临近空间地面模拟装置等离子体源仿真研究

为了指导临近空间地面模拟装置中等离子体源结构设计及等离子体环境参数优化，围绕相关指标体系要求，采用数值模拟方法，分析临近空间等离子体环境地面模拟装置中的射流等离子体与下游目标模拟体相互作用。通过研究射流入口处等离子体状态与下游等离子体对钝体包覆效果的依赖关系，明确了影响包覆特性的关键等离子体参数、重要外控参量，及其对下游目标模拟体包覆特性的影响规律。仿真结果表明：相对于其他因素，射流入口的半径、气体流速、速度偏角、气体温度、钝体直径、环境背压等工况对有效实验区长度及厚度参数的影响较大。相关结果对于临近空间等离子体环境地面模拟装置中等离子体源优化设计及等离子体环境参数定向调控具有指导和借鉴意义。

Study on Plasma Jet Sources for Laboratory Simulation of Near space Environment

In order to guide the design of plasma source structure and the optimization of plasma environmental parameters in the laboratory simulation of near space environment, the interaction between plasma jet and the downstream target simulator in the ground simulation device is analyzed by numerical simulation method based on the requirements of relevant indicator system. By studying the dependence of the plasma state at the jet inlet and the downstream plasma on the coating effect of the blunt body, the key plasma parameters and important external control parameters that affect the coating characteristics of the blunt body and their influence on the coating characteristics of the downstream target simulator are clarified. The simulation results show that the radius of the jet inlet, the gas flow rate, the velocity declination, the gas temperature, the bluff body diameter, and the environmental back pressure have a greater influence on the length and thickness parameters of the experimental effective zone, especially compared with the other three factors. The results have guidance and reference significance for the optimization design of plasma source and the orientation control of plasma environment parameters of the laboratory simulation of near space environment.