基于等离子体流动控制的方背式汽车模型减阻研究*

doi:10.19562/j.chinasae.qcgc.2020.06.007

Abstract

Abstract: The control effects of the surface dielectric barrier discharge-based plasma actuator on the wake flow separation of squire-back Ahmed model are studied by wind tunnel test in this paper. Firstly, the aerodynamic characteristics of ion wind induced by plasma actuator under static state environment are revealed through particle image velocimetry. Then according to the changes in the surface pressure and wake flow field of the model, the drag reduction rates of the model at different actuating voltages are analyzed with the mechanism of drag reduction expounded: plasma actuator can effectively control wake flow, increasing the wake pressure and hence leading to the reduction of aerodynamic drag. Test results show that the control effects of actuator weaken with the rise of wind speed and the induced speed of actuator reaches maximum at a peak voltage of 17 kV. Thus, the best drag reduction effect is achieved in a condition of a wind speed of 10 m/s and a peak voltage of 17 kV with an active drag reduction rate of -4.58% and a total drag reduction rate of -9.02%

Key words: vehicle aerodynamics, active drag reduction, surface dielectric barrier discharge, plasma flow control, wind tunnel test

Wang Jingyu, Geng Yalin, Hui Zheng, Hu Xingjun, Li Tianhong, Liu Zicheng, Li Jiuchao. Study on Drag Reduction of Square-back AhmedModel Based on Plasma Flow Control[J].Automotive Engineering, 2020, 42(6): 753-758.

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Study on Drag Reduction of Square-back AhmedModel Based on Plasma Flow Control

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