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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。
In order to study the effect of different working medium flow on the plasma igniter jets, the experimental measurement system established by the research group was used to experimentally study the gas breakdown and sustaining arc process of the plasma jet igniter at different working medium mass flow rates. The dynamic process of plasma jet. The experimental results show that the working process of the plasma igniter is divided into three stages: the breakdown stage, the transition stage and the steady stage. In the breakdown stage, the breakdown voltage increases first and then decreases again and then increases with the increase of the working medium mass flow rate High and working medium mass flow of 75.7 g / min and 95.4 g / min, the breakdown voltage reached the maximum and minimum, respectively; in the stabilization phase, the jet length and average voltage first increased with the increase of working medium mass flow rate Decreases; arc shunt period and voltage, current period is almost the same; arc shunt period with the working medium mass flow rate decreases.