Flowfield Structure and Acceleration Process in Quasi-Steady Magneto-Plasma-Dynamic (MPD) Arc Channels

准稳态磁等离子体动力 (MPD) 电弧通道中的流场结构和加速过程

• 批准号: 07651123
• 负责人: TAHARA Hirokazu
• 金额: $ 0.32万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07651123/
• 关键词: MPD Thruster; Electromagnetic Acceleration; Plasma Flow; Plasma Diagnostics; Inner Flow; 数値解析

Plasma diagnostic measurement and flowfield analysis in quasisteady coaxial magnetoplasmadynamic (MPD) channels were made to understand blowing acceleration, i.e., one-dimensional flowfield. For Ar, measured current fractions on the anode intensively increased near the inlet. However, current fractions on the cathode gradually increased downstream, and current slightly concentrated near the inlet at high magnetic Reynolds numbers. The electron temperatures were axially kept about 1.0 eV and slightly increased near the inlet and the outlet. The electron number densities increased near the exit, and the characteristics correspond to the current distributions. The experimental results agreed roughly with analyzed ones. Accordingly, it is expected from the axial profile of Lorentz forces inferred from the measured physical properties and the calculated plasma velocities that there are two acceleration zones near the inlet and the outlet. Furthermore, it is predicted from the numerical analysis that the acceleration caused by ionization process is dominant near the inlet.

对准稳态同轴磁等离子体动力 (MPD) 通道中的等离子体诊断测量和流场分析进行了了解吹气加速度，即一维流场。对于 Ar，测量到的阳极上的电流分数在入口附近急剧增加。然而，阴极上的电流分数在下游逐渐增加，并且电流在高磁雷诺数下稍微集中在入口附近。电子温度轴向保持在约1.0 eV，并在入口和出口附近略有增加。电子数密度在出口附近增加，其特征与电流分布相对应。实验结果与分析结果基本一致。因此，从测量的物理特性和计算的等离子体速度推断出的洛伦兹力的轴向分布预计在入口和出口附近存在两个加速区。此外，通过数值分析预测，在入口附近，电离过程引起的加速度占主导地位。

项目成果

Takashi Yomezawa: "Spectroscopic Measurement and Numerical Analysis of Thermal Non-Equilibrium Flow in a 10-KW-Class Arcjet Thruster" Proc. 20th Int. Symp. Space Technol. and Sci.Vol.1. 102-108 (1996)

Takashi Yomezawa：“10 千瓦级 Arcjet 推进器中热非平衡流的光谱测量和数值分析”Proc。

Kazunori Mitsuo et al.: "Arc Structure in a Quasi-Steady MPD Channel" Proc.20th Int.Symp.Space Technol.and Sci.Vol.1. 158-165 (1996)

Kazunori Mitsuo 等人：“准稳态 MPD 通道中的弧结构”Proc.20th Int.Symp.Space Technol.and Sci.Vol.1。

Hirokazu Tahara: "Plasma Features in Quasisteady MPD Chonnels" 24th Int. Electric Propulsion Cont.,Moscow. 95-116. 1-9 (1995)

Hirokazu Tahara：“准稳态 MPD 通道中的等离子体特征”第 24 届 Int。

Takashi Yonezawa et al.: "Spectroscopic Measurement and Numerical Analysis of Thermal Non-Equilibrium Flow in a 10-kW-Class Arcjet Thruster" Proc.20th Int.Symp.Space Technol.and Sci.Vol.1. 102-108 (1996)

Takashi Yonezawa 等人：“10 kW 级电弧喷射推进器中热非平衡流的光谱测量和数值分析”Proc.20th Int.Symp.Space Technol.and Sci.Vol.1。

Hirokazu Tahara: "Effects of Applied Mognetic Fields on Performance of a Quasisteady Magnetoplasmadynamic Arcjet" J. Propulsion and Power. Vol.11. 337-342 (1995)

Hirokazu Tahara：“应用磁场对准稳态磁等离子动力电弧喷射性能的影响”J.推进和动力。