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一个改进的电磁波传输激波管实验

熊壮 张勇勇 王苏 李进平 陈宏 范秉诚 崔季平

熊壮, 张勇勇, 王苏, 李进平, 陈宏, 范秉诚, 崔季平. 一个改进的电磁波传输激波管实验[J]. 力学学报, 2018, 50(6): 1328-1366. doi: 10.6052/0459-1879-18-284
引用本文: 熊壮, 张勇勇, 王苏, 李进平, 陈宏, 范秉诚, 崔季平. 一个改进的电磁波传输激波管实验[J]. 力学学报, 2018, 50(6): 1328-1366. doi: 10.6052/0459-1879-18-284
Xiong Zhuang, Zhang Yongyong, Wang Su, Li Jinping, Chen Hong, Fan Bingcheng, Cui Jiping. AN IMPROVED EXPERIMENT FOR ELECTROMAGNETIC WAVE TRANSMISSION IN SHOCK TUBE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(6): 1328-1366. doi: 10.6052/0459-1879-18-284
Citation: Xiong Zhuang, Zhang Yongyong, Wang Su, Li Jinping, Chen Hong, Fan Bingcheng, Cui Jiping. AN IMPROVED EXPERIMENT FOR ELECTROMAGNETIC WAVE TRANSMISSION IN SHOCK TUBE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(6): 1328-1366. doi: 10.6052/0459-1879-18-284

一个改进的电磁波传输激波管实验

doi: 10.6052/0459-1879-18-284
基金项目: 1) 中国科学院力学研究所高温气体动力学国家重点实验室资助项目.
详细信息
    作者简介:

    null

    2) 王苏,研究员,主要研究方向:高温气体特性激波管实验. E-mail: suwang@imech.ac.cn

  • 中图分类号: O354.7,O53;

AN IMPROVED EXPERIMENT FOR ELECTROMAGNETIC WAVE TRANSMISSION IN SHOCK TUBE

  • 摘要: 在中国科学院力学研究所$\varPhi $ 800 mm高温低密度激波管上进行电磁波在等离子体中传输机理研究时,低密度和强激波条件下,由于气体解离和电离等非平衡过程,使得激波后2区宽度显著减小;同时由于边界层效应造成激波衰减和接触面加速,使得激波后2区长度进一步减小.这两个效应导致激波管2区实验观测 时间减小,2区气体处于非平衡状态,增加了观察数据的不稳定性和数据分析的难度.本文提出在$\varPhi 800 $ mm高温低密度激波 管中采用氩气(Ar)和空气(Air)混合气替代纯空气作为激波管实验介质气体.利用Ar不解离和难电离的特性,减小激波前后压缩比,从而 增加激波后2区实验时间和气体长度. 采用Langmuir 静电探针和微波透射诊断技术测量激波后电子密度,同时利用探针测量激波后2区实验时间.结果显示,在Ar+Air混合气实验中,激波波后电子密度可达与纯Air同样的10$^{13}$cm$^{ - 3}$量级.在与纯Air相同的电子密度和碰撞频率条件下,采用95%Ar+5%Air和90%Ar+10%Air两种混合气,激波后2区实验时间和气体长度约为纯Air条件下的5$\sim $10倍,其中2区实验时间为300$\sim $800 $\mu$s,2区气体长度1$\sim $1.5 m.在$\varPhi $800 mm激波管中采用Ar+Air介质气体进行电磁波传输实验,获得了比在纯Air介质中与理论预测更一致的结果.

     

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  • 收稿日期:  2018-08-31
  • 刊出日期:  2018-11-18

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