拉氏程序使用减敏模型模拟炸药绕爆问题

利用二维拉氏非结构网格爆轰流体程序对高能炸药的爆轰波绕爆问题进行数值模拟.拉氏程序对绕爆问题进行模拟时,会引起网格严重扭曲,导致网格大变形.使用JWL状态方程和三项式反应率,拉氏程序得到的绕爆数值结果与实验定性相同,较好地模拟了爆轰波绕爆过程中的漩涡现象.为了模拟一些钝感炸药在绕爆过程中的死区现象,在炸药反应率中加入减敏因子,模拟结果捕捉到死区,并与国外文章中的数值模拟结果定性相同.

Detonation Diffraction Simulation with Lagrangian Program in a Desensitization Model

High-energy explosive detonation diffraction is simulated with a 2D Lagrangian unstructured mesh detonation fluid program. With EOS of JWL and trinomial reaction rate, numerical result by Lagrangian program agrees with experimental result qualitatively. Phenomena of whirlpool is well simulated. Desensitization is added to reaction rate in simulation of dead zone in insensitive high explosives detonation diffraction. The dead zone is captured. The result agrees with reported data qualitatively.