高压脉冲直流等离子体电源的研制及其放电特性  

Development of High Voltage Pulsed DC Plasma Source and Its Discharging Characteristics

作　　者：孙权[1] 李应红[1] 程邦勤[1] 孔维嵩[1] 李真[2] 吴云[1] 

机构地区：[1]空军工程大学工程学院等离子体动力学重点实验室,西安710038 [2]中国人民解放军驻西飞公司军事代表室,西安710089

出　　处：《高电压技术》2012年第7期1742-1748,共7页High Voltage Engineering

基　　金：国家自然科学基金(10972236;50906100;51007095);陕西省自然科学基金(2011JQ7022)~~

摘　　要：为满足高超声速磁流体流动控制实验研究的需要,采用同步高压脉冲电离和直流维持放电技术,研制了一种适用于高超声速激波风洞实验系统的高压脉冲直流等离子体电源。首先进行了静止低气压条件下的放电特性研究。通过高速电荷耦合器件(charge coupled device,CCD)可以发现:初始时刻直流放电强烈,放电电流达到16A;随着电容储存能量的消耗,放电电流逐渐减小,放电强度缓慢减弱,直至完全消失,放电形状近似为一圆形。然后进行了高超声速气流中无磁场激励、磁流体(magnetohydrodynamics,MHD)逆气流减速激励和MHD顺气流加速激励条件下的放电特性研究,提出了用于高超声速激波风洞实验系统的MHD激励强度判定标准。研究结果表明:高超声速气流中施加磁场能够起到稳弧的作用,有磁场激励条件下的电源能量消耗约是无磁场激励条件下的3～4倍;MHD加速激励同MHD减速激励的功率相等,而MHD加速激励的电源能量消耗高于MHD减速激励的电源能量消耗。The high voltage pulsed plus DC plasma source suitable for hypersonic shock wave wind tunnel was developed which could meet the needs of hypersonic MHD flow control experiment. This source adopted synchronous high voltage pulsed discharge and DC-maintained discharge technology. Firstly, we experimentally investigated the plasma discharging characteristics in static low pressure flow, and found that discharging was acuteness at first and current could get 16 A. The current got small and the discharging got week with energy consuming. The discharging area was approximate rotundity. Then, we experimentally investigated the plasma discharging characteristic in hypersonic flow, MHD accelerating actuation and MHD decelerating actuation in hypersonic shock wave wind tunnel, and brought forward a determinant standard of MHD actuation intensity for hypersonic shock wave wind tunnel. The results reveal that the magnetic field can stabilize arc, the energy consuming for plasma source in the presence of magnetic field is three to four times of that in the absence of magnetic field, and the power is approximately equal to that of MHD accelerating actuation and.MHD decelerating actuation but the energy consumption is higher than MHD accelerating actuation.

关 键 词：高超声速 流动控制 等离子体电源 放电特性 激励强度 高压脉冲直流 

分 类 号：O53[理学—等离子体物理] TN86[理学—物理]