磁屏蔽霍尔推进器的高电流密度性能

IF 1.7 4区 工程技术 Q2 ENGINEERING, AEROSPACE
Leanne L. Su, Parker J. Roberts, Tate M. Gill, William J. Hurley, Thomas A. Marks, Christopher L. Sercel, Madison G. Allen, Collin B. Whittaker, Eric Viges, Benjamin A. Jorns
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引用次数: 0

摘要

对使用氙和氪的磁屏蔽霍尔推进器在放电电流密度比额定值大 10 倍的情况下的性能进行了鉴定。在 300 V 放电电压和 15 至 125 A(氙)及 15 至 150 A(氪)放电电流条件下,使用推力台架和远场探针套件对运行情况进行了评估。在最高电流下,氙的推力、比冲和阳极效率分别为 1650±30 mN、2309±56 s 和 52.8±2.0%;氪的推力、比冲和阳极效率分别为 1839±18 mN、2567±48 s 和 55.0±1.6%。最高条件下的推力密度分别是最低电流条件下的 6 倍(氙)和 8 倍(氪)。根据放电电流的函数,两种气体的阳极效率都达到了最大值。这归因于质量利用率和束流利用率之间的权衡,质量利用率随电流的增加而增加,直至达到统一;束流利用率则随电流的增加而逐渐降低。这些效率模式对电流的依赖性在一系列第一原理缩放定律的背景下进行了讨论。在大功率电力推进发展的背景下,对效率仅随电流密度适度降低这一观察结果进行了研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-Current Density Performance of a Magnetically Shielded Hall Thruster

The performance of a magnetically shielded Hall thruster operating on xenon and krypton is characterized at discharge current densities up to 10 times greater than its nominal level. A thrust stand and far-field probe suite are employed to evaluate operation at 300 V discharge voltage and discharge currents from 15 to 125 A (xenon) and from 15 to 150 A (krypton). The thrust, specific impulse, and anode efficiency at the highest currents are found to be 1650±30 mN, 2309±56 s, and 52.8±2.0% respectively for xenon, and 1839±18 mN, 2567±48 s, and 55.0±1.6% for krypton. The thrust density at the highest conditions are shown to be six (xenon) and eight (krypton) times higher than the lowest current condition. A maximum in anode efficiency as a function of discharge current is observed for both gases. This is attributed to a trade between mass utilization, which increases to unity with current, and beam utilization, which gradually decreases with current. The dependence of these efficiency modes on current is discussed in the context of a series of first-principles scaling laws. The observation that efficiency only moderately decreases with current density is examined in the context of high-power electric propulsion development.

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来源期刊
Journal of Propulsion and Power
Journal of Propulsion and Power 工程技术-工程:宇航
CiteScore
4.20
自引率
21.10%
发文量
97
审稿时长
6.5 months
期刊介绍: This Journal is devoted to the advancement of the science and technology of aerospace propulsion and power through the dissemination of original archival papers contributing to advancements in airbreathing, electric, and advanced propulsion; solid and liquid rockets; fuels and propellants; power generation and conversion for aerospace vehicles; and the application of aerospace science and technology to terrestrial energy devices and systems. It is intended to provide readers of the Journal, with primary interests in propulsion and power, access to papers spanning the range from research through development to applications. Papers in these disciplines and the sciences of combustion, fluid mechanics, and solid mechanics as directly related to propulsion and power are solicited.
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