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为研究箱装发射药堆中发射药的温度、发射药的安全性及其所含有的能量随时间的变化规律 ,采用求解原始变量的通用计算程序 PHOENICS(1.4版本 )并结合“虚拟密度法”,对具有多个离散内热源的非稳态导热与自然对流换热的耦合传热过程进行了数值模拟。结果表明 ,当散热通风条件比较好、环境温度和初始温度较低 (≤ 5 0℃ )时 ,在经历 5 0年后发射药不会发生热自燃 ,发射药所含有的能量足够高 ;而当环境温度和初始温度比较高 (如 :12 0℃ )时 ,发射药很快就会发生热自燃 ;在绝热边界条件下 ,即使在初始温度、环境温度及环境中空气的温度都较低的情况下 ,发射药也可能发生热自燃
In order to study the temperature of projectile, the safety of projectile and the energy content of projectile in time, the universal computing program PHOENICS (version 1.4) for solving the original variables and the “virtual density method” , A numerical simulation of the coupled heat and heat transfer between unsteady heat transfer and natural convection heat transfer with multiple discrete internal heat sources was carried out. The results show that when the ventilation and cooling conditions are good and the ambient temperature and initial temperature are low (≤ 50 ℃), the spontaneous combustion of the propellant does not occur after 50 years, and the energy contained in the propellant is high enough. When the ambient temperature and the initial temperature are relatively high (eg, 120 ° C), the projectile pyrolyzes spontaneously. Under the adiabatic boundary conditions, even at the initial temperature, the ambient temperature and the ambient air temperature are low Under the propellant may also be spontaneous combustion