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为全面研究GATo-3推进剂的热安全性,采用自行设计的实验装置,进行了不同恒温环境下的热自燃实验,通过测量温度的变化和热自燃延滞期,分析了其热自燃过程特性。同时,采用仿真软件Fluent建立GATo-3推进剂的热自燃实验模型,完成验证并研究了热自燃过程中样品的内部温度分布、点火位置变化和临界温度等。结果表明,GATo-3推进剂的热自燃过程可分为热升温阶段、恒温分解阶段和自热加速升温阶段。温度升高,热自燃延滞期缩短,反应程度更剧烈,点火区域从中心位置向外移动。实验药量下,GATo-3推进剂热自燃的临界温度为83℃。
In order to comprehensively study the thermal safety of GATo-3 propellant, a self-designed experimental device was used to carry out experiments of thermal self-ignition under different constant temperature conditions. The characteristics of thermal self-ignition process were analyzed by measuring the change of temperature and thermal lag period. At the same time, a thermal pyrolysis experimental model of GATo-3 propellant was established by using Fluent software Fluent, and the internal temperature distribution, ignition position change and critical temperature of the sample during thermal pyrophorization were verified and studied. The results show that the thermal spontaneous combustion process of GATo-3 propellant can be divided into the heating stage, the thermostatic decomposition stage and the self-heating acceleration warming stage. As the temperature increases, the pyrophoricity lags shortened and the degree of reaction becomes more intense. The ignition zone moves outward from the center. Under experimental dose, the critical temperature of thermal self-ignition of GATo-3 propellant is 83 ℃.