatly improve the simulation of dispersion of heavy gas (SF 6 ) and to well reproduce the experimental results of dispersion of light gas (helium), obtained by Prévost et al. (2007). The simulation results of tests carried out with helium and SF 6, and their comparison with experimental results, are presented in this paper. Keywords: Simulations, CFD, dispersion, helium, SF 6, ventilated room, hydrogen, LEL. 1 Introduction In the nuclear industry, the fuel cycle is made up of a succession of steps in the course of which the fuel undergoes various transformations, before or after its use in the reactor. Although closely monitored, these various steps are susceptible to an incident, even an accident, in the course of which gases can be released and dispersed in the rooms of the nuclear facilities. Depending on the step involved (upstream or downstream of the cycle, reactor), these gases can be of high density compared with air, as it is the case for example for UF 6 (uranium hexafluoride, present during the conversion and uranium enrichment phase), or of low density compared with air, as it is the case for hydrogen. The latter can be produced in the event of a severe accident in a reactor building (Fukushima accident, TMI, etc.), or released in the event of a rupture in pipes carrying hydrogen, used to cool the turbines in the machine room. In the context of safety evaluation of nuclear facilities, this type of incident has been especially studied and monitored, notably the density effects that can lead to a local accumulation of gas and, in the case of hydrogen, to a risk of explosion. This type of risk is obviously not specific of nuclear field and may also occur in the chemical industry (manufacture of sulphuric acid). An initial study on dispersion of a heavy gas in a ventilated room was conducted by Ricciardi et al. (2008). This study, both experimental and computational, shows that even in low quantities, injection of a gas of high density compared with air, in this case SF 6 (tracer Page 1/6

2 used to simulate a heavy gas), can lead to stratification phenomena and thus creates areas of high concentration. The experimental results acquired in this initial study allowed the ANSYS CFX version code to be satisfactorily validated, although certain phenomena could not be reproduced. In particular, when gas injection into the ventilated room stopped, the decrease in SF 6 concentration was linked, in the simulations, to the air exchange rate in the room, while in the experiments, an additional effect due to the gas falling in the room was observed. Following this study, and in the framework of an experimental and numerical study related to the inverse problem of emission of a light gas (Prévost et al. (2007)), we performed a study of sensitivity highlighting especially the need of a 2 nd order discretization scheme called "High Resolution Scheme" (HRS) in ANSYS CFX. This study of sensitivity is presented in details in Gélain and Prévost (submitted in 2012). In this paper, we first present the program set up in order to study the dispersion of a heavy or light gas in a ventilated room, and the test grids which were then simulated with the ANSYS CFX code version 12 (2009). The experimental study was carried out so as to obtain a multidimensional cartography of the concentration of a gaseous tracer injected into the room. Some numerical results of dispersion of heavy and light gas are then presented and compared to experimental results. 2 Experimental program This experimental study was performed in two rooms of different volumes, the m CEPIA room and the 1600 m room 4, shown in Fig. 1 and Fig. 2. These two rooms also differ in their ventilation system. CEPIA (Fig. 1) has four supply openings located on one side of the room and four exhaust openings on the opposite side, thus allowing the various ventilation configurations to be adjusted. For the tests studied in this article, the ventilation configuration used consists of two blowers in a high position in the room and two exhaust vents on the opposite side in a low position in the room. Figure 1: CEPIA By contrast, the ventilation of room 4 consists of a central duct in the upper part, from which five blower ducts branch off, each with three outlets in the upper part, middle part and lower part, while two exhaust openings are located on the lower part of one of the sides of the room. Figure 2: room 4 Page 2/6

3 Table 1: test grid for CEPIA (He and The tests performed in these two rooms SF 6 ) consist in injecting a tracer gas (SF 6 or helium) vertically into the lower part of the room for a given time, under stable airflow conditions. During the test, the time evolution of the concentration of tracer gas is monitored at various points in the room to study its dispersion (Fig. 1 and 2). Various parameters have been studied, related either to ventilation (air exchange rate R), or to injection of the tracer (injection velocity U inj, diameter of the injection nozzle d inj, duration of injection t inj ). The test grids are presented in Table 1 for CEPIA and Table 2 for the room 4. In Table 2, we only present the grid for helium; the Test 1 Test 2 Test Test 4 Test Test test grid for SF 6 in the room 4 are detailed in Ricciardi et al. (2008). Test R (h -1 ) tinj (s) dinj (mm) Uinj (m.s -1 ) Table 2 : test grid for room 4 (He) Test R (h -1 ) dinj(mm) Uinj(m.s -1 ) Test Test Test Test In Tables 1 and 2, two air exchange rates R (1 h -1 and h -1 ) are used and four injection duct diameters d inj ( mm and mm for CEPIA - 4 mm and 10 mm for room 4) are studied, while the injection velocities U inj vary between 6 m.s -1 and 0 m.s -1 for CEPIA and 2.6 m.s -1 and 2.6 m.s -1 for room 4. The injection times t inj are either 120 s or s for CEPIA while for the room 4, injection continues until the equilibrium of the concentration (around s). Numerical simulations.1 Basic equations The numerical simulations of the flows and dispersion of the tracer gas in the ventilated rooms studied are performed with the CFD code ANSYS CFX (version 12). The flows are simulated by solving the non-stationary Navier-Stokes equations with turbulence using a standard RANS (Reynolds Averaged Navier Stokes) formulation. The equations solved in the calculations performed with CFX are based on some assumptions: the fluid considered is a mixture of air and tracer gas (helium or SF 6 ), taken to be mixed at the molecular level (multi-species formulation). The flow is turbulent, isothermal (2 C) and weakly compressible. The gaseous mixture is considered to be an ideal gas. Two gases, air and tracer gas, are considered, but only the tracer gas transport is simulated, the mass fraction of air being calculated as the difference. Before the injection, the flow is taken to be established, and for this an initial stationary calculation is performed, followed by a second transient calculation in two phases: injection of tracer for a given time, then decrease of the tracer concentration after injection ends. Page /6

