中文摘要：

为研究不同布局等离子体激励器的电压-电流特性及对流动控制的影响规律,针对多组纳秒脉冲等离子体放电,设计了3种不同布局形式的等离子体激励器,对其放电特性以及流动分离控制能力进行了实验研究,并对其激励特性进行了唯象学仿真分析。结果表明：不同布局形式的等离子体激励器均产生了两组放电的效果,在相同激励电压下,其电流峰值基本相同,同单组激励相比,电流峰值约为其两倍;对流动控制的结果表明,纳秒脉冲等离子体激励能够有效增升减阻,不同布局形式的等离子体激励器对流动分离控制效果有很大影响,升力系数最大提高25.2%,而最小只有6.8%;仿真结果表明,纳秒脉冲等离子体激励能够产生冲击波,并且诱导出复杂的涡结构,不同布局激励器诱导的冲击波的传播速度和强度基本相同,但其诱导的涡的运动和涡量的大小不同,从而对流场产生了不同的扰动,造成了不同的流动控制效果。

英文摘要：

In order to study the discharge characteristics and flow control effect of nanosecond pulsed plasma actuators of different configurations, we designed three different actuators for inducing multi-group nanosecond pulsed plasma dis- charge and tested them. Specifically, their discharge characteristics were calculated based on phenomenological simulations. It is obtained that each of the actuators induces two groups of discharges, which have similar current peak driven by the same voltage. Compared with the single excitation, two-group excitation has similar power density per length. The excitation of nanosecond pulsed plasma is effective in lift enhancement and lowering resistance, while the fi- guration of actuator significantly influences the flow control effect, for instance, the lift enhancement ratio varies from 25.2% to 6.8%. According to the numerical simulations, the nanosecond pulsed plasma excitation can induce shock-waves and result in complex vortex flows. Shock-waves induced by the three actuators have similar speed and intensity, but bring about vortexes with different movements and vorticity magnitudes, thus, the flow field is interfered in, resulting in different flow control effects.