RDX炸药爆轰产物物态方程

Equation of State of Detonation Products for RDX Explosive

采用基于统计物理的爆轰产物物态方程模型,研究了不同初始密度下RDX炸药爆轰产物性质,发现炸药初始密度小于1.20g/cm3时,炸药爆轰后只有气相产物生成,随着炸药初始密度进一步增大,爆轰后有固相碳析出。炸药初始密度小于1.60g/cm3时,各气相产物按均匀混合处理,计算的爆速、爆压和实验值符合较好。随着炸药初始密度进一步增大,计算的爆速、爆压与实验值出现较大的偏差,经分析发现此处可能出现了超临界流体相分离现象,在物态方程模型中考虑了这种效应后,得到较好的结果。

The equation of state of detonation products for RDX explosive at different initial densities is calculated by adopting the program based on the statistical physics model.It is found that only gas phase product generates after the explosive detonation when the initial density of explosive is less than1.20g/cm3.With the increasing of initial density of explosive,solid carbon dissolves out after the explosive detonation.When the initial density of explosive is less than 1.60g/cm3,the calculated detonation velocity and detonation pressure is in good consistent with the experimental value regarding the gas phase product as uniform mixing.With the increasing of initial density of explosive,the calculated detonation velocity and detonation pressure deviate largely from the experimental value.After detailed analysis,we find out that there is a supercritical fluid phase separation in this condition.Considering this effect in our program,agood result is obtained.