4 .2 Geometry and meshes The geometries of CEPIA ( m ) and room 4 (1600 m ) are shown in Fig.. They have been produced using the ANSYS Design Modeler software. (a) CEPIA (b) room 4 Figure : geometries of the rooms studied (a) CEPIA (b) room 4 Figure 4: meshes for the geometries studied The meshes were produced using ANSYS Meshing and are shown in Fig. 4. These meshes are non-structured and composed of tetrahedral cells.. Computational parameters To carry out the calculations, it is necessary to specify the numerical methods used by the solver to discretize the advection terms as well as the convergence parameters for the calculations. For this application, two discretization schemes are available in CFX, 1 st -order (Upwind Differencing Scheme) or hybrid (High Resolution Scheme), the first being more diffusive in areas of high gradients than the second, which adjusts the order of the discretization scheme depending on the local gradients. These different schemes are detailed in the technical documentation for CFX-12 (2009). Finally, the HRS scheme was chosen for all the calculations after the performing of sensitivity study (Gélain and Prévost, submitted). We also specify the convergence parameters for the calculation, namely the number of iterations per time step, chosen to be for the study, and the convergence criterion, which is chosen to be 10-6 for the RMS (Root Mean Square) Max residuals. Finally, the transient calculation has been carried out with a time step of 1 s. A sensitivity study allowed to validate the meshes presented on the Fig. 4, and to choose the k- model of turbulence and the HRS discretization scheme for all the calculations. Page 4/6

5 4 Results and discussions 4.1 CEPIA room ( m ) Different tests were simulated with the ANSYS CFX code in CEPIA, to assess the influence of some parameters, and were compared with the experimental results for each of the proposed tests; only some examples are presented in this paper. The results are reported in the form of average values per level (high, median, low and floor), calculated from the values measured at the different sampling points. For the case of SF 6 injection, the Test 6 (Fig. ) is considered, because its simulation with CFX has been greatly improved with the HRS scheme in comparison with that presented in Ricciardi et al. Test 6 HRS scheme Figure : variations in SF 6 concentrations in the CEPIA room at different levels (Test 6) Figure 6: variations in helium concentrations in the CEPIA room at different levels (Test 1) (2008). Indeed, in the latter, the phenomena of abrupt decrease in concentration at the low and median levels (blue and red curves) revealed experimentally were not correctly simulated by the CFX version.7.1 code using a first order scheme. For the case of helium injection, the Test 1 (Fig. 6) is presented and shows a good agreement between experimental and numerical results, which confirms the choices considered in the data set. 4.2 Room 4 (1600 m ) As for CEPIA, different tests were simulated with the ANSYS CFX code in the room 4, and compared with the experimental results for all the tests performed. The simulations of SF 6 dispersion in the room 4 are not presented, because no improvement was made by the new data set including the HRS scheme compared to the simulations of Ricciardi et al. (2008). Fig. 7 presents the results for the Test 1 in the room 4 and shows a good agreement between the simulations results and the experimental ones. Page /6

6 Figure : variations of helium concentrations in room 4 at different levels (Test 1) Conclusion This paper, which follows the study conducted by Ricciardi et al. (2008) on dispersion of a heavy gas (SF 6 ) in a ventilated room, presents simulation results of dispersion of heavy (SF 6 ) and light gas (helium) in ventilated rooms, obtained with the ANSYS CFX version 12 code. These simulations were carried out on the basis of tests performed in two rooms of different volumes, the CEPIA room ( m ) and the room 4 (1600 m ). The data set of the code was improved since the previous study, by the use of a 2 nd order numerical scheme (HRS), retained in the framework of a study of sensitivity. This choice allows to much better reproduce the evolution of SF 6 concentration in CEPIA after the end of the gas injection. Moreover, the numerical results of dispersion of light gas show also a good agreement with the experimental results, validating the ANSYS CFX code and the data set implemented for this application. Taking into account of the heterogeneity and the high levels of the gas concentration observed in some cases, and in the context of safety analyses related to hydrogen risk, a study is currently underway from tests allowing maximum local concentrations of at least 4 %, which represents the Lower Explosive Limit (LEL) of hydrogen, to be attained. 6 References ANSYS CFX-Solver Theory Guide (2009), Release Gélain, T., Prévost, C. (2012) Experimental and numerical study of light gas dispersion in a ventilated room, submitted to Computers and Fluids. Prévost, C., Bouilloux, L., Gélain, T., Norvez, O. and Ricciardi, L. (2007) Study of gas dispersion in ventilated rooms. Roomvent, Helsinki. Ricciardi, L., Prévost, C., Bouilloux, L. and Sestier-Carlin, R. (2008) Experimental and numerical study of heavy gas dispersion in a ventilated room, Journal of Hazardous Materials 12, Page 6/6

OPTIMIZING THE LENGTH OF AIR SUPPLY DUCT IN CROSS CONNECTIONS OF GOTTHARD BASE TUNNEL. Rehan Yousaf 1, Oliver Scherer 1

OPTIMIZING THE LENGTH OF AIR SUPPLY DUCT IN CROSS CONNECTIONS OF GOTTHARD BASE TUNNEL. Rehan Yousaf 1, Oliver Scherer 1 OPTIMIZING THE LENGTH OF AIR SUPPLY DUCT IN CROSS CONNECTIONS OF GOTTHARD BASE TUNNEL Rehan Yousaf 1, Oliver Scherer 1 1 Pöyry Infra Ltd, Zürich, Switzerland ABSTRACT Gotthard Base Tunnel with its 57 km

More information

AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE

AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE - 247 - AIRFLOW GENERATION IN A TUNNEL USING A SACCARDO VENTILATION SYSTEM AGAINST THE BUOYANCY EFFECT PRODUCED BY A FIRE J D Castro a, C W Pope a and R D Matthews b a Mott MacDonald Ltd, St Anne House,

More information

CFD Simulation and Experimental Validation of a Diaphragm Pressure Wave Generator

CFD Simulation and Experimental Validation of a Diaphragm Pressure Wave Generator CFD Simulation and Experimental Validation of a Diaphragm Pressure Wave Generator T. Huang 1, A. Caughley 2, R. Young 2 and V. Chamritski 1 1 HTS-110 Ltd Lower Hutt, New Zealand 2 Industrial Research Ltd

More information

MODELING AND SIMULATION OF VALVE COEFFICIENTS AND CAVITATION CHARACTERISTICS IN A BALL VALVE

MODELING AND SIMULATION OF VALVE COEFFICIENTS AND CAVITATION CHARACTERISTICS IN A BALL VALVE Proceedings of the 37 th International & 4 th National Conference on Fluid Mechanics and Fluid Power FMFP2010 December 16-18, 2010, IIT Madras, Chennai, India FMFP2010 341 MODELING AND SIMULATION OF VALVE

