电探针保护气体的优选原则  

A study on the optimization for the protective atmosphere of pins in hydrodynamic measurements

作　　者：唐敬友[1] 岳鹏涛[2] 徐胜利[2] 谷岩[1] 董庆东[1] 

机构地区：[1]中国工程物理研究院流体物理研究所爆轰波与冲击波物理重点实验室,四川绵阳621900 [2]中国科学技术大学力学与机械工程系,安徽合肥230027

出　　处：《流体力学实验与测量》2003年第1期28-31,共4页Experiments and Measurements in Fluid Mechanics

基　　金：国防科技预研基金资助项目(编号:421020102 05)

摘　　要：为了研究强冲击波作用下不同气体对电探针保护能力的差异,通过化爆加载实验分别观察了氦气、氩气和甲烷气体在不同冲击波强度下电探针电路的导通现象,实验发现冲击波马赫数在7.5～12.1范围内,氦气和甲烷气体均能有效地保护电探针,而氩气环境下的电探针电路产生提前导通现象。并用一维流体动力学理论分别计算了在相同的初始条件和3～8km/s范围内的六种不同飞片速度下氦气、氩气和甲烷的冲击状态参数。通过对这些状态参数和相关物性的分析,提出了电探针保护气体的优选原则。To study differences between gases to prevent pin circuits from preconduction, the performance and equation of state of helium, argon and methane under shock compression were investigated. In hydrodynamic measurements, it was found that helium and methane could more effectively protect pins than argon when the Mach numbers of shock waves ranged from 7.5 to 12.1. On the basis of onedimensional fluid dynamics theory, under the same initial conditions, the state parameters of helium, argon and methane impacted by flyers at the six different velocities ranging from 3 to 8km/s were calculated, respectively. By comparison of the shock data of the three gases, optimization was suggested for the protective atmosphere of pins.

关 键 词：电探针 保护气体 状态参数 优选原则 滚体动力学 

分 类 号：O351.2[理学—流体力学]