介质阻挡放电等离子体流动控制实验研究

EXPERIMENTAL INVESTIGATION OF FLOW CONTROL USING DIELECTRIC BARRIER DISCHARGE PLASMA ACTUATORS

通过平板实验和压气机叶栅实验研究了介质阻挡放电等离子体所产生的电动力对外流流动和内流流动边界层的加速作用。平板实验中采用LDV测量了介质阻挡放电等离子体在静止流场中诱导出的速度场,并研究了激励电压和频率对诱导速度大小的影响;在不同来流速度情况下,测量了等离子体激励对速度剖面的改变。通过低负荷和高负荷压气机叶栅实验,利用三孔探针研究了等离子体激励对栅后总压、速度以及流动分离的影响。实验中发现,流速低于20m/s时,加电产生等离子体后,可显著改善栅后总压和速度分布;流速接近50m/s时,等离子体仍会明显改变总压和速度的最小值;在低速下等离子体激励抑制流动分离是有效的。

Experiments on flat plate and compressor cascade were carried out to investigated the boundary layer acceleration effect of the electro-dynamic force produced by the dielectric barrier dis- charge plasma.In the flat plate experiment,Laser Doppler Velocimetry was used to measure the velocity field induced by the plasma in quiescent environment.Relations between the velocity mag- nitude and the applied voltage as well as frequency were investigated.Velocity profile modifications by the plasma were measured fo...