电流体动力等离子体发生器低电极封装实验研究

Experimental Study of Electrohydrodynamic Plasma Actuators with Sealed Lower Electrodes

电流体动力(EHD)等离子体发生器产生的常压等离子体可以在不存在机械活动部件的条件下把电能转化为空气的动能,在气流控制领域具有巨大的发展前景。但是目前EHD等离子体发生器的能量转化效率仍然很低。笔者通过实验探讨了利用Kapton将低电极进行封装对EHD等离子体发生器产生的影响。实验表明,低电极进行封装后低电极附近及电压周期负半周内的等离子体的产生被有效抑制,等离子体发生器产生的气流速度增加,能量转化效率得到显著提高。

Electrohydrodynamic plasma actuator induces the atmosphere plasma to directly convert electric energy into kinetic energy of air without involving moving mechanical parts. Thus it holds a promising future in air flow control. However, until now the converting efficiency of EHD plasma actuator is quite low. This paper focuses on the impact of sealing the lower electrodes with Kapton on the performance of EHD plasma actuator. Experimental results show that the plasma induced near the lower electrodes and in the negative half cycle of voltage is completely quenched, the air flow induced by the plasma actuator is accelerated, and the energy converting efficiency of EHD plasma actuator increases significantly.