用详细化学动力学机理模拟固体推进剂组分燃烧的研究进展

针对未来固体推进剂燃烧模型的发展趋势,综述了近年来国外以详细化学动力学机理为基础建立的固体推进剂燃烧模型,并介绍了相关的理论公式和数值求解方法。模型可计算的燃烧特性参数包括燃速、压强指数、燃速温度系数、物种曲线、温度曲线、表面温度和火焰温度等。目前,模型已涉及到的物质包括硝胺类(RDX,HMX,CL-20,HNF)、叠氮类(GAP,BAMO,AMMO)、硝酸酯类(NG,NC,BTTN,TMETN,DEGDN)和硝酸盐类(ADN,AN)等。模型计算结果表明,预测的燃烧特性值与实验值比较一致,证明该机理可预测先进固体推进剂的燃烧特性和指导配方设计。但目前该类模型的主要局限是凝聚相内化学反应路径和反应速率以及凝聚相初生物种的确定问题。

Study on combustion modeling of solid propellant ingredients using detailed chemical kinetics

Aiming at development tendency,the solid propellant combustion models based on detailed chemical kinetic mechanics abroad since 1995 were reviewed,and the related theoretical formula and numerical treatment method were introduced.The calculated combustion characteristic parameters include burning rate,pressure exponent,temperature and burning rate coefficient,ingredient and temperature curves,surface temperature and flame temperature,etc.At present,the materials in the model include RDX,HMX,GAP,GAP/HMX,NG,BTTN,GAP/BTTN,ADN,AP,AP/HTPB,etc.The model calculation results show that the predicted value of combustion characteristics agree well with experimental value.It is proven that the mechanics can be used for predicting combustion characteristics of advance propellant and guiding formulation design.However,the main limit of the model is determination of chemical reation route,reaction rate as well as initