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On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel

Publish place: Journal of Applied Fluid Mechanics، Vol: 12، Issue: 5
Publish Year: 1398
Type: Journal paper
Language: English
View: 178

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Link to this Paper:
https://civilica.com/doc/1369617

Document National Code:

JR_JAFM-12-5_001

Index date: 5 January 2022

On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel abstract

In the present research, a possible generation mechanism of low-frequency buffeting phenomenon based on a 1:15 open jet automotive wind tunnel was investigated. Evolution of vortex structures and pressure field in the plenum chamber have been visualized and analyzed by Large-eddy simulation (LES). It is shown that the low frequency pressure fluctuation is caused by the large-scale structures and their interaction. Multiple proper orthogonal decomposition was adopted to analyze the flow field in the plenum chamber. The characteristic frequencies of the vortex-rings after pairing is the same as the dominant resonance of buffeting at this wind velocity.

On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel Keywords:

Buffeting , Wind tunnel , LES , PIV , POD

On the Low Frequency Pressure Fluctuation in a 3/4 Open Jet Automotive Wind Tunnel authors

Q. Jia

Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, ۲۰۱۸۰۴, China

Y. Zhu

Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, ۲۰۱۸۰۴, China

D. Bao

Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai, ۲۰۱۸۰۴, China

M. M. Rashidi

Department of Civil Engineering, School of Engineering, University of Birmingham, Edgbaston, Birmingham, B۱۵ ۲TT, United Kingdom

Z. Yang

Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai, ۲۰۱۸۰۴, China