封闭式等离子体发生器设计及其放电等离子体参数分布实验研究  

Design on Closed Plasma Generator and Experimental Study on Its Plasma Parameters Distribution

作　　者：苏晨[1] 徐浩军[1] 林敏[1] 梁华[1] 

机构地区：[1]空军工程大学航空航天工程学院等离子体动力学重点实验室,西安710038

出　　处：《高电压技术》2013年第7期1668-1673,共6页High Voltage Engineering

基　　金：国家自然科学基金(51276197)~~

摘　　要：为满足飞行器典型部件隐身需求,针对等离子体隐身技术应用中存在的在低空开放环境下不易产生和维持的问题,设计了一种封闭式的等离子体发生器。使用μs脉冲电源,以氩气为工作气体,在低气压下进行了放电实验。利用发射光谱法,研究了电子温度和电子密度在密闭腔体内部的分布规律。等离子体电子温度变化采用Boltzmann曲线斜率法进行分析,等离子体电子密度的变化通过分析Ar 750.38nm谱线强度变化得到。实验发现:放电电压对于电子密度的影响较为强烈,而对于电子温度影响相对较小。无论从腔体X轴还是Y轴出发,都可以看出其电子温度总体上呈现下降趋势,而电子密度逐渐增加。而且由于进气口和真空泵接口的位置分布产生的气压梯度原因,2个参数的变化在X轴向上都表现得更为强烈。While applying the plasma stealth technology to strong-scattering component of aircraft,there is difficulty in producing and maintaining plasma at a certain density in open environment.To solve this problem,we designed a closed plasma generator.Using microsecond pulse generator and using argon as working gas,we carried out discharge experiments at different voltages in a low pressure environment.The distributions of electron excitation temperature and electron density were studied by means of emission spectrum.The variation trend of electron temperature was analyzed by using the method of the Boltzmann plot,and the variation trend of the electron density was derived from Ar 750.38 nm line intensity.The results show that,the discharge voltage has more effects on the electron density than on electron temperature.Along the directions of either X axis or Y axis,the electron temperature shows a declining trend,whereas the electron density increases;Moreover,because of the pressure gradient,the two parameters change more acutely in the X-axial direction.

关 键 词：闭式等离子体 发射光谱 氩气放电 电子激发温度 电子密度 等离子体隐身 

分 类 号：O531[理学—等离子体物理]