More information

SPONTANEOUS IGNITION OF PRESSURIZED HYDROGEN RELEASE

SPONTANEOUS IGNITION OF PRESSURIZED HYDROGEN RELEASE SPONTANEOUS IGNITION OF PRESSURIZED HYDROGEN RELEASE B. P. Xu 1, L. EL Hima 1, J. X. Wen 1, S. Dembele 1 and V.H.Y. Tam 2 1 Faculty of Engineering, Kingston University Friars Avenue, London, SW15 3DW,

More information

CFD and Physical Modeling of DSI/ACI Distribution

CFD and Physical Modeling of DSI/ACI Distribution CFD and Physical Modeling of DSI/ACI Distribution APC Round Table & Exposition July 09, 2013 Matt Gentry mgentry@airflowsciences.com 734-525-0300 1 Outline Introduction Flow Analysis Techniques Application

More information

Effect of Diameter on the Aerodynamics of Sepaktakraw Balls, A Computational Study

Effect of Diameter on the Aerodynamics of Sepaktakraw Balls, A Computational Study ISSN 1750-9823 (print) International Journal of Sports Science and Engineering Vol. 03 (2009) No. 01, pp. 017-021 Effect of Diameter on the Aerodynamics of Sepaktakraw Balls, A Computational Study Zahari

More information

EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY

EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY E. Porcheron, P. Lemaitre, A. Nuboer, V. Rochas and J. Vendel Institut de Radioprotection et de Sûreté Nucléaire

More information

HYDROGEN RISK ANALYSIS FOR A GENERIC NUCLEAR CONTAINMENT VENTILATION SYSTEM

HYDROGEN RISK ANALYSIS FOR A GENERIC NUCLEAR CONTAINMENT VENTILATION SYSTEM HYDROGEN RISK ANALYSIS FOR A GENERIC NUCLEAR CONTAINMENT VENTILATION SYSTEM u, Z. 1 and Jordan, T. 2 Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany 1 zhanjie.xu@kit.edu, 2 thomas.jordan@kit.edu

More information

Workshop 1: Bubbly Flow in a Rectangular Bubble Column. Multiphase Flow Modeling In ANSYS CFX Release ANSYS, Inc. WS1-1 Release 14.

Workshop 1: Bubbly Flow in a Rectangular Bubble Column. Multiphase Flow Modeling In ANSYS CFX Release ANSYS, Inc. WS1-1 Release 14. Workshop 1: Bubbly Flow in a Rectangular Bubble Column 14. 5 Release Multiphase Flow Modeling In ANSYS CFX 2013 ANSYS, Inc. WS1-1 Release 14.5 Introduction This workshop models the dispersion of air bubbles

More information

ANALYSIS OF AERODYNAMIC CHARACTERISTICS OF A SUPERCRITICAL AIRFOIL FOR LOW SPEED AIRCRAFT

ANALYSIS OF AERODYNAMIC CHARACTERISTICS OF A SUPERCRITICAL AIRFOIL FOR LOW SPEED AIRCRAFT ANALYSIS OF AERODYNAMIC CHARACTERISTICS OF A SUPERCRITICAL AIRFOIL FOR LOW SPEED AIRCRAFT P.Sethunathan 1, M.Niventhran 2, V.Siva 2, R.Sadhan Kumar 2 1 Asst.Professor, Department of Aeronautical Engineering,

More information

An Impeller Blade Analysis of Centrifugal Gas Compressor Using CFD

An Impeller Blade Analysis of Centrifugal Gas Compressor Using CFD An Impeller Blade Analysis of Centrifugal Gas Compressor Using CFD Vivek V. Kulkarni Department of Mechanical Engineering KLS Gogte Institute of Technology, Belagavi, Karnataka Dr. Anil T.R. Department

More information

EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY

EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY EXPERIMENTAL STUDY OF HEAT, MASS AND MOMENTUM TRANSFERS IN A SPRAY IN THE TOSQAN FACILITY E. Porcheron, P. Lemaitre, A. Nuboer, V. Rochas and J. Vendel Institut de Radioprotection et de Sûreté Nucléaire

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

ADVANCES in NATURAL and APPLIED SCIENCES

ADVANCES in NATURAL and APPLIED SCIENCES ADVANCES in NATURAL and APPLIED SCIENCES ISSN: 1995-0772 Published BYAENSI Publication EISSN: 1998-1090 http://www.aensiweb.com/anas 2017 June 11(8): pages 408-415 Open Access Journal Design of Absorptive

More information

MODELING&SIMULATION EXTRAPOLATED INTERNAL ARC TEST RESULTS: A COUPLED FLUID-STRUCTURAL TRANSIENT METHODOLOGY

MODELING&SIMULATION EXTRAPOLATED INTERNAL ARC TEST RESULTS: A COUPLED FLUID-STRUCTURAL TRANSIENT METHODOLOGY MODELING&SIMULATION EXTRAPOLATED INTERNAL ARC TEST RESULTS: A COUPLED FLUID-STRUCTURAL TRANSIENT METHODOLOGY Jérôme DOUCHIN Schneider Electric France Jerome.douchin@schneider-electric.com Ezequiel Salas

More information

NUMERICAL INVESTIGATION OF THE FLOW BEHAVIOUR IN A MODERN TRAFFIC TUNNEL IN CASE OF FIRE INCIDENT

NUMERICAL INVESTIGATION OF THE FLOW BEHAVIOUR IN A MODERN TRAFFIC TUNNEL IN CASE OF FIRE INCIDENT - 277 - NUMERICAL INVESTIGATION OF THE FLOW BEHAVIOUR IN A MODERN TRAFFIC TUNNEL IN CASE OF FIRE INCIDENT Iseler J., Heiser W. EAS GmbH, Karlsruhe, Germany ABSTRACT A numerical study of the flow behaviour

More information

An Investigation on the Performance Characteristics of a Centrifugal Compressor

An Investigation on the Performance Characteristics of a Centrifugal Compressor International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 10, Issue 11 (November 2014), PP.77-83 An Investigation on the Performance Characteristics

More information

SIMULATIONS OF HYDROGEN RELEASES FROM A STORAGE TANKS: DISPERSION AND CONSEQUENCES OF IGNITION

SIMULATIONS OF HYDROGEN RELEASES FROM A STORAGE TANKS: DISPERSION AND CONSEQUENCES OF IGNITION SIMULATIONS OF HYDROGEN RELEASES FROM A STORAGE TANKS: DISPERSION AND CONSEQUENCES OF IGNITION Angers, B. 1, Hourri, A. 1, Bénard, P. 1, Tessier, P. 2 and Perrin, J. 3 1 Hydrogen Research Institute, Université

