Experimental and numerical investigation on opposing plasma synthetic jet for drag reduction

作     者：Wei XIE Zhenbing LUO Yan ZHOU Wenqiang PENG Qiang LIU Dengpan WANG Wei XIE;Zhenbing LUO;Yan ZHOU;Wenqiang PENG;Qiang LIU;Dengpan WANG

作者机构：College of Aerospace EngineeringNational University of Defense TechnologyChangsha 410073China Beijing Special Engineering Design and Research InstituteBeijing 100000China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2022年第35卷第8期

页      面：75-91页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：co-supported by the National Natural Science Foundation of China(Nos.52075538,12002377,11872374) the Natural Science Foundation of Hunan Province,China(Nos.2020JJ5670,2020JJ2031) the research program of National University of Defense Technology(No.ZK18-03-11) China Postdoctoral Science Foundation(No.2019M652754)。 

主　　题：Drag reduction Opposing jet Parameter study Plasma synthetic jet(PSJ) Supersonic flow 

摘      要：Experimental and numerical studies are carried out to validate the potential of opposing Plasma Synthetic Jet(PSJ)for drag reduction for a hemisphere.Firstly,flow field changes of opposing PSJ are analyzed by comparing the experimental schlieren images and simulation results in a supersonic free stream of Mach number 3.As PSJ is a kind of unsteady pulsed jet,the shock standoff distance increases initially and then decreases under the control of PSJ,which corresponds to the change of the strength of PSJ.Accordingly,the amount of drag reduction of the hemisphere increases initially and then decreases.It is found that there is a short period of“drag riseduring the formation of PSJ before the drag reduction,which is induced by the generation of normal shock waves and the area difference of the cavity wall of PSJ Actuator(PSJA).Secondly,the effects of five parameters,including exit diameter,discharge energy of PSJA,Mach number,static pressure of incoming flow and angle of attack,on drag reduction of opposing PSJ were studied in detail by using numerical method.It is found that the Maximum Pressure Ratio(MPR)has a significant impact on the average drag reduction for a configuration-determined PSJA.For the configuration selected in this study,the flow field of opposing PSJ shows typical Short Penetration Mode(SPM)in a control cycle of PSJ when the MPR is less than 0.89.However,the flow field shows typical Long Penetration Mode(LPM)at some time when the MPR is bigger than 0.89.Relatively better drag reduction is achieved in this case.