电弧加热发动机羽流电子温度的探针诊断

Arcjet Plume Plasma Measurements Using Electrostatic Probe

电弧加热发动机(Arcjet)由于其比冲远高于传统的使用化学推进剂的发动机,近年来引起了愈来愈多的关注。文章建立了一套在真空环境下利用静电探针诊断技术测量Arcjet羽流电子温度的实验装置, 并且对以氩气为工质的 Arcjet 的羽流进行了测量, 得到了羽流电子温度的轴向和径向分布情况, 以及电子温度随电弧电流和工质流量变化的趋势。实验结果表明Arcjet羽流轴线处的电子温度远大于重粒子温度。

Arcjet attracts more and more researchers today, because its specific impulse is higher than the thrusters with chemical propellants. A electrostatic probe diagnostics system used in vacuum environment, for the measurement of the electronic temperature of the Arcjet plume plasma is established. The electronic temperature of the Arcjet plume, with argon as the propellant, is measured by this system, and the axial and radial distribution electronic temperature of plume is obtained. The result shows that the electronic temperature is much higher than the heavy particle temperature in the axis of the Arcjet plume.