More information

Wind Flow Model of Area Surrounding the Case Western Reserve University Wind Turbine

Wind Flow Model of Area Surrounding the Case Western Reserve University Wind Turbine Wind Flow Model of Area Surrounding the Case Western Reserve University Wind Turbine Matheus C. Fernandes 1, David H. Matthiesen PhD *2 1 Case Western Reserve University Dept. of Mechanical Engineering,

More information

SIMULATION OF ENTRAPMENTS IN LCM PROCESSES

SIMULATION OF ENTRAPMENTS IN LCM PROCESSES Douai, FRANCE - July 6 SIMULATION OF ENTRAPMENTS IN LCM PROCESSES René Arbter, Paolo Ermanni Centre of Structure Technologies ETH Zurich, Leonhardstr. 7, 89 Zurich, Switzerland: rarbter@ethz.ch ABSTRACT:

More information

OPTIMIZATION OF SINGLE STAGE AXIAL FLOW COMPRESSOR FOR DIFFERENT ROTATIONAL SPEED USING CFD

OPTIMIZATION OF SINGLE STAGE AXIAL FLOW COMPRESSOR FOR DIFFERENT ROTATIONAL SPEED USING CFD http:// OPTIMIZATION OF SINGLE STAGE AXIAL FLOW COMPRESSOR FOR DIFFERENT ROTATIONAL SPEED USING CFD Anand Kumar S malipatil 1, Anantharaja M.H 2 1,2 Department of Thermal Power Engineering, VTU-RO Gulbarga,

More information

VALIDATION OF CFD FOR CONTAINMENT JET FLOWS INCLUDING CONDENSATION. Matthias Heitsch, Daniele Baraldi, Heinz Wilkening

VALIDATION OF CFD FOR CONTAINMENT JET FLOWS INCLUDING CONDENSATION. Matthias Heitsch, Daniele Baraldi, Heinz Wilkening VALIDATION OF CFD FOR CONTAINMENT JET FLOWS INCLUDING CONDENSATION Matthias Heitsch, Daniele Baraldi, Heinz Wilkening JRC, Institute for Energy, Postbus 2, NL-1755 ZG Petten, Netherland Matthias.Heitsch@ec.europa.eu

More information

Internal Arc Simulation in MV/LV Substations. Charles BESNARD 8 11 June 2009

Internal Arc Simulation in MV/LV Substations. Charles BESNARD 8 11 June 2009 Internal Arc Simulation in MV/LV Substations Charles BESNARD 8 11 June 2009 The Internal Arc Fault The fault A highly energetic and destructive arc (10, 20, 40 MJ!) The effects and the human risks Overpressures

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

A Numerical Simulation of Fluid-Structure Interaction for Refrigerator Compressors Suction and Exhaust System Performance Analysis

A Numerical Simulation of Fluid-Structure Interaction for Refrigerator Compressors Suction and Exhaust System Performance Analysis 1131, Page 1 A Numerical Simulation of Fluid-Structure Interaction for Refrigerator Compressors Suction and Exhaust System Performance Analysis Shoufei Wu*, Zonghuai Wang Jiaxipera Compressor Co., Ltd.,

More information

Injector Dynamics Assumptions and their Impact on Predicting Cavitation and Performance

Injector Dynamics Assumptions and their Impact on Predicting Cavitation and Performance Injector Dynamics Assumptions and their Impact on Predicting Cavitation and Performance Frank Husmeier, Cummins Fuel Systems Presented by Laz Foley, ANSYS Outline Overview Computational Domain and Boundary

More information

CONSIDERATION OF DENSITY VARIATIONS IN THE DESIGN OF A VENTILATION SYSTEM FOR ROAD TUNNELS

CONSIDERATION OF DENSITY VARIATIONS IN THE DESIGN OF A VENTILATION SYSTEM FOR ROAD TUNNELS - 56 - CONSIDERATION OF DENSITY VARIATIONS IN THE DESIGN OF A VENTILATION SYSTEM FOR ROAD TUNNELS Gloth O., Rudolf A. ILF Consulting Engineers Zürich, Switzerland ABSTRACT This article investigates the

More information

Experimental Characterization and Modeling of Helium Dispersion in a ¼-Scale Two-Car Residential Garage

Experimental Characterization and Modeling of Helium Dispersion in a ¼-Scale Two-Car Residential Garage Experimental Characterization and Modeling of Helium Dispersion in a ¼-Scale Two-Car Residential Garage William M. Pitts, Jiann C. Yang, Kuldeep Prasad, and Marco Fernandez National Institute of Standards

More information

Large-eddy simulation of a turbulent buoyant helium plume

Large-eddy simulation of a turbulent buoyant helium plume Center for Turbulence Research Annual Research Briefs 8 45 Large-eddy simulation of a turbulent buoyant helium plume By G. Blanquart AND H. Pitsch. Motivation and objectives The numerical simulation of

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

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

Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events

Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events Experimental Verification of Integrated Pressure Suppression Systems in Fusion Reactors at In-Vessel Loss-of -Coolant Events K. Takase 1), H. Akimoto 1) 1) Japan Atomic Energy Research Institute (JAERI),

More information

CFD Analysis of Giromill Type Vertical Axis Wind Turbine

CFD Analysis of Giromill Type Vertical Axis Wind Turbine 242 CFD Analysis Giromill Type Vertical Axis Wind Turbine K. Sainath 1, T. Ravi 2, Suresh Akella 3, P. Madhu Sudhan 4 1 Associate Pressor, Department Mechanical Engineering, Sreyas Inst. Engg. & Tech.,

More information

The effect of wind speed on the performance of a split chimney

The effect of wind speed on the performance of a split chimney 2012 International Conference on Fluid Dynamics and Thermodynamics Technologies (FDTT 2012) IPCSIT vol.33(2012) (2012) IACSIT Press, Singapore The effect of wind speed on the performance of a split chimney

More information

Study by numerical simulations on the breathing effect in a semi-underground highway with beams and a roof above it

Study by numerical simulations on the breathing effect in a semi-underground highway with beams and a roof above it Study by numerical simulations on the breathing effect in a semi-underground highway with beams and a roof above it M Hagiwara East Nippon Expressway Co., Ltd, Japan A Mizuno, T Tsutaki Kogakuin University,

More information

Simulations of hydrogen releases from high pressure storage systems

Simulations of hydrogen releases from high pressure storage systems Simulations of hydrogen releases from high pressure storage systems Benjamin Angers a, Pierre Bénard a, Ahmed Hourri a, Pascal Tessier b and Jérôme Perrin c a Institut de recherche sur l hydrogène, Université

