摘要
用二级轻气炮加载方法把平面钨飞片加速到 1.78km/s、2 .0 0km/s和 2 .76km/s,对封装有氩气的铝材料靶盒进行碰撞 ,由此产生的平面冲击波加热氩气样品。通过光纤传输、六通道瞬态光学高温计和示波器系统记录冲击氩气的高温辐射历史 ,从而测量出气体中的冲击波速度 ,并观察出随冲击强度的逐渐增大时氩气发光特性的变化规律 :冲击压缩下波后氩气的光辐射强度随时间变化 ,信号曲线从直线变为指数曲线。在一维冲击波和局域热动平衡假设下 ,通过简单的理论计算和分析解释了实验现象和相关的辐射机制。
Aluminum targets filled with argon gas were impacted by tungsten projectiles with velocities of 1 78km/s, 2.00km/s, and 2.76km/s.The radiation of the gas following the shock fronts was recorded using a six channel pyrometer and oscilloscopes.The velocities of shock waves in the gas were measured and the radiant properties of the gas under different shock conditions were surveyed. It was observed that the radiant intensities of the gas in the shock downstream varied with time first linearly and then exponentially when shock velocity gradually increased. Assuming that shock waves in gases were one dimensional and local thermodynamic equilibrium was reached under shock compression, the experimental results and the corresponding radiant mechanism were explained by means of simple theoretical calculation and analysis.
出处
《高压物理学报》
CAS
CSCD
北大核心
2001年第4期285-290,共6页
Chinese Journal of High Pressure Physics
基金
中国工程物理研究院国防科技预研基金 (2 0 0 0 10 1 0 5 8 4 )
