装药结构对发射药等离子体点火延迟的影响

Influence of Charge Configurations on Plasma Ignition Delay of Propellants

通过等离子体点火中止燃烧试验研究了发射药装药结构对等离子体点火性能的影响及其相互作用规律。利用等离子体点火燃烧中止装置、压力传感器和瞬态数据采集系统等,测量得到了太根药及单基药等的燃烧中止压力-时间曲线和点火延迟时间,分析了装填密度、等离子体喷孔与发射药的距离以及装药方式等对等离子体点火延迟时间的影响。试验结果表明:增大装填密度以及发射药与等离子体喷孔距离,点火延迟时间变长。在等离子体能量流场的相同位置,装药方式的改变对发射药的点火和燃烧影响不大,点火延迟时间也没有太大差异。

Influence of charge configurations on plasma ignition performance of propellants and plasma-propellant interactions are studied by interrupted-burning experiments of propellants ignited by plasma. The pressure-time curves and ignition delay time in interrupted-burning process of different propellants such as triethyeneglycol dinitrate （TEGN） and single-base propellants ignited by plasma are measured and recorded by transient recorder and pressure sensor in interrupted-burning setup. Influence of loading density, distance between propellants and plasma jet and charge way on plasma ignition delay of propellants is discussed based on experimental results. Results show that ignition delay time becomes longer as loading density of propellants and the distance between propellants and plasma jet increase. At the same selected location in plasma-flow field, different charge ways have little influence on the ignition and combustion process of propellants and ignition delay time as well.