电压波形对介质阻挡等离子体放电特性和体积力的影响

发布时间：2019-01-06 14:48

【摘要】：驱动电压波形对于介质阻挡放电等离子体激励器的放电状态和激励性能均有影响。基于典型构型的介质阻挡放电等离子体激励器(DBDPA)在静止大气中的放电实验,通过电学测量和电子天平测力,分别获得了不同驱动电压波形下DBDPA的放电电流电压信号和射流产生的时均反推力等物理量。驱动电压波形主要包括正弦波、方波、对称三角波和正、负斜波。基于伏安特性图分析了放电电流、微放电电流脉冲等特性,基于Lissajous图分析获得了放电功率,初步讨论了沉积电荷对DBDPA起始放电的影响。结果表明:驱动电压波形所决定的电压变化率直接影响激励器的回路电流和等离子体微放电电流脉冲形态。放电中的表面沉积电荷形成虚拟电极,其在裸露电极极性发生反转时加强了电极间的电场,降低了起始放电电压阈值,使得放电得以提前。所有驱动电压波形中,方波驱动电压产生的时均反推力和放电功率均相对较大,正弦波次之,其余波形相对最小。其中,50%占空比方波产生的2个量最大。
[Abstract]:The driving voltage waveform affects both the discharge state and the excitation performance of the dielectric barrier discharge plasma exciter. The discharge experiments of a typical dielectric barrier discharge plasma exciter (DBDPA) in stationary atmosphere were carried out by electrical measurements and electronic balance measurements. The discharge current and voltage signals of DBDPA under different driving voltage waveforms and the time-averaged thrust produced by jet are obtained respectively. Driving voltage waveform mainly includes sine wave, square wave, symmetric triangle wave and positive and negative oblique wave. The characteristics of discharge current and micro-discharge current pulse are analyzed based on the volt-ampere characteristic diagram, and the discharge power is obtained based on Lissajous diagram. The effect of deposition charge on the initial discharge of DBDPA is discussed preliminarily. The results show that the voltage change rate determined by the driving voltage waveform directly affects the circuit current of the exciter and the pulse shape of the plasma micro-discharge current. The surface deposited charge in the discharge forms a virtual electrode, which strengthens the electric field between the electrodes when the polarity of the bare electrode reverses, reduces the threshold of the initial discharge voltage, and makes the discharge advance. Among all the driving voltage waveforms, square wave drive voltage produces relatively large reverse thrust and discharge power, followed by sinusoidal wave, and the other waveforms are relatively minimum. Among them, 50% duty cycle of the two largest waves generated.
【作者单位】：西北工业大学翼型叶栅空气动力学国防科技重点实验室;
【基金】：国家自然科学基金(11472221)~~
【分类号】：O461.2;O53

【共引文献】