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The Auto-Ignition Behaviors and Thermal Safety of the Composite Modified Double Base Propellants under Rapid Heating
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-06-28 , DOI: 10.1002/prep.202100102 Meng Yang 1 , Caiyue Liao 1 , Zhaoming Mai 1 , Chenglong Tang 1 , Wenhu Han 2 , Cheng Wang 2 , Siyu Xu 3 , Heng Li 3 , Zuohua Huang 1
Propellants, Explosives, Pyrotechnics ( IF 1.7 ) Pub Date : 2021-06-28 , DOI: 10.1002/prep.202100102 Meng Yang 1 , Caiyue Liao 1 , Zhaoming Mai 1 , Chenglong Tang 1 , Wenhu Han 2 , Cheng Wang 2 , Siyu Xu 3 , Heng Li 3 , Zuohua Huang 1
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The safety issue of energetic materials (EMs) such as propellants or explosives has been a high concern. When EMs are subjected to rapid thermal stimulus, they will ignite or explode, which may cause personal injury and property loss. Studies on auto-ignition behaviors and thermal safety of EMs under rapid thermal stimulation provide important guidelines for EMs in their production, transportation, storage, and application. In this work, auto-ignition experiments of the composite modified double base (CMDB) propellants, which include 1,1-diamino-2,2-dinitroethylene (FOX-7) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) mixtures under high initial temperature condition, have been conducted by using a rapid compression machine (RCM). The temperature rise rate can reach up to 2×104 K/s. Pressure evolution recording and high speed-visualization were synchronized to reveal the auto-ignition behaviors of CMDB samples. Results show that the end of compression (EOC) temperature and pressure have a significant impact on the ignition delay time (IDT). The IDT increases with a decrease in temperature and pressure. In addition, through tuning the EOC temperature and pressure, the critical condition that separates the ignition region and non-ignition region is obtained. The critical ignition temperature of CMDB decreases with an increase in pressure. When the pressure is higher than 2.0 MPa, the critical temperature is about 650 K.
中文翻译：
复合改性双基推进剂快速加热自燃行为及热安全性
推进剂或炸药等含能材料 (EM) 的安全问题一直备受关注。EMs 受到快速热刺激时，会发生燃烧或爆炸，可能造成人身伤害和财产损失。快速热刺激下 EM 的自燃行为和热安全性研究为 EM 的生产、运输、储存和应用提供了重要指导。在这项工作中，复合改性双基 (CMDB) 推进剂的自燃实验，包括 1,1-二氨基-2,2-二硝基乙烯 (FOX-7) 和六氢-1,3,5-三硝基-1， 3,5-三嗪 (RDX) 混合物在高初始温度条件下已通过使用快速压缩机 (RCM) 进行。升温速度可达2×10 4 K/s。压力演变记录和高速可视化同步以揭示 CMDB 样品的自燃行为。结果表明，压缩结束（EOC）温度和压力对点火延迟时间（IDT）有显着影响。IDT 随着温度和压力的降低而增加。此外，通过调节 EOC 温度和压力，得到了区分点火区和非点火区的临界条件。CMDB 的临界点火温度随着压力的增加而降低。当压力高于 2.0 MPa 时，临界温度约为 650 K。
更新日期：2021-06-28
中文翻译：
复合改性双基推进剂快速加热自燃行为及热安全性
推进剂或炸药等含能材料 (EM) 的安全问题一直备受关注。EMs 受到快速热刺激时，会发生燃烧或爆炸，可能造成人身伤害和财产损失。快速热刺激下 EM 的自燃行为和热安全性研究为 EM 的生产、运输、储存和应用提供了重要指导。在这项工作中，复合改性双基 (CMDB) 推进剂的自燃实验，包括 1,1-二氨基-2,2-二硝基乙烯 (FOX-7) 和六氢-1,3,5-三硝基-1， 3,5-三嗪 (RDX) 混合物在高初始温度条件下已通过使用快速压缩机 (RCM) 进行。升温速度可达2×10 4 K/s。压力演变记录和高速可视化同步以揭示 CMDB 样品的自燃行为。结果表明，压缩结束（EOC）温度和压力对点火延迟时间（IDT）有显着影响。IDT 随着温度和压力的降低而增加。此外，通过调节 EOC 温度和压力，得到了区分点火区和非点火区的临界条件。CMDB 的临界点火温度随着压力的增加而降低。当压力高于 2.0 MPa 时，临界温度约为 650 K。
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