Aerodynamic Sensitivity Analysis Of The New EMUV250 Train To Cross Wind By Wind Tunnel Test And CFD Analysis

2008 ◽  
pp. 766-766
Author(s):  
F. Cheli ◽  
G. Diana ◽  
F. Ripamonti ◽  
G. Tomasini ◽  
G. Zanetti
Keyword(s):  
Sensitivity Analysis ◽  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Cfd Analysis

Performance Test and Simulation Study on the Air Path of CAP1400 Passive Containment Cooling System

2017 ◽  
Author(s):  
Pan Xinxin ◽  
Huang Jingyu ◽  
Song Chunjing
Keyword(s):  
Wind Speed ◽  
Wind Tunnel ◽  
Air Flow ◽  
Wind Tunnel Test ◽  
Flow Path ◽  
Leeward Side ◽  
Wind Condition ◽  
Cfd Analysis ◽  
Test Results ◽  
Gradient Wind

As a large scale passive pressurized water reactor nuclear power plant, CAP1400 can remove the reactor decay heat to outside containment with the air cooling in the air flow path of passive containment cooling system (PCS) during the long-term period following an accident. Flow resistance characteristic and wind neutrality characteristic are the main performances of PCS air flow path. In order to study the performance of PCS air flow path, it is necessary to carry out the PCS wind tunnel test and computational fluid dynamics (CFD) analysis to establish a suitable method for the analysis of the performance of the air flow path. This paper comes up simulating the internal pressure and velocity distribution in the air flow path under different wind speed through CAP1400 PCS 1:100 scaled air flow path wind tunnel test to research the air flow resistance and internal flow pattern. The test shows that local uneven flow phenomenon exists in the outer annulus of the air flow path, but the wind pressure distribution of inner annulus is not affected by environment wind speed, wind direction angle, landforms and the surrounding buildings. The wind pressure is uniform at different heights on the cross section and shows the neutrality feature. Combining with CAP1400 PCS wind tunnel test, the CFD model is built. The measured inlet wind speed, turbulent kinetic energy and turbulent dissipation rate distribution parameters are inputs and the uniform wind conditions and gradient wind conditions of simulation analysis are developed. Simulation results show that: 1) In uniform wind condition, simulation result of pressure coefficient distribution trend at each cross section is consistent with the test trend and the deviation is very small, which basically can be controlled below 5%. The simulated differential pressures between inner annulus and outer annulus at different elevation are basically identical with the test results, which increase as the elevation arises. The simulated velocity distribution is basically identical with the test. The wind velocity at the upwind and central area of the flow path outlet is larger than other area, and a large swirling region comes on the leeward side near the wall 15cm, but simulated swirling region size at leeward side is slightly smaller. 2) In gradient wind condition, the pressure coefficient distribution trends are basically identical, and the deviation between the test and CFD analysis is 5–10% approximately. Considering the stability of gradient wind condition in wind tunnel is worse than that of uniform wind conditions, and more prone to wind speed fluctuations, therefore, the deviation is slightly greater than the uniform wind condition. According to the CFD simulation and wind tunnel test, it can be found that the simulation of air flow inside and outside annulus has a high precision though the test results are slightly affected by the instrument tubes along the two sides of test model. In general, CFD simulation and wind tunnel test results are basically identical. Therefore, CFD analysis method is well verified by PCS wind tunnel test, which can be applied to the analysis of the actual power plant.

1181 WIND TUNNEL TEST OF BUTTERFLY WIND TURBINE AND 2D-CFD ANALYSIS OF DOUBLE BLADE ROTOR

2013 ◽  
Vol 2013.4 (0) ◽  
pp. _1181-1_-_1181-6_
Author(s):  
HARA Yutaka ◽  
SUMI Takahiro ◽  
EMI Takanori ◽  
WAKIMOTO Mutsuko ◽  
AKIMOTO Hiromichi ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Wind Turbine ◽  
Wind Tunnel Test ◽  
Cfd Analysis

scholarly journals Design and Performance Evaluation of Propeller for Solar-Powered High-Altitude Long-Endurance Unmanned Aerial Vehicle

2018 ◽  
Vol 2018 ◽  
pp. 1-23 ◽  
Author(s):  
Donghun Park ◽  
Yunggyo Lee ◽  
Taehwan Cho ◽  
Cheolwan Kim
Keyword(s):  
Wind Tunnel ◽  
High Altitude ◽  
Test Data ◽  
Design Method ◽  
Wind Tunnel Test ◽  
Flight Test ◽  
Cfd Analysis ◽  
Aerial Vehicle ◽  
Solar Powered ◽  
Long Endurance

Design, wind tunnel test, computational fluid dynamics (CFD) analysis, and flight test data analysis are conducted for the propeller of EAV-3, which is a solar-powered high-altitude long-endurance unmanned aerial vehicle developed by Korea Aerospace Research Institute. The blade element momentum theory, in conjunction with minimum induced loss, is used as a basic design method. Airfoil data are obtained from CFD analysis, which takes into account the low Reynolds number effect. The response surface is evaluated for design variables by using design of experiment and kriging metamodel. The optimization is based on desirability function. A wind tunnel test is conducted on the designed propeller. Numerical analyses are performed by using a commercial CFD code, and results are compared with those obtained from the design code and wind tunnel test data. Flight test data are analyzed based on several approximations and assumptions. The propeller performance is in good agreement with the numerical and measurement data in terms of tendency and behavior. The comparison of data confirms that the design method, wind tunnel test, and CFD analysis used in this study are practically useful and valid for the development of a high-altitude propeller.

