【摘要】 为了研究冲击压缩下用作电探针保护介质的甲烷气体状态参数 ,用二级轻气炮加载方法加速平面钨合金飞片到 4.77km/s、4.89km/s和 5 .0 5km/s,撞击封装有甲烷气体的铝靶。采用六通道瞬态光学高温计系统记录下甲烷气体的高温辐亮度历史 ,拟合出甲烷的表观辐亮度温度。给出了对应飞片速度下初始压力为 0 .1 2MPa的甲烷气体的冲击压缩参数。实验分析表明 ,强冲击波压缩下的甲烷波后温升较小 ,冲击波后的气体存在非平衡热辐射过程和非平衡化学反应区。分析认为 ,甲烷气体是优越的电探针保护气体更多还原

【Abstract】 To study state parameters of methane as atmosphere gas of pins under shock compression, Aluminum target chambers filled with methane gases to a pressure of 0.12MPa were impacted by tungsten alloy projectiles which were accelerated to 4.77km/s, 4.89 km/s , 5.05 km/s using a two stage light gas gun. The radiance signals from shocked methane gases were recorded by an instantaneous six channel pyrometer system. The velocities of shock waves were measured and the seeming radiance temperatures were obtained to be 3850± 89K , 4080± 105K and 4269± 96K , respectively. The velocities of particles at the boundaries of targets/gases were calculated. The experimental results indicated that the temperatures of strongly shocked methane gases were relatively low and there existed non equilibrium thermal radiation and chemical reactions in shock downstream. The lower shock temperature of gaseous methane showed that gaseous methane may be a kind of advantageous atmosphere gas to protect pins.更多还原