快速热作用下带壳铸装梯黑铝炸药热响应实验研究

Experiment Investigation on Thermal Responses of Cast TNT/RDX/AL Compositions with Metal Shell during Fast Heating

为获得快速热作用下铸装梯黑铝炸药的热响应特性,建立了快速加热带壳炸药热响应实验平台。采用快速加热装置产生快速热作用,加热约束钢管内的铸装梯黑铝炸药;采用光纤探针测定炸药化学反应阵面传播速度和轨迹;采用高压传感器测定化学反应阵面压力;以特征线法给出铸装梯黑铝炸药的冲击形成点,获得冲击形成距离。结合管体碎片质量、实测化学反应阵面传播速度和压力、特征线3个方面的分析结果,确定在文中的实验条件下其化学反应状态为爆燃,且半定量的给出冲击形成距离大于2000 mm.另外,通过2种模型计算结果和实验结果的比较可知:在快速热作用下带壳铸装含铝混合炸药热响应的研究中,可采用CJ燃烧模型半定量的预估冲击形成距离和燃烧波后压力。

Experimental platform for the thermal responses of the explosives with metal shell during fast heating is established for investigation on the thermal responses of cast TNT / RDX / AL compositions with metal shell. The fast heating equipment is used to produce a fast heating effect. The cast TNT / RDX / AL compositions in the steel tube are heated up. The transmission velocity and track of the chemical reaction front are measured by using a fiber-optic probe. The pressure of chemical reaction front is measured by high pressure piezoelectricity sensor. The vicinity and distance of shock formation are got by characteristic method. Based on the analysis results of fragments of tubes,transmission velocity and pressure of chemical reaction front,and characteristic diagram,the state of chemical reaction on cast TNT / RDX / AL compositions is determined to be deflagration. Semi-quantitative distance of shock formation is 2000 mm. CJ deflagration model can be used to estimate the distance of shock formation and the pressure of combustion wave for the thermal responses of aluminized explosives with metal shell during fast heating.