Optimization of Local Body Shape about A Minibus Based on CFD and Wind Tunnel Test

2013 ◽  
Vol 318 ◽  
pp. 257-262
Author(s):  
Liang Jiang ◽  
Zhi Cheng He ◽  
Tao Chen
Keyword(s):  
Wind Tunnel ◽  
Drag Coefficient ◽  
Body Shape ◽  
Engineering Application ◽  
Wind Tunnel Test ◽  
Optimization Method ◽  
Development Stage ◽  
Cfd Analysis ◽  
Local Flow ◽  
Local Body

In the development stage of a domestic minibus styling, the detail optimization method was used to make some changes about the car body for the purpose to get much lower value of drag coefficient combined with the detailed flow field messages reflected by the CFD analysis and wind tunnel liquid display test. Also this paper discussed the local flow structure specially, as well as the different changes of drag coefficient. The study shows that detail changes of body shape based on CFD analysis and wind tunnel liquid display test can obviously reduce the drag coefficient and optimize the aerodynamic characteristic of the minibus, which provides object basis for minibus, and also have a meaningful value in engineering application in the future.

Model Design and Pre-Test CFD Analysis for a Supersonic Retropropulsion Wind Tunnel Test

2020 ◽  
Author(s):  
Karl T. Edquist ◽  
Ashley M. Korzun ◽  
William L. Kleb ◽  
Veronica Hawke ◽  
Yehia M. Rizk ◽  
...  
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Cfd Analysis ◽  
Model Design ◽  
Supersonic Retropropulsion

CFD Analysis and Wind Tunnel Testing of Human Powered Vehicle Drag Coefficients

2021 ◽  
Author(s):  
Tony Estrada ◽  
Kevin R. Anderson ◽  
Ivan Gundersen ◽  
Chuck Johnston
Keyword(s):  
Wind Tunnel ◽  
Drag Coefficient ◽  
Wind Tunnel Test ◽  
Cfd Modeling ◽  
Wind Tunnel Testing ◽  
Cfd Analysis ◽  
Drag Coefficients ◽  
Drag Forces ◽  
Human Powered ◽  
Tunnel Testing

Abstract This paper presents results of Computational Fluid Dynamics (CFD) modeling and experimental wind tunnel testing to predict the drag coefficient for a Human Powered Vehicle (HPV) entered in the World Human Powered Speed Challenge (WHPSC). Herein, a comparison of CFD to wind tunnel test data is presented for ten different HPV designs. The current study reveals that streamlining the nose cone, tail cone, and wheel housing allows for a reduction of drag forces in critical areas, and a reduced drag coefficient. This allows for a selection to be made during the design phase, prior to manufacturing. Drag coefficients were found to be in the range of 0.133 < CD < 0.273, depending on the type of HPV considered. Wind tunnel testing was performed on scale models of the HPV showing agreement to the CFD results on average to within 16%. The wind tunnel testing showed a 7.7% decrease in drag coefficient from the baseline HPV of 2019 to the baseline HPV of 2020. Thus, the wind tunnel data supported by CFD analysis was used to assist in the design of the HPV.

Response and Operational Modal Analysis from Wind Tunnel Test of the EOLO Flexible Aircraft

2021 ◽  
Author(s):  
David F. Castillo Zuñiga ◽  
Alain Giacobini Souza ◽  
Roberto G. da Silva ◽  
Luiz Carlos Sandoval Góes
Keyword(s):  
Wind Tunnel ◽  
Modal Analysis ◽  
Wind Tunnel Test ◽  
Operational Modal Analysis ◽  
Flexible Aircraft

DEVELOPMENT OF A RAPID PROTOTYPING METHODOLOGY FOR WIND TUNNEL TEST MODEL DESIGN

2019 ◽  
Author(s):  
Bruno Ricardo Massucatto Padilha ◽  
Guilherme Barufaldi ◽  
ROBERTO GIL ANNES DA SILVA
Keyword(s):  
Wind Tunnel ◽  
Rapid Prototyping ◽  
Wind Tunnel Test ◽  
Test Model ◽  
Model Design

Rancang Bangun Piranti Lunak Pengolah Data Pasca Pengujian Terowongan Angin Kecepatan Rendah Indonesia

2016 ◽  
Vol 7 (2) ◽  
pp. 131-138
Author(s):  
Ivransa Zuhdi Pane
Keyword(s):  
Wind Tunnel ◽  
Wind Tunnel Test ◽  
Test Results ◽  
Effective Solution ◽  
Post Processing ◽  
Prototype Development ◽  
Design Activities ◽  
Index Terms ◽  
Test Objects ◽  
Processing Requirement

Data post-processing plays important roles in a wind tunnel test, especially in supporting the validation of the test results and further data analysis related to the design activities of the test objects. One effective solution to carry out the data post-processing in an automated productive manner, and thus eliminate the cumbersome conventional manual way, is building a software which is able to execute calculations and have abilities in presenting and analyzing the data in accordance with the post-processing requirement. Through several prototype development cycles, this work attempts to engineer and realize such software to enhance the overall wind tunnel test activities. Index Terms—software engineering, wind tunnel test, data post-processing, prototype, pseudocode

Sign in / Sign up

Export Citation Format

Share Document