Numerical Study On Explosion Temperature Fields Of Explosive Charges In Explosion Vessel

The temperature and pressure fields of pure explosives and aluminized explosives were studied in cylindrical explosion vessel (Length/Diameter=1) by numerical simulation, and compared with the experimental results.The numerical results of explosion field of three typical pure explosives in explosion vessel simulated by AUTODYN show that, in terms of the peak value of pressure, the positive effect time and the peak value of temperature, HMX is maximum, RDX is followed, and TNT is minimum. The distribution and variation law of temperature and pressure of single compound explosives were studied in explosion vessel. Compared with the experimental data, results show that the afterburning effect of TNT should not be coincided in explosion vessel, the peak value of pressure is basically same at typical positions in the flat end plate and cylindrical shell, and a three-wave-gathering phenomenon appears at the joint point of closed end and cylinder.The temperature and pressure fields of aluminized explosives were also studied in cylindrical explosion vessel by numerical simulation. The equivalence of TNT for aluminized explosive and RDX were calculated, and the equivalence of TNT of RDX is maximum, PBXN-109is followed, and TNT is minimum. The second shock wave of aluminized explosive appears, and the peak pressure of it decreases with the increase of distance. The peak value of temperature of PBXN-109is higher than TNT in the flat end plate and cylindrical shell, and the temperature of pure explosives and PBXN-109have a certain relationship with the distance and container wall reflection.The simulation results also show that, full and intuitional distribution and variation of temperature and pressure fields of different charges explosion in explosion vessel are presented, and better basis and reference for charge design, explosive performance assessment, and explosive energy output law of the energy optimization were provided.