CL-20 基含铝炸药超压爆轰实验及其状态方程标定

The overdriven detonation states of high-energy explosives under the conditions of charge structure,different detonation methods and other strong load excitation can improve the explosive energy release ability. The state of ODD products is accurately characterized to address the core problem of the new hexanitrohexaazaisowurtzitane (CL-20)-based aluminized explosives under the action of overdriven detonation (ODD). To this end,the particle velocity of CL-20-based aluminized explosives under ODD conditions is tested based on the impedance matching method,the interfacial pressures of the shock wave in different media are calculated,and the characteristic parameters of detonation reaction zone of CL-20based aluminized explosives are determined. The parameters of JWL+γ equation of state for the detonation products are calibrated by combining with the real-arithmetic genetic algorithm (RA-GA),and the effects of the equations of state of the different detonation products on the overdriven Hugoniot pressure are revealed. The results show that, when the content of aluminium powder is 0% - 30%, the duration of overdriven detonation reaction zone and the width of detonation reaction zone of CL-20-based aluminium-containing explosives are directly proportional to the content of aluminium powder,and the width of the reaction zone is increased by 1. 97 - 2. 7 times compared with that of the reaction zone without added aluminium powder, while the efficiency of energy release of detonation reaction zone is inversely proportional to the content of aluminium powder. When the content of aluminum powder is the same,the energy release efficiency of the detonation reaction zone is decreased by 25% after adding AP. Compared with the existing overdriven detonation equation of state, JWL + γ equation of state can better fit the overpressure Hugoniot parameters and the isentropic expansion of C-J state, and the deviation of the calculated pressure results from the experimental results is less than 5. 5%,which can provide theoretical support for thoroughly understanding of the dynamic mechanical behaviour of explosive detonation reaction zone.