硝基甲烷爆轰区热作用下铝、铝热剂和含铝炸药颗粒的温度响应

摘要

A formula describing the temperature response of materials heated by thermal effects of explosive detonation was derived.A numerical method of estimating the relation between temperature (T) and penetration depth (x) of materials was presented. With the help of the data of initial temperature, specific heat capacity, density and thermal conductivity of aluminum particle ( system I ),3Fe304-8Al thermit particle (system Ⅱ ) and aluminized explosive (59/20/20/0. 5/0. 5-RDX/AP/Al/binder/additive)particle (system Ⅲ ), and temperature in detonation region and detonation stabilization time of nitromethane,the Tvs x relation diagrams for systems I - Ⅲ were constructed by numerical calculation using derived formula. The results show that under thermal effects in nitromethane detonation region the values of x arrived at ignition temperature of 2070 K for system I,1209.15 K for system Ⅱ and 485.68 K for system Ⅲ is 1.053 μm,1.880 μm and 0. 1905 μm,respectively,and the values of x arrived at original temperature (300 K) is 10.5 μm for system I ,9.6 μm for system Ⅱ and 0.6 μm for system Ⅲ.%推导了描述炸药爆炸作用所致材料温度响应的表达式.提出了估算材料渗透深度(x)与温度(T)关系的数值方法.借助铝颗粒(体系I)、铝热剂(3Fe<,3>O<,4>-8AI)颗粒(体系Ⅱ)和含铝炸药(59/20/20/0.5/0.5-RDX/AP/AI/binder/additive)颗粒(体系Ⅲ)的初温、比热容、密度、热导率和硝基甲烷的爆轰区温度和爆轰持续时间数据,用导出的表达式,通过数值计算,构筑了体系I、Ⅱ和Ⅲ的T-x关系图.结果表明,在硝基甲烷爆轰区热作用下使体系达点火温度2070 K(体系I)、1209.15 K(体系Ⅱ)和485.68 K(体系Ⅲ)的x值分别为1.053,1.880,0.1905 μm,至体系达初温300 K的x值分别为10.5,9.6,0.6μm.