Internal Explosion Energy Release Characteristics of HMX-based Thermo-baric Explosive in Typical Confined Environment
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摘要:为了探究一种高含铝奥克托今（HMX）基温压炸药HA-1在典型约束环境下的内爆炸释能特性，在密闭爆炸罐和半密闭的大型双直角拐弯坑道内进行了内爆炸试验，测量了冲击波超压和准静态超压的变化过程，并以同等质量TNT的爆炸参量为参照，分析了该温压炸药各个反应阶段的释能特性。结果表明：在爆炸罐内，HA-1爆炸后的准静态超压峰值约为TNT的1.4倍，体现出了显著的热效应，但冲击波效应并不明显；在坑道中，爆炸冲击波在壁面约束下不断反射汇聚，尤其是经过坑道的拐角后，由于拐角反射增强了局部区域的反射压力，并提高了铝粉在局部空间内的浓度，使得同一测点处的HA-1最大超压峰值和比冲量分别达到TNT的1.7倍和1.2倍。
Abstract:In order to explore internal explosion energy release characteristics of a high-aluminum HMX-based thermo-baric explosive HA-1 in typical confined environments, internal explosion tests were carried out in a closed explosion vessel and a semi-closed large double right-angle corner tunnel. The shock wave overpressure and quasi-static pressure history curves were measured, and with the explosion parameters of the equivalent mass TNT as a reference, the energy release characteristics in each reaction stage of the thermo-baric explosive were analyzed. The results show that: in the explosion vessel, the peak quasi-static overpressure of HA-1 reaches 1.4 times of TNT after explosion, which shows a significant thermal effect, while the wave effect is unobvious. In the tunnel, the shock wave is continuously reflected and converged under the constraints of the wall, especially after the shock wave passes through the corner of the tunnel, the reflection pressure and the concentration of the aluminum powders in the local space are enhanced due to the corner reflection, so that the maximum overpressure peak and specific impulse of HA-1 at the same measuring point reaches 1.7 times and 1.2 times of that of TNT respectively.
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