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INVESTIGATION OF INTERNAL MECHANISM OF ELECTRIC THRUSTERS AND THEIR PERFORMANCE ANALYSIS

电动推进器内部机构研究及性能分析

基本信息

批准号：
04302025
负责人：
ARAKAWA Yoshihiro
金额：
$ 20.67万
依托单位：
UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04302025/
关键词：
ELECTRIC PROPULSION PLASMA PHENOMENA PERFORMANCE ANALYSIS ACCELERATION MECHANISIM COOPERATIVE RESEARCH ION ENGINE ARC-JET MPD THRUSTER 電気推進

项目摘要

In electric propulsion, there are several kinds of electric thrusters, such as electrostatic type, electromagnetic type and electrothermal type. The drawbacks common to the thrusters are ; 1)low energy conversion efficiency, 2)not demonstrated endurability for long operation, and 3)not obtained scaling laws determining thruster performance. To overcome these drawbacks, it is necessary to investigate physical phenomena in thrusters, Such-as ionization and dissociation processes, plasma acceleration mechanism, and heat and energy transport processes, not only by theoretical analysis but also by experimental one.For this purpose, this study has been continued for three years since 1992. It was a co-operative work of researchers and engineers of universities and research institutes, and had joint-meetings for several times, exchanging informations and discussing research contents and current topics.As the resuit, it was concluded that ; 1) in ion thrusters, numerical code has been constructed, which can be used to estimate thruster performance for given geometrical design and operating parameters, 2) as for arcjet thrusters, arc dischrage behaviors were examined and clarified both by experimental observations and by numerical calculations, 3) MPD flow analyzes have been conducted to obtain a further understanding of the relations between plasma flow and arc discharge, indicating that non-equilibrium flow plays an important role on inoization and plasma acceleration processes.

在电力推进中，有静电型、电磁型和电热型等几种类型的电动推力器。推进器的共同缺点是；1)能量转换效率低，2)没有证明长时间运行的耐久性，3)没有得到决定推进器性能的标度定律。为了克服这些缺陷，有必要对推力器中的物理现象，如电离和解离过程、等离子体加速机制、热量和能量输运过程进行理论分析和实验研究。为此，这项研究自1992年以来持续了三年。这是高校和科研院所的研究人员和工程师的合作工作，并多次举行联席会议，交流信息，讨论研究内容和当前课题。结果表明：1)在离子推力器中，建立了数值代码，可用于估计给定几何设计和工作参数下的推力器性能；2)在电弧推力器中，通过实验观察和数值计算对电弧放电行为进行了研究和澄清；3)进行了MPD流动分析，以进一步了解等离子体流动与电弧放电的关系。表明非平衡流在等离子体的注入和加速过程中起着重要的作用。