| NC体系发射药烤燃点火的响应特性 |
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| 引用本文： | 张邹邹,何昌辉,张衡,赵宝明.NC体系发射药烤燃点火的响应特性[J].爆破器材,2021,50(1):38-43. |
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| 作者姓名： | 张邹邹 何昌辉 张衡 赵宝明 |
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| 作者单位： | 西安近代化学研究所（陕西西安，710065） |
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| 摘 要： | 选用制式的硝化棉(NC)体系发射药进行了烤燃试验，研究了NC体系发射药的配方组成对烤燃作用下的自点火温度和燃烧性能的影响。结果表明，NC体系发射药的配方组分对烤燃响应的自点火温度和燃烧性能影响明显，随着烤燃温度上升，NC体系发射药烤燃响应时经历了热分解—点火燃烧—冲破约束强度造成剧烈响应的过程。单基药中NC的自热反应和硝胺发射药中RDX的气相燃爆反应使得发射药迅速完成热分解到燃烧反应的转变，压力增长速度较快;单基药的自点火温度约为157.5 ℃，增加较低温度开始分解的NG和增塑剂TEGDN提前了发射药的自点火温度；发射药烤燃点火后，压力增长速率与发射药配方组成和弧厚有明显关系，与烤燃响应类型和冲击压力规律相符；增加弧厚对发射药烤燃作用下的热分解无影响，降低了点火后压力的上升速率，有利于降低发射药烤燃响应剧烈程度。
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| 关 键 词： | 发射药 烤燃响应 热分解 燃烧性能 |
Ignition Response Characteristics of NC Propellants under Cook-off Test |
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| ZHANG Zouzou,HE Changhui,ZHANG Heng,ZHAO Baoming.Ignition Response Characteristics of NC Propellants under Cook-off Test[J].Explosive Materials,2021,50(1):38-43. |
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| Authors: | ZHANG Zouzou HE Changhui ZHANG Heng ZHAO Baoming |
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| Affiliation: | Xi＇an Modern Chemistry Research Institute (Shaanxi Xi＇an, 710065) |
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| Abstract: | The cook-off test of NC propellant system was carried out. Influence of the composition of the NC propellant system on the self-ignition temperature and combustion performance under the cook-off test was studied. Results show that the components of the NC system propellant has obvious influence on the self-ignition temperature and combustion performance of cook-off response. With the rise of cook off temperature, the NC propellant system experienced a process of thermal decomposition, ignition and combustion, and breaking through the constraint strength. Self-heating reaction of NC in single-base propellant and gas phase combustion reaction of RDX in nitramine propellant make the propellant complete the transition from thermal decomposition of combustion reaction. Pressure growth speed is faster, and the self-ignition temperature of single-based propellant is 157.5 ℃. Addition of NG and TEGDN plasticizer which start to decompose at lower temperature can advance the self-ignition temperature of the propellant. Pressure growth rate of propellant after ignition is obviously related to the composition and arc thickness, and it is consistent with the type of ignition response and the law of shock wave pressure.Increasing the arc thickness has no effect on the thermal decomposition of propellant, but it reduces the ignition pressure rise rate to reduce the propellant combustion intensity response. |
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| Keywords: | gun propellant cook-off response thermal decomposition combustion performance |
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