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on the low frequency pressure fluctuation in a 3/4 open jet automotive wind tunnel
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نویسنده
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jia q. ,zhu y. ,bao d. ,rashidi m. m. ,yang z.
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منبع
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journal of applied fluid mechanics - 2019 - دوره : 12 - شماره : 5 - صفحه:1359 -1369
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چکیده
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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.
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کلیدواژه
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wind tunnel ,buffeting ,les ,piv ,pod
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آدرس
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tongji university, shanghai automotive wind tunnel center, china. shanghai key lab of vehicle aerodynamics and vehicle thermal management systems, china, tongji university, shanghai automotive wind tunnel center, china. shanghai key lab of vehicle aerodynamics and vehicle thermal management systems, china, tongji university, shanghai automotive wind tunnel center, china. shanghai key lab of vehicle aerodynamics and vehicle thermal management systems, china, university of birmingham, school of engineering, department of civil engineering, uk, tongji university, shanghai automotive wind tunnel center, china. shanghai key lab of vehicle aerodynamics and vehicle thermal management systems, china
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پست الکترونیکی
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zhigangyang@tongji.edu.cn
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Authors
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