Turbulent drag reduction by spanwise slot blowing pulsed plasma actuation  

作　　者：Borui ZHENG Yuanzhong JIN Minghao YU Yueqiang LI Bin WU Quanlong CHEN 郑博睿;金元中;喻明浩;李跃强;武斌;陈全龙(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,People’s Republic of China;Department of Aeronautics and Astronautics,Northwestern Polytechnical University,Xi’an 710072,People’s Republic of China;The Green Aerotechnics Research Institute of Chongqing Jiaotong University,Chongqing 401120,People’s Republic of China)

机构地区：[1]School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,People’s Republic of China [2]Department of Aeronautics and Astronautics,Northwestern Polytechnical University,Xi’an 710072,People’s Republic of China [3]The Green Aerotechnics Research Institute of Chongqing Jiaotong University,Chongqing 401120,People’s Republic of China

出　　处：《Plasma Science and Technology》2022年第11期26-36,共11页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.61971345 and 12175177);the Foundation for Key Laboratories of National Defense Science and Technology of China(No.614220120030810).

摘　　要：This work studies the turbulent drag reduction(TDR)effect of a flat plate model using a spanwise slot blowing pulsed plasma actuator(SBP-PA).Wind tunnel experiments are carried out under a Reynolds number of 1.445×10^(4).Using a hot-wire anemometer and an electrical data acquisition system,the influences of millisecond pulsed plasma actuation with different burst frequencies and duty cycles on the microscale coherent structures near the wall of the turbulent boundary layer(TBL)are studied.The experimental results show that the SBP-PA can effectively reduce the frictional drag of the TBL.When the duty cycle exceeds 30%,the TDR rate is greater than 11%,and the optimal drag reduction rate of 13.69%is obtained at a duty cycle of 50%.Furthermore,optimizing the electrical parameters reveals that increasing the burst frequency significantly reduces the velocity distribution in the logarithmic region of the TBL.When the normalized burst frequency reaches f+=2πf_(p)d/U_(∞)=7.196,the optimal TDR effectiveness is 16.97%,indicating a resonance phenomenon between the pulsed plasma actuation and the microscale coherent structures near the wall.Therefore,reasonably selecting the electrical parameters of the plasma actuator is expected to significantly improve the TDR effect.

关 键 词：turbulent boundary layer control plasma flow control HOT-WIRE turbulent frictional drag turbulent drag reduction 

分 类 号：O533[理学—等离子体物理]