复合固体推进剂燃速温度敏感系数的模拟计算

SIMULATING COMPUTATION OF BURNING RATE TEMPERATURE SENSITIVITY OF COMPOSITE SOLID PROPELLANTS

本文根据“价电子反应”稳态燃烧模型和模拟计算方法,模拟计算了AP粒径、粒径分布宽度,AL含量、AL粒径以及压力对“AP/AL/HTPB/催化剂”系列推进剂的燃速温度敏感系数σp的影响规律,结果同文献[4]所综合或分析预测的结果一致.可以认为:初温对凝聚相反应的影响是主要的;AP粒径越大,σp越高;AP粒径分布宽度对σp有显著影响;铝含量增加,σp略有降低,压力升高,σp降低.

Temperature sensitivity is one of the aspects in propellant combustion and ballistic properties.Based on our comprehensive combustion model of solid-propellant[2-5], AP particle diameters, particle diameter distributions, Al contents, Al particle diameters as well as the combustion pressures affecting solid-propellant burning rate temperature sensitivity σp are calculated.From these results,the following conclusions have been obtained:1.the propellant bulk temperature affects mainly on the condensed phase reactions, but less on the gas phase reactions;2.the temperature sensitivity σp varies notablly with the AP particle size; and 3. increasing the Al content may lightly decrease σp,but the hi-gher the pressure is, the smaller the σp.