磁等离子体发动机中离子回旋共振加热多组分流体模拟

Multicomponent Fluid Simulation of Ion Cyclotron Resonance Heating in Magnetoplasma Rocket Engine

关键词:  磁等离子体发动机  螺旋波等离子体源  离子回旋共振加热  能量耦合  流体模拟

Key words:  Magnetoplasma rocket engine  Helicon plasma source  Ion cyclotron resonance heating  Power coupling  Fluid simulation

摘要:

离子回旋共振加热（Ion Cyclotron Resonance Heating，ICRH）单元的加热效果对磁等离子体发动机（Magnetoplasma Rocket Engine，MPRE）的推力性能有至关重要影响。为研究ICRH的加热效果，本文建立了用于模拟MPRE中ICRH单元的二维轴对称多组分流体模型，并采用该模型对MPRE中螺旋波等离子体源的工作模式与不同输入条件的ICRH单元进行了模拟。计算结果表明：螺旋波等离子体源在放电过程中要经历从Trivelpiece-Gould（TG）波模式向螺旋波模式的转变过程，模式转变时电子温度出现峰值，等离子体密度迅速上升；开启ICRH输入后，电子参数基本不变，离子温度有明显提升，表明ICRH单元对离子有显著加热效果；此外，离子温度随ICRH输入增大而升高，ICRH输入电流150A时，离子温度可达50eV以上。

Abstract:

The heating effect of the Ion Cyclotron Resonance Heating stage （ICRH） has a critical impact on the thrust performance of the Magnetoplasma Rocket Engine （MPRE）. In this work， a multicomponent， two-dimensional， axisymmetric fluid model was developed to study the heating effect of ICRH stage and it is used to simulate the operating modes of helicon plasma source together with the ICRH stage of different input. The calculations show that， the helicon plasma source will convert from Trivelpiece-Gould （TG） wave mode to helicon wave mode during the discharge. The conversion is accompanied by an electron temperature peak and the plasma density rises dramatically. After the ICRH input is turned on， the electron parameters are basically unchanged while the ion temperature increases significantly which indicates the ICRH stage has an obvious heating effect on the ions. In addition， the ion temperature increases with the ICRH input. When the ICRH input current is 150A， the ion temperature can reach more than 50eV.