More information

Thermodynamic Study of Compartment Venting

Thermodynamic Study of Compartment Venting Thermodynamic Study of Compartment Venting Francisco Manuel Bargado Benavente francisco.benavente@tecnico.ulisboa.pt Instituto Superior Técnico, Universidade de Lisboa Lisbon, Portugal Abstract Compartment

More information

THEORETICAL EVALUATION OF FLOW THROUGH CENTRIFUGAL COMPRESSOR STAGE

THEORETICAL EVALUATION OF FLOW THROUGH CENTRIFUGAL COMPRESSOR STAGE THEORETICAL EVALUATION OF FLOW THROUGH CENTRIFUGAL COMPRESSOR STAGE S.Ramamurthy 1, R.Rajendran 1, R. S. Dileep Kumar 2 1 Scientist, Propulsion Division, National Aerospace Laboratories, Bangalore-560017,ramamurthy_srm@yahoo.com

More information

CFD Analysis of Supersonic Nozzle with Varying Divergent Profile

CFD Analysis of Supersonic Nozzle with Varying Divergent Profile CFD Analysis of Supersonic Nozzle with Varying Divergent Profile Kaviya sundar #1, Thanikaivel Murugan. D *2 # UG Degree holder, B.E. Aeronautical Engineering, Jeppiaar Engineering college, Chennai, India,

More information

Experimental Analysis on Vortex Tube Refrigerator Using Different Conical Valve Angles

Experimental Analysis on Vortex Tube Refrigerator Using Different Conical Valve Angles International Journal of Engineering Research and Development e-issn: 7-067X, p-issn: 7-00X, www.ijerd.com Volume 3, Issue 4 (August ), PP. 33-39 Experimental Analysis on Vortex Tube Refrigerator Using

More information

OPTIMIZATION OF RECUPERATER FIN GEOMETRY FOR MICRO GAS TURBINE

OPTIMIZATION OF RECUPERATER FIN GEOMETRY FOR MICRO GAS TURBINE OPTIMIZATION OF RECUPERATER FIN GEOMETRY FOR MICRO GAS TURBINE S.Ramamurthy 1 and Bharat Makwana 2 1 Scientist,National Aerospace Laboratories, Bangalore, ramamurthy_srm@yahoo.com 2 Engineer,INOX Private

More information

Fire safety of staircases in multi-storey buildings The results of measurements in Buildings and Simulations

Fire safety of staircases in multi-storey buildings The results of measurements in Buildings and Simulations Fire safety of staircases in multi-storey buildings The results of measurements in Buildings and Simulations Grzegorz Kubicki, Ph.D. Department of Environmental Engineering, Warsaw University of Technology

More information

SAFETY OF LABORATORIES FOR NEW HYDROGEN TECHNIQUES

SAFETY OF LABORATORIES FOR NEW HYDROGEN TECHNIQUES SAFETY OF LABORATORIES FOR NEW HYDROGEN TECHNIQUES Heitsch, M. 1, Baraldi, D. 2, Moretto, P. 3, Wilkening, H. 4 1 DG-JRC, Institute for Energy, Postbus 2, NL-1755 ZG Petten, Netherland, Matthias.Heitsch@ec.europa.eu

More information

Modelling the Output of a Flat-Roof Mounted Wind Turbine with an Edge Mounted Lip

Modelling the Output of a Flat-Roof Mounted Wind Turbine with an Edge Mounted Lip Modelling the Output of a Flat-Roof Mounted Wind Turbine with an Edge Mounted Lip S. J. Wylie 1, S. J. Watson 1, D. G. Infield 2 1 Centre for Renewable Energy Systems Technology, Department of Electronic

More information

WALL BOILING MODELING EXTENSION TOWARDS CRITICAL HEAT FLUX. ABSTRACT

WALL BOILING MODELING EXTENSION TOWARDS CRITICAL HEAT FLUX. ABSTRACT WALL BOILING MODELING EXTENSION TOWARDS CRITICAL HEAT FLUX C. Lifante 1, Th. Frank 1 and A. Burns 2,3 1 ANSYS Germany GmbH, Staudenfeldweg 12, 83624 Otterfing, Germany 2 ANSYS UK, 97 Milton Park, Abingdon,

More information

Applied Fluid Mechanics

Applied Fluid Mechanics Applied Fluid Mechanics 1. The Nature of Fluid and the Study of Fluid Mechanics 2. Viscosity of Fluid 3. Pressure Measurement 4. Forces Due to Static Fluid 5. Buoyancy and Stability 6. Flow of Fluid and

More information

Computational Analysis of the S Airfoil Aerodynamic Performance

Computational Analysis of the S Airfoil Aerodynamic Performance Computational Analysis of the 245-3S Airfoil Aerodynamic Performance Luis Velazquez-Araque and Jiří Nožička 2 Department of Mechanical Engineering National University of Táchira, San Cristóbal 5, Venezuela

More information

Numerical Simulation of Flow and Determination of Aerodynamic Forces in the Balanced Control Valve

Numerical Simulation of Flow and Determination of Aerodynamic Forces in the Balanced Control Valve EPJ Web of Conferences 45, 01062 (2013) DOI: 10.1051/ epjconf/ 20134501062 C Owned by the authors, published by EDP Sciences, 2013 Numerical Simulation of Flow and Determination of Aerodynamic Forces in

More information

Single Phase Pressure Drop and Flow Distribution in Brazed Plate Heat Exchangers

Single Phase Pressure Drop and Flow Distribution in Brazed Plate Heat Exchangers Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2016 Single Phase Pressure Drop and Flow Distribution in Brazed Plate Heat Exchangers

More information

Characterizing Flow Losses Occurring in Air Vents and Ejector Pins in High Pressure Die Castings

Characterizing Flow Losses Occurring in Air Vents and Ejector Pins in High Pressure Die Castings This paper is subject to revision. Statements and opinions advanced in this paper or during presentation are the author s and are his/her responsibility, not the Association s. The paper has been edited

More information

Numerical and Experimental Investigation of the Possibility of Forming the Wake Flow of Large Ships by Using the Vortex Generators

Numerical and Experimental Investigation of the Possibility of Forming the Wake Flow of Large Ships by Using the Vortex Generators Second International Symposium on Marine Propulsors smp 11, Hamburg, Germany, June 2011 Numerical and Experimental Investigation of the Possibility of Forming the Wake Flow of Large Ships by Using the

