Efficiency Analysis of a High-Specific Impulse Hall Thruster
Efficiency Analysis of a High-Specific Impulse Hall Thruster
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高比脉冲霍尔推进器的效率分析
DOI：
10.2514/6.2004-3602
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
A. Gallimore
中科院分区：
文献类型：
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作者：
R. Hofer;A. Gallimore
*†高比冲NASA-173 Mv 2霍尔推进器的性能和等离子体测量是使用现象学性能模型分析的，该模型考虑了包含多电荷离子的部分电离等离子体。在300-900 V放电电压范围内，虽然多电荷离子引起的效率净下降仅为1.5- 3.0%，但多电荷离子对离子电流和电子电流的影响不可忽略。在300-900 V电压范围内，放电电流的增加主要是由于多电荷离子比例的增加，而电子电流与其平均值的最大偏差仅为+5/-14%。这些发现揭示了如何通过利用施加的磁场调节电子电流来实现高比冲的有效操作。在300-900 V之间，电压利用率为89- 97%，质量利用率为86- 90%，电流利用率为77- 81%。因此，阳极效率在很大程度上取决于电流利用率。的电子霍尔参数几乎是恒定的电压，从300 V的平均值210下降到400-900 V之间的平均值160。这些结果证实了我们的主张，有效的操作可以实现只有在有限的范围内的霍尔参数。
*† Performance and plasma measurements of the high-specific impulse NASA-173Mv2 Hall thruster were analyzed using a phenomenological performance model that accounts for a partially-ionized plasma containing multiply-charged ions. Between discharge voltages of 300-900 V, the results showed that although the net decrease of efficiency due to multiplycharged ions was only 1.5-3.0%, the effects of multiply-charged ions on the ion and electron currents could not be neglected. Between 300-900 V, the increase of the discharge current was attributed to the increasing fraction of multiply-charged ions, while the maximum deviation of the electron current from its average value was only +5/-14%. These findings revealed how efficient operation at high-specific impulse was enabled through the regulation of the electron current with the applied magnetic field. Between 300-900 V, the voltage utilization ranged from 89-97%, the mass utilization from 86-90%, and the current utilization from 77-81%. Therefore, the anode efficiency was largely determined by the current utilization. The electron Hall parameter was nearly constant with voltage, decreasing from an average of 210 at 300 V to an average of 160 between 400-900 V. These results confirmed our claim that efficient operation can be achieved only over a limited range of Hall parameters.