根据环形磁铁位置确定应用场 MPD 推进器的性能和放电特性

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2024-09-23 DOI:10.1016/j.vacuum.2024.113674

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引用次数: 0

摘要

磁场对磁质动力（MPD）推进器的性能和放电特性有重大影响。我们开发了一种工作功率为 10 kW 的低功率 MPD 推进器，并通过改变外加磁场对其性能特征进行了研究。在 4-10 kW 的输入功率范围内，推力从 92 mN 增加到 310 mN，比冲从 479 秒增加到 1264 秒。羽流的频谱分析表明，性能的提高主要受离子电流密度而非离子能量的影响。此外，通过调整永久磁铁相对于放电通道内氧化铝绝缘体的位置，从 z = 0 厘米到 -4 厘米，每隔 1 厘米调整一次，放电通道内磁场的形状和磁通密度都发生了变化。因此，在 Br/Bz = 0.3 的特定磁场配置下，尽管没有达到最大磁场强度，推力却增加了约 14-40%。径向磁场与轴向磁场的比率与推进器的性能密切相关，在优化设计时应加以考虑。

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Performance and discharge characteristics of Applied–Field MPD thruster in accordance with ring magnet position

The magnetic field has a significant impact on the performance and discharge characteristics of magnetoplasmadynamic (MPD) thrusters. A low-power MPD thruster with an operating power of 10 kW was developed, and its performance characteristics were examined by altering the applied magnetic field. The thrust increased from 92 mN to 310 mN, and specific impulse from 479 s to 1264 s, respectively, within the input power range of 4–10 kW. Spectral analysis of the plume revealed that the increase in performance was significantly affected by the ion current density rather than by the ion energy. Furthermore, the shape and flux density of the magnetic fields inside the discharge channel were altered by adjusting the position of the permanent magnets from z = 0 to −4 cm at 1 cm intervals relative to the alumina insulator inside the discharge channel. Consequently, the thrust increased by approximately 14–40 % at the specific magnetic field configuration with a ratio of B_r/B_z = 0.3, despite not being at the maximum magnetic field strength. The ratio of the radial to axial magnetic fields is strongly correlated with thruster performance and should be considered in optimizing design.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.