More information

Comparison of Methods and Devices for High Pressure Vessel Passivation B. Zitouni (1), L. Denies (1),M. Peukert (1)

Comparison of Methods and Devices for High Pressure Vessel Passivation B. Zitouni (1), L. Denies (1),M. Peukert (1) SPC2016_ 3124678 Comparison of Methods and Devices for High Pressure Vessel Passivation B. Zitouni (1), L. Denies (1),M. Peukert (1) (1) OHB System AG, Universitätsallee 27-29, 28359 Bremen, Germany Email:

More information

The Effect of Impeller Width on the Location of BEP in a Centrifugal Pump

The Effect of Impeller Width on the Location of BEP in a Centrifugal Pump The Effect of Impeller Width on the Location of BEP in a Centrifugal Pump Vinayak Manur 1, Sharanabasappa 2, M. S. Hebbal 3 P.G.Students, Department of Mechanical Engineering, Basaveshwar Engineering College,

More information

A Research on the Airflow Efficiency Analysis according to the Variation of the Geometry Tolerance of the Sirocco Fan Cut-off for Air Purifier

A Research on the Airflow Efficiency Analysis according to the Variation of the Geometry Tolerance of the Sirocco Fan Cut-off for Air Purifier A Research on the Airflow Efficiency Analysis according to the Variation of the Geometry Tolerance of the Sirocco Fan Cut-off for Air Purifier Jeon-gi Lee*, Choul-jun Choi*, Nam-su Kwak*, Su-sang Park*

More information

Gas Accumulation Potential & Leak Detection when Converting to Gas

Gas Accumulation Potential & Leak Detection when Converting to Gas Gas Accumulation Potential & Leak Detection when Converting to Gas Coal to Gas / PCUG Conference Chattanooga, TN October 29, 2013 Robert G. Mudry, P.E. Airflow Sciences Corporation Introduction Coal to

More information

Návrh vratného kanálu u dvoustupňového kompresoru Return channel design of the two stage compressor

Návrh vratného kanálu u dvoustupňového kompresoru Return channel design of the two stage compressor Návrh vratného kanálu u dvoustupňového kompresoru Return channel design of the two stage compressor J. Hrabovský, J. Vacula, M. Komárek L. K. Engineering, s.r.o C. Drápela, M. Vacek, J. Klíma PBS Turbo

More information

ISOLATION OF NON-HYDROSTATIC REGIONS WITHIN A BASIN

ISOLATION OF NON-HYDROSTATIC REGIONS WITHIN A BASIN ISOLATION OF NON-HYDROSTATIC REGIONS WITHIN A BASIN Bridget M. Wadzuk 1 (Member, ASCE) and Ben R. Hodges 2 (Member, ASCE) ABSTRACT Modeling of dynamic pressure appears necessary to achieve a more robust

More information

CFD Flow Analysis of a Refrigerant inside Adiabatic Capillary Tube

CFD Flow Analysis of a Refrigerant inside Adiabatic Capillary Tube CFD Flow Analysis of a Refrigerant inside Adiabatic Capillary Tube Y Raja Kumar ¹, Dr.P Usha sri ² PG Student¹, Associate professor² Department of Mechanical Engineering, University College of Engineering

More information

Development of virtual 3D human manikin with integrated breathing functionality

Development of virtual 3D human manikin with integrated breathing functionality SAT-9.2-2-HT-06 Development of virtual 3D human manikin with integrated breathing functionality Martin Ivanov Development of virtual 3D human manikin with integrated breathing functionality: The presented

More information

New Findings for the Application of Systems for Explosion- Isolation with Explosion Venting

New Findings for the Application of Systems for Explosion- Isolation with Explosion Venting 529 A publication of CHEMICAL ENGINEERING TRANSACTIONS VOL. 48, 2016 Guest Editors: Eddy de Rademaeker, Peter Schmelzer Copyright 2016, AIDIC Servizi S.r.l., ISBN 978-88-95608-39-6; ISSN 2283-9216 The

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

Numerical Simulations of a Train of Air Bubbles Rising Through Stagnant Water

Numerical Simulations of a Train of Air Bubbles Rising Through Stagnant Water Numerical Simulations of a Train of Air Bubbles Rising Through Stagnant Water Hong Xu, Chokri Guetari ANSYS INC. Abstract Transient numerical simulations of the rise of a train of gas bubbles in a liquid

More information

Two phase discharge flow prediction in safety valves

Two phase discharge flow prediction in safety valves Dempster W, Elmayyah W/ ICPVT-13 1 Two phase discharge flow prediction in safety valves William Dempster a, Wael Elmayyah b a Department of Mechanical and Aerospace Engineering, University of Strathclyde,

More information

Investigation on 3-D Wing of commercial Aeroplane with Aerofoil NACA 2415 Using CFD Fluent

Investigation on 3-D Wing of commercial Aeroplane with Aerofoil NACA 2415 Using CFD Fluent Investigation on 3-D of commercial Aeroplane with Aerofoil NACA 2415 Using CFD Fluent Rohit Jain 1, Mr. Sandeep Jain 2, Mr. Lokesh Bajpai 3 1PG Student, 2 Associate Professor, 3 Professor & Head 1 2 3

More information

Deborah Houssin-Agbomson, Jean-Yves Letellier, Philippe Renault, Simon Jallais

Deborah Houssin-Agbomson, Jean-Yves Letellier, Philippe Renault, Simon Jallais AN EXPERIMENTAL STUDY DEDICATED TO WIND INFLUENCE ON HELIUM BUILD-UP AND CONCENTRATION DISTRIBUTION INSIDE A 1-M 3 SEMI-CONFINED ENCLOSURE CONSIDERING HYDROGEN ENERGY APPLICATIONS CONDITIONS OF USE. Deborah

More information

CFD Analysis ofwind Turbine Airfoil at Various Angles of Attack

CFD Analysis ofwind Turbine Airfoil at Various Angles of Attack IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-issn: 2278-1684,p-ISSN: 2320-334X, Volume 13, Issue 4 Ver. II (Jul. - Aug. 2016), PP 18-24 www.iosrjournals.org CFD Analysis ofwind Turbine

More information

The Mechanism Study of Vortex Tools Drainage Gas Recovery of Gas Well

The Mechanism Study of Vortex Tools Drainage Gas Recovery of Gas Well Advances in Petroleum Exploration and Development Vol. 7, No. 1, 214, pp. 62-66 DOI:1.3968/j.aped.1925543821471.1931 ISSN 1925-542X [Print] ISSN 1925-5438 [Online] www.cscanada.net www.cscanada.org The

