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通过一种同轴水工质脉冲等离子体推进器的LCR放电回路的理论分析和实验来探讨其在运行过程中的能量平衡和能量转换效率。理论分析认为储能电容中的储存能量通过放电转化为加速动能及被传输线和电容的等效电阻消耗掉,并且根据等效电阻的分配情况定义了水工质脉冲等离子体推进器的加速动能和电磁力转换效率。实验研究表明:该水工质脉冲等离子体推进器的存储能量(E0=4.86J)转换成加速动能的能量转换效率是28%,其中11%用于电磁加速及17%用于电热加速,其余72%的存储能量消耗在储能电容和传输线内阻所造成的能量损失上。
The energy balance and energy conversion efficiency of LCR discharge loop in a coaxial hydro-mechanical pulsed plasma thruster are studied by theoretical analysis and experiments. The theoretical analysis shows that the stored energy in the storage capacitor is converted into accelerated kinetic energy by discharge and consumed by the equivalent resistance of the transmission line and the capacitor. According to the distribution of equivalent resistance, the accelerating kinetic energy of the plasma impulse plasma thruster and Electromagnetic force conversion efficiency. Experimental results show that the energy conversion efficiency of stored energy (E0 = 4.86J) of the pulsed plasma thruster for water to accelerate kinetic energy is 28%, of which 11% is for electromagnetic acceleration and 17% for electrothermal acceleration, and the rest 72% of the energy stored in the storage capacitor and transmission line resistance caused by the energy loss.