电弧射流激励器光谱诊断研究  

Spectral diagnosis of an arc jet actuator

作　　者：袁野 田雷超 郭成 赵青 YUAN Ye;TIAN Lei-chao;GUO Cheng;ZHAO Qing(School of Resources and Environment,University of Electronic Science and Technology of China,Chengdu 610054,China;Shanghai Engineering Research Center of Space Engine,Shanghai Institute of Space Propulsion,Shanghai 201112,China)

机构地区：[1]电子科技大学资源与环境学院,四川成都610054 [2]上海空间推进研究所上海空间发动机工程技术研究中心,上海201112

出　　处：《中国光学（中英文）》2023年第2期296-304,共9页Chinese Optics

基　　金：四川省科技厅重点研发项目(No.2021YFG0369);四川省国际科技创新合作项目(No.2021YFH0057);电子科技大学中央高校基本科研业务费(No.ZYGX2020J014)。

摘　　要：目前,电弧激励器的仿真研究仅局限于得到激励器产生的等离子体的电势、压力、温度和速度等工作特性,而其有关的等离子体状态参数仅限于用光谱诊断其电子温度和电子密度等,二者是分立的,本文试图将其二者统一起来。本文设计了电弧射流等离子体激励器,采用有限元法求解非线性多物理场方程,对此电弧射流等离子体激励器的工作特性进行了数值模拟,得到了激励器内部的电势、压力、温度和速度分布,并在此基础上计算了电子密度,由激励器工况得到了激励器等离子体状态参数(电子温度和电子密度)的仿真计算模型。然后采用发射光谱诊断方法对射流等离子体进行了光谱诊断,利用分立谱线的强度比例法对等离子体电子密度进行计算。结果表明:电弧等离子体激励器诊断实验得到的最高电子温度为10 505.8 K,最大电子密度为5.75×1022m-3。对于不同工况下的等离子体电子温度和等离子体密度,实验和仿真结果数值均随入口气体流量增大及放电电流的增大而增大。表明对于所设计的小型化、高射流速度的电弧射流激励器等离子体状态参数的仿真计算模型是合理且适用的。说明将激励器工作特性仿真与光谱诊断的电子温度、密度统一考虑是基本成功的,同时还有值得进一步改进的地方。At present,the simulation research of arc actuators is limited to only obtaining the working charac-teristics of the plasma generated by the actuator,such as potential,pressure,temperature and velocity,while the plasma state is limited to only diagnosing its electron temperature and electron density by spectrum.The two are separated.This paper attempts to unify the two.Therefore,the arc jet plasma actuator designed here adopts the finite element method to solve the nonlinear multi physical equations.The working characteristics of the arc jet plasma actuator are numerically simulated,and the potential,pressure,temperature and velocity distributions inside the actuator are obtained.On this basis,the electron density is calculated and the simula-tion calculation model of the plasma state(electron temperature and electron density)of the actuator is ob-tained from the working condition of the actuator.Then the spectral diagnosis of the jet plasma is carried out by using the emission spectral diagnosis method,and the electron density of plasma is calculated by using the intensity ratio method of discrete spectral lines.The diagnostic experiment of the arc plasma actuator shows that the maximum electron temperature is 10505.8 K and the maximum electron density is 5.75×1022 m−3.For the plasma electron temperature and plasma density under different working conditions,the experimental and simulation results increase with the increase of inlet gas flow and discharge current.It shows that our simula-tion model of plasma state is reasonable and applicable for our miniaturized arc jet actuator with high jet ve-locity.

关 键 词：发射光谱 光谱学 电子密度 电弧激励器 

分 类 号：O433.4[机械工程—光学工程]