超声速气流电容耦合射频放电特性

发布时间：2018-03-25 20:38

本文选题：非平衡电离　切入点：电容耦合射频放电　出处：《高电压技术》2017年09期

【摘要】：针对如何产生均匀和稳定的超声速非平衡等离子体这一科学问题,为进一步探究超声速气流电容耦合射频放电特性,建立了超声速非平衡电离磁流体动力技术实验系统,开展了Ma=3.4条件下,超声速气流边界层与主流中心区的电容耦合射频放电特性研究;同时针对超声速放电等离子体的实时诊断问题,基于均匀射频放电模型,联立能量平衡方程,建立等离子体诊断模型对平均电子数密度与电子温度等参数进行诊断。结果表明:超声速气流条件下,通过电容耦合射频可以产生均匀和稳定的放电等离子体;分子数密度是影响超声速气流放电特性的主要因素,同时超声速气流对平均电子温度的影响很小,约为0.46 e V。
[Abstract]:In order to investigate the characteristics of supersonic airflow capacitive coupled RF discharge, a supersonic non-equilibrium ionization magnetohydrodynamic experimental system was established to solve the problem of how to produce homogeneous and stable supersonic non-equilibrium plasmas. The characteristics of capacitance-coupled radiofrequency discharge between the boundary layer of supersonic airflow and the center of the mainstream under Ma=3.4 conditions are studied, and the simultaneous energy balance equation based on the uniform radio frequency discharge model is used to solve the real-time diagnosis problem of supersonic discharge plasma. A plasma diagnostic model was established to diagnose the parameters such as average electron number density and electron temperature. The results show that a uniform and stable discharge plasma can be produced by capacitive coupling radio frequency under supersonic airflow. Molecular number density is the main factor affecting the discharge characteristics of supersonic airflow, and the influence of supersonic flow on the average electron temperature is very small, about 0.46 EV.
【作者单位】：空军工程大学等离子体动力学重点实验室;西北工业大学燃烧热结构与内流场重点实验室;空军哈尔滨飞行学院;
【基金】：国家自然科学基金(11372352;51306207) 中国博士后科学基金(2017T100772;2016M590972) 陕西省博士后科研项目(2016BSHEDZZ38)~~
【分类号】：O461.2

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