三电极等离子点火器激励参数的优化选择

The Optimal Selection for Source Parameter of Three electrode Plasma Igniter

为了扩大点火火核体积,提高放电等离子体点火器的点火可靠性,本文采用了三电极结构来产生大体积的稳定放电。试验对比了不同激励电压、电流下的放电特性,获取了最大放电通道体积时的外激励参数。结果表明:激励电流对放电通道体积的促进作用较弱,随着激励电流的增加,放电通道体积基本无变化,放电通道的功率密度持续上升。激励电压对放电通道体积的促进作用较大,随着激励电压的增加,放电通道体积先增大后不变,放电通道的功率密度则会先降低后上升。对比之下,增大激励电压可以获取更大的放电通道体积。

To enlarge the Spark Kernel and improve the ignition reliability of discharge plasma igniter,this paper generated large volume stable discharge by using three electrode structure.Experiment compared the discharge characteristic under different source voltage and current,and got the source parameter under the maximal volume of discharge channel.The result showed that:the promotion from source current to discharge channel is little,and the volume of discharge channel had no change with increasing source current,basically.The power density steadily increased.The promotion from source voltage to discharge channel is large,and the volume of discharge channel firstly increased and then steadily with increasing source voltage.The power density firstly decreased and then increased.It could make the volume of discharge channel larger to increase source voltage,compared with another method.