磁加速等离子体激励器激励特性

为了增强等离子体激励器的扰动能力、提升等离子体气动激励的控制效果，采用高压探针、烟流显示和PIV流场测试等多种研究手段，开展了磁场加速等离子体激励器特性研究，获得了激励器不同时刻的放电图像，分析了磁场强度对激励器电学特性与诱导流场特性的影响规律.结果表明，（1）放电等离子体的定向运动速度与磁场强度成正比，磁加速等离子体的最大移动速度达到了6 m/s；（2）通过对不同剖面的诱导流场进行研究发现，磁场加速等离子体激励器能够在近壁区产生一系列涡结构.此外，该诱导流场具有显著的三维特征与非定常特性.研究结果为开展基于磁加速等离子体气动激励的流动控制奠定了基础. 

Actuation Characteristics of the Magnetically Accelerated Plasma

In order to enhance the perturbation and improve the control effect of the plasma actuator,the plasma actuator,the characteristics of a novel magnetic acceleration plasma actuator were investigated by using high voltage probe,smoke line flow display technology and particle image velocimetry(PIV).The actuator discharge images at different time instants were obtained and the influence of magnetic field intensity on the electric characteristics and induced flow of the plasma actuator were analyzed.The results show that:(1)The directional motion speed of discharge plasma is proportional to the magnetic field strength,and the maximum motion speed of the magnetically accelerated plasma is up to 6 m/s;(2)The induced flow field of the magnetically accelerated plasma actuator has significant three-dimensional characteristics and unsteady characteristics and a series of induced vortices can be observed.The research results lay a foundation for the development of flow control technology based on the aerodynamic actuation of magnetically accelerated plasma.