Effect of an Additional Parallel Capacitor on Pulsed Inductive Plasma Accelerator Performance
Effect of an Additional Parallel Capacitor on Pulsed Inductive Plasma Accelerator Performance
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附加并联电容器对脉冲感应等离子体加速器性能的影响
DOI：
10.1109/tps.2012.2185854
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发表时间：
2012
影响因子：
1.5
通讯作者：
J. V. Balla
中科院分区：
文献类型：
--
作者：
K. Polzin;A. Sivak;J. V. Balla
利用由一组耦合电路方程和一维动量方程组成的脉冲电感等离子体推力器模型，研究了在系统中加入第二个并联电容器的影响。这些方程是无量纲化的，允许恢复几个已知的缩放参数，并导致对特定拓扑所研究的唯一参数的识别。通过感应加速线圈的电流上升速率被用作感应推进剂电离效果的替代测量，因为较高的上升速率在线圈表面产生更强、潜在更好的电离电场。等高线图表示推进器性能（排气速度和效率）和线圈中的电流上升率作为缩放参数的函数进行了数值生成。分析表明，当第二电容的值远小于第一电容的值时，双电容系统的性能接近于单电容系统的性能。此外，当第二个电容器的值减小时，电流的上升速率可以增长到单电容情况下的两倍。
A model of pulsed inductive plasma thrusters consisting of a set of coupled circuit equations and a 1-D momentum equation has been used to study the effects of adding a second parallel capacitor into the system. The equations were nondimensionalized, permitting the recovery of several already known scaling parameters and leading to the identification of a parameter that is unique to the particular topology studied. The current rise rate through the inductive acceleration coil was used as a proxy measurement of the effectiveness of inductive propellant ionization since higher rise rates produce stronger, potentially better ionizing electric fields at the coil face. Contour plots representing thruster performance (exhaust velocity and efficiency) and current rise rate in the coil were generated numerically as a function of the scaling parameters. The analysis reveals that, when the value of the second capacitor is much less than that of the first capacitor, the performance of the two-capacitor system approaches that of the single-capacitor system. In addition, as the second capacitor is decreased in value, the current rise rate can grow to be twice as great as the rise rate attained in the single-capacitor case.