In this study, a 1.35 kW HEP-100X Hall thruster is used to explore effective methods for improving the global efficiency of a Hall thruster across a wide range of flow rates, from the perspective of optimizing the channel configuration. Experimental and simulation results indicate that an appropriate increase in the length of the straight segment in the variable cross section channel can increase the neutral gas density as well as move the high-gas-density zone toward the channel outlet, thus increasing the ionization rate and moving the main ionization zone outward. At a low flow rate, the propellant utilization efficiency and anode efficiency can be improved by 2.4 and 6.1%, respectively. In addition, compared with a traditional Hall thruster of the same power with a uniform cross section channel, the HEP-100X Hall thruster equipped with the optimal channel exhibits significantly improved performance, and the lower limit of the anode efficiency is increased from 43.3 to 46.6% across a wide range of flow rates. This study resolves the issue of low efficiency of a Hall thruster at a low flow rate and also provides an effective solution for efficient discharge of the Hall thruster across a wide range of flow rates.

在本研究中，从优化通道配置的角度出发，使用1.35 kW HEP-100X霍尔推力器来探索有效的方法，以提高霍尔推力器在各种流量范围内的整体效率。实验和仿真结果表明，适当增加可变截面通道中直段的长度可以增加中性气体密度，并使高气体密度区域移向通道出口，从而提高电离率和电离率。向外移动主电离区。在低流速下，推进剂利用效率和阳极效率可以分别提高2.4％和6.1％。此外，与具有相同功率且具有统一横截面通道的传统霍尔推力器相比，配备最佳通道的HEP-100X霍尔推进器的性能得到了显着改善，并且在各种流量范围内，阳极效率的下限从43.3％提高到46.6％。这项研究解决了霍尔推力器在低流速下效率低的问题，并且为在各种流速范围内有效排出霍尔推力器提供了有效的解决方案。