等离子体激励控制圆柱绕流的大涡模拟研究  

Large Eddy Simulation of Plasma Actuation to Control Flow Around a Cylinder

作　　者：赖晨光[1] 付航 凌志伟 贾浩 周毓婷 LAI Chenguang;FU Hang;LING Zhiwei;JIA Hao;ZHOU Yuting(Key Laboratory of Advanced Manufacture Technology for Automobile Parts(Chongqing University of Technology),Ministry of Education,Chongqing 400054,China;College of Vehicle Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]汽车零部件先进制造技术教育部重点实验室(重庆理工大学),重庆400054 [2]重庆理工大学车辆工程学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2021年第8期81-89,共9页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(51305477)。

摘　　要：基于非对称布局表面介质阻挡放电(SDBD)等离子体气动激励主动流动控制技术及大涡数值模拟方法,探究等离子体气动激励对亚临界雷诺数范围内三维无限长圆柱绕流气流分离的控制,进而改善圆柱绕流气动特性。在固定等离子体激励器激励参数条件下,探究了不同来流雷诺数和等离子体激励器安装位置对流动控制效果的影响,并通过分析在等离子体流动控制下圆柱绕流分离区流场结构的变化,揭示了其控制机理。研究结果表明:在所研究的雷诺数范围内施加等离子体流动控制对抑制圆柱绕流分离均有一定的控制效果,在3900雷诺数下几乎可以完全抑制流动分离,但随着来流雷诺数的增加,控制效果会逐渐减弱,当来流雷诺数达到30000时,几乎没有控制效果;在较低雷诺数条件下,激励器的安装位置对流动控制效果影响明显,其安装位置在靠近尾流分离区的控制效果明显好于安装位置在流动分离之前的位置。This paper is based on the asymmetrical layout surface dielectric barrier discharge(SDBD)plasma aerodynamic actuation active flow control technology and large eddy numerical simulation method to explore the control of plasma aerodynamic actuation on the flow separation of a three-dimensional infinite cylinder in the subcritical Reynolds number range,in order to improve the aerodynamic characteristics of the flow around the cylinder.Under the condition of fixed actuation parameters,the effects of different Reynolds numbers and actuator positions on the plasma flow control effect are studied.The changes in the flow field structure of the flow separation zone around the cylinder under the plasma flow control are analyzed to reveal its drag reduction mechanism.The research results show that the plasma flow control has a specific control effect within the studied Reynolds number range,but as the Reynolds number increases,the control effect will gradually weaken.Under the condition of 3900 Reynolds number,the installation position of the actuator has a significant impact on the flow control effect.The control effect of the installation position near the wake separation zone is obviously better than that of the installation position before the flow separation.

关 键 词：圆柱绕流 亚临界雷诺数 大涡模拟 流动控制 等离子体 

分 类 号：U461.1[机械工程—车辆工程]