温压炸药爆炸释热特性研究*

摘要

In order to study the heat release process of RDX based thermal-baric explosive (TBX), heat radiation flux sensor was used to measure the heat radiation flux histories of TNT , 852 and G-1 TBX under free-field and semi-enclosed conditions, respectively, in air blast experiments.The results shows that heat flux-time curves of detonation, an-aerobic combustion and aerobic combustion could be obtained from the heat radiation sensor .In semi-enclosed condition , G-1 presents three distinct heat release processes including detonation , anaerobic combustion and aerobic combustion , while TNT and 852 have only two heat release processes of detonation and anaerobic combustion .Taking the compositions of 852 and G-1 into account , comparative analysis of the heat radiation-time curves revealed that Al is involved in the three re-action stages of G-1.The experimental results under free-field and semi-enclosed conditions show that the reaction process of TBX is strongly affected by the test conditions , in that the semi-enclosed condition facilitates raising the heat release volume of TBX.%为了研究RDX基温压炸药的爆炸热量释放历程，对自由场和半密闭条件下的TNT、852及G-1温压炸药爆炸过程进行了空爆试验，采用热通量传感器记录了3种炸药在两种试验环境下爆炸过程中的热通量时间历程。结果表明，热通量传感器可以获得炸药爆轰、无氧燃烧及有氧燃烧3个阶段的热历程时间曲线；在半密闭空间中爆炸时，G-1温压炸药有3个明显的热量释放历程：爆轰、无氧燃烧和有氧燃烧；TNT和852炸药只有爆轰和有氧燃烧过程。结合852及G-1温压炸药配方组成，对比分析热量释放时间历程曲线认为，铝粉均参与了G-1温压炸药的3个反应阶段。对比自由场和半密闭条件试验结果发现，试验环境对温压炸药反应历程影响较大，半密闭条件有利于提高温压炸药的热量输出。