中文摘要：

为了研究不同工作介质流量对等离子体点火器射流的影响,利用课题组建立的实验测量系统,实验研究了不同工作介质质量流量下等离子体射流点火器的气体击穿和维持电弧过程,并用相机记录了等离子体射流的动态变化过程。实验结果表明：等离子体点火器的工作过程分为3个阶段：击穿阶段、过渡阶段、稳定阶段;击穿阶段中,击穿电压随工作介质质量流量增大而先升高再下降再升高,工作介质质量流量为75.7 g/min和95.4 g/min时,击穿电压分别达到最大值和最小值;稳定阶段中,射流长度和平均电压随工作介质质量流量增大而先增大后减小;电弧分流周期与电压、电流周期几乎一致;电弧间分流周期随工作介质质量流量增大而减小。

英文摘要：

In order to investigate the effects of the different air flows on the plasma ignitor jet, we set up an experimental measurement system to study the breakdown process and arc maintaining process of the plasma ignitor under different air flows, and cameras were used to record the dynamic changing process. The results show that the working development of the plasma jet can be divided into three phases： breakdown phase, transition phase, and stabilization phase. During the breakdown phase, as the air flow increases, the breakdown voltage firstly increases and then reduces, later rises again, and reaches its maximum and minimum at air flow of 75.7 g/min and 95.4 g/min, respectively. During the stabilization phase, the length of the plasma jets and average arc voltages increase firstly, and then reduce with the increment of the air flow. The diffluence periods of the arc are almost equal to those of the voltage and the current of the arc. The diffluence periods of the arc shorten as the air flow increases.