初始环境压力对RDX基温压炸药冲击波超压和温度的影响

Influence of Initial Ambient Pressure on Shockwave Overpressure and Temperature of RDX-Based Thermobaric Explosive

为分析初始环境压力对温压炸药的冲击波超压峰值和温度的影响,在2.6 m^(3)的爆炸罐内开展不同初始环境下不同质量温压炸药的内爆试验,研究初始环境压力对温压炸药冲击波超压峰值与温度的影响.试验结果显示,初始环境压力对冲击波的影响明显,在海拔5 km处产生的冲击波超压峰值衰减率最大.借助Sachs比定律量纲一参数和Hopkins-Brown公式,构建了一个将平原数据推广至不同海拔高度的冲击波入射超压关联模型.进一步分析表明,在相同初始压力下,爆炸温度峰值与炸药量成正比,且随初始压力降低而下降,大药量炸药温度峰值下降程度大于小药量.这些发现对评估温压炸药在高海拔或低气压地区爆炸威力和温度效应评估有着一定的参考价值.

In order to analyze the effect of the initial environmental pressure on the shock wave overpressure peak and the temperature of the thermobaric explosives,some implosion tests were carried out in the 2.6 m^(3)explosion tank under different qualities of the thermobaric explosives,studying experimentally the impact of the initial ambient pressure on the shock wave overpressure peak and the temperature of thermobaric explosives.Test results show that the largest peak overpressure attenuation rate of the shock wave can be generated at 5 km altitude,representing an obvious effect of the initial ambient pressure on the shock wave.Using the dimensionless parameters of Sachs'ratio law and the Hopkins-Brown formula,an overpressure correlation model was constructed for incidence shock wave to generalize the flat data to different altitudes.Further analysis results show that the peak explosion temperature is proportional to the explosive charge in same initial pressure,and it decreases with decreasing initial pressure.And the peak temperature decrease extent of the large charge shows more than that of the small charge.The results can provide a reference value for assessing the explosive power and temperature effect of thermobaric explosives in high or low pressure areas.