More information

A STUDY ON AIRFOIL CHRACTERISTICS OF A ROTOR BLADE FOR WIND MILL

A STUDY ON AIRFOIL CHRACTERISTICS OF A ROTOR BLADE FOR WIND MILL A STUDY ON AIRFOIL CHRACTERISTICS OF A ROTOR BLADE FOR WIND MILL Dhatchanamurthy.P 1, Karthikeyan.L.M 2, Karthikeyan.R 3 1 Department of Aeronautical Engineering, Kathir College of Engineering (India)

More information

CFD Study of Solid Wind Tunnel Wall Effects on Wing Characteristics

CFD 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 information

You should be able to: Describe Equipment Barometer Manometer. 5.1 Pressure Read and outline 5.1 Define Barometer

You should be able to: Describe Equipment Barometer Manometer. 5.1 Pressure Read and outline 5.1 Define Barometer A P CHEMISTRY - Unit 5: Gases Unit 5: Gases Gases are distinguished from other forms of matter, not only by their power of indefinite expansion so as to fill any vessel, however large, and by the great

More information

A COMPARATIVE STUDY OF MIX FLOW PUMP IMPELLER CFD ANALYSIS AND EXPERIMENTAL DATA OF SUBMERSIBLE PUMP

A COMPARATIVE STUDY OF MIX FLOW PUMP IMPELLER CFD ANALYSIS AND EXPERIMENTAL DATA OF SUBMERSIBLE PUMP IMPACT: International Journal of Research in Engineering & Technology (IMPACT: IJRET) ISSN 2321-8843 Vol. 1, Issue 3, Aug 2013, 57-64 Impact Journals A COMPARATIVE STUDY OF MIX FLOW PUMP IMPELLER CFD ANALYSIS

More information

OPTIMIZATION OF INERT GAS FLOW INSIDE LASER POWDER BED FUSION CHAMBER WITH COMPUTATIONAL FLUID DYNAMICS. Abstract. Introduction

OPTIMIZATION OF INERT GAS FLOW INSIDE LASER POWDER BED FUSION CHAMBER WITH COMPUTATIONAL FLUID DYNAMICS. Abstract. Introduction Solid Freeform Fabrication 2018: Proceedings of the 29th Annual International Solid Freeform Fabrication Symposium An Additive Manufacturing Conference OPTIMIZATION OF INERT GAS FLOW INSIDE LASER POWDER

More information

Free Surface Flow Simulation with ACUSIM in the Water Industry

Free Surface Flow Simulation with ACUSIM in the Water Industry Free Surface Flow Simulation with ACUSIM in the Water Industry Tuan Ta Research Scientist, Innovation, Thames Water Kempton Water Treatment Works, Innovation, Feltham Hill Road, Hanworth, TW13 6XH, UK.

More information

Measurement and simulation of the flow field around a triangular lattice meteorological mast

Measurement and simulation of the flow field around a triangular lattice meteorological mast Measurement and simulation of the flow field around a triangular lattice meteorological mast Matthew Stickland 1, Thomas Scanlon 1, Sylvie Fabre 1, Andrew Oldroyd 2 and Detlef Kindler 3 1. Department of

More information

AIRFLOW AND TEMPERATURE FIELD CALCULATIONS FOR WINTER SPORTS FACILITIES

AIRFLOW AND TEMPERATURE FIELD CALCULATIONS FOR WINTER SPORTS FACILITIES AIRFLOW AND TEMPERATURE FIELD CALCULATIONS FOR WINTER SPORTS FACILITIES Andrea Frisque* Stantec Consulting, Vancouver BC V6B6A3, Canada Rowan, Williams, Davies & Irwin (RWDI), Vancouver, BC, V5Z 1K5, Canada**

More information

Surrounding buildings and wind pressure distribution on a high rise building

Surrounding 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 information

THE EFFECT OF PLAN SIZE IN WIND CATCHER ON ITS VENTILATION RATE

THE EFFECT OF PLAN SIZE IN WIND CATCHER ON ITS VENTILATION RATE THE EFFECT OF PLAN SIZE IN WIND CATCHER ON ITS VENTILATION RATE 1 MARYAM HOSSEIN GHADIRI, 2 MAHMUD DEHNAVI 1 Department of Architecture, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran 2 Department

More information

Analysis of Pressure Rise During Internal Arc Faults in Switchgear

Analysis of Pressure Rise During Internal Arc Faults in Switchgear Analysis of Pressure Rise During Internal Arc Faults in Switchgear ASANUMA, Gaku ONCHI, Toshiyuki TOYAMA, Kentaro ABSTRACT Switchgear include devices that play an important role in operations such as electric

More information

CFD ANALYSIS TO INVESTIGATE THE EFFECT OF AXIAL SPACING IN A SINGLE STAGE TRANSONIC AXIAL FLOW COMPRESSOR

CFD ANALYSIS TO INVESTIGATE THE EFFECT OF AXIAL SPACING IN A SINGLE STAGE TRANSONIC AXIAL FLOW COMPRESSOR Symposium on Applied Aerodynamics and Design of Aerospace Vehicle (SAROD 2011) November 16-18, 2011, Bangalore, India CFD ANALYSIS TO INVESTIGATE THE EFFECT OF AXIAL SPACING IN A SINGLE STAGE TRANSONIC

More information

PhD student, January 2010-December 2013

PhD student, January 2010-December 2013 Numerical modeling of wave current interactions ata a local scaleand and studyof turbulence closuremodel effects MARIA JOÃO TELES PhD student, January 2010-December 2013 Supervisor: António Pires-Silva,

More information

Analysis of pressure losses in the diffuser of a control valve

Analysis of pressure losses in the diffuser of a control valve Analysis of pressure losses in the diffuser of a control valve Petr Turecký 1, Lukáš Mrózek 2*, Ladislav Taj 2, and Michal Kolovratník 3 1 ENVIROS, s.r.o., Dykova 53/10, 101 00 Praha 10-Vinohrady, Czech

More information

I.CHEM.E. SYMPOSIUM SERIES NO. 97 BUOYANCY-DRIVEN NATURAL VENTILATION OP ENCLOSED SPACES

I.CHEM.E. SYMPOSIUM SERIES NO. 97 BUOYANCY-DRIVEN NATURAL VENTILATION OP ENCLOSED SPACES BUOYANCY-DRIVEN NATURAL VENTILATION OP ENCLOSED SPACES M. R. Marshall* and P. L. Stewart-Darling* A simple mathematical model for the buoyancy driven ventilation of an enclosed space, using a two-pipe

More information

ENVIRONMENTAL AND POLLUTANTS GAS ANALYZERS

ENVIRONMENTAL AND POLLUTANTS GAS ANALYZERS XIX IMEKO World Congress Fundamental and Applied Metrology September 6, 9, Lisbon, Portugal ENVIRONMENTAL AND POLLUTANTS GAS ANALYZERS Ana Madeira, Florbela A. Dias and Eduarda Filipe 3 Instituto Português

More information

THE WAY THE VENTURI AND ORIFICES WORK

THE WAY THE VENTURI AND ORIFICES WORK Manual M000 rev0 03/00 THE WAY THE VENTURI AND ORIFICES WORK CHAPTER All industrial combustion systems are made up of 3 main parts: ) The mixer which mixes fuel gas with combustion air in the correct ratio

More information

Influence 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 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 information

Proceedings of the ASME th Biennial Conference on Engineering Systems Design and Analysis ESDA2014 June 25-27, 2014, Copenhagen, Denmark

Proceedings of the ASME th Biennial Conference on Engineering Systems Design and Analysis ESDA2014 June 25-27, 2014, Copenhagen, Denmark Proceedings of the ASME 2014 12th Biennial Conference on Engineering Systems Design and Analysis ESDA2014 June 25-27, 2014, Copenhagen, Denmark ESDA2014-20042 UNSTEADY FLOW SIMULATION IN SUCTION MUFFLER

More information

Study on the Influencing Factors of Gas Mixing Length in Nitrogen Displacement of Gas Pipeline Kun Huang 1,a Yan Xian 2,b Kunrong Shen 3,c

Study on the Influencing Factors of Gas Mixing Length in Nitrogen Displacement of Gas Pipeline Kun Huang 1,a Yan Xian 2,b Kunrong Shen 3,c Applied Mechanics and Materials Online: 2013-06-13 ISSN: 1662-7482, Vols. 321-324, pp 299-304 doi:10.4028/www.scientific.net/amm.321-324.299 2013 Trans Tech Publications, Switzerland Study on the Influencing

More information

Reflux Condensation with Various Non-Condensable Gases

Reflux Condensation with Various Non-Condensable Gases Proceedings of the 3 rd World Congress on Mechanical, Chemical, and Material Engineering (MCM'17) Rome, Italy June 8 10, 2017 Paper No. HTFF 168 ISSN: 2369-8136 DOI: 10.11159/htff17.168 Reflux Condensation

More information

CYCLE ANALYSIS OF LINEAR COMPRESSORS USING THREE- DIMENSIONAL CFD

CYCLE ANALYSIS OF LINEAR COMPRESSORS USING THREE- DIMENSIONAL CFD CYCLE ANALYSIS OF LINEAR COMPRESSORS USING THREE- DIMENSIONAL CFD I. Y. An and Y. L. Lee Department of Mechanical Engineering, Kongju National University, Korea E-Mail: ylee@kongju.ac.kr ABSTRACT In order

More information

Aerodynamic study of a cyclist s moving legs using an innovative approach

Aerodynamic study of a cyclist s moving legs using an innovative approach Aerodynamic study of a cyclist s moving legs using an innovative approach Francesco Pozzetti 30 September 2017 Abstract During a period of four weeks in September, I completed a research project in fluid

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

Numerical Computations of Wind Turbine Wakes Using Full Rotor Modeling

Numerical Computations of Wind Turbine Wakes Using Full Rotor Modeling 2012 2nd International Conference on Power and Energy Systems (ICPES 2012) IPCSIT vol. 56 (2012) (2012) IACSIT Press, Singapore DOI: 10.7763/IPCSIT.2012.V56.21 Numerical Computations of Wind Turbine Wakes

More information

Numerical Simulation And Aerodynamic Performance Comparison Between Seagull Aerofoil and NACA 4412 Aerofoil under Low-Reynolds 1

Numerical Simulation And Aerodynamic Performance Comparison Between Seagull Aerofoil and NACA 4412 Aerofoil under Low-Reynolds 1 Advances in Natural Science Vol. 3, No. 2, 2010, pp. 244-20 www.cscanada.net ISSN 171-7862 [PRINT] ISSN 171-7870 [ONLINE] www.cscanada.org *The 3rd International Conference of Bionic Engineering* Numerical

More information

Finding leaks in Main Cryogenic Heat Exchangers without shutdown

Finding leaks in Main Cryogenic Heat Exchangers without shutdown Finding leaks in Main Cryogenic Heat Exchangers without shutdown Liquefaction is the most fundamental step in the LNG production process. To achieve this there are several process solutions available,

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

*MAT GAS MIXTURE, a new gas mixture model for airbag applications

*MAT GAS MIXTURE, a new gas mixture model for airbag applications 4 th European LS-DYNA Users Conference Occupant III / Airbag *MAT GAS MIXTURE, a new gas mixture model for airbag applications Author: Lars Olovsson LSTC Correspondence: tel/fax: +46-852 030 881 e-mail:

More information

Design of a small-scaled de Laval nozzle for IGLIS experiment

Design of a small-scaled de Laval nozzle for IGLIS experiment Design of a small-scaled de Laval nozzle for IGLIS experiment Evgeny Mogilevskiy, R. Ferrer, L. Gaffney, C. Granados, M. Huyse, Yu. Kudryavtsev, S. Raeder, P. Van Duppen Instituut voor Kern- en Stralingsfysika,

More information

COMPUTATIONAL FLOW MODEL OF WESTFALL'S LEADING TAB FLOW CONDITIONER AGM-09-R-08 Rev. B. By Kimbal A. Hall, PE

COMPUTATIONAL FLOW MODEL OF WESTFALL'S LEADING TAB FLOW CONDITIONER AGM-09-R-08 Rev. B. By Kimbal A. Hall, PE COMPUTATIONAL FLOW MODEL OF WESTFALL'S LEADING TAB FLOW CONDITIONER AGM-09-R-08 Rev. B By Kimbal A. Hall, PE Submitted to: WESTFALL MANUFACTURING COMPANY September 2009 ALDEN RESEARCH LABORATORY, INC.

More information

Development of Fluid-Structure Interaction Program for the Mercury Target

Development of Fluid-Structure Interaction Program for the Mercury Target Chapter 4 Epoch Making Simulation Development of Fluid-Structure Interaction Program for the Mercury Target Project Representative Chuichi Arakawa Authors Chuichi Arakawa Takuma Kano Ryuta Imai Japan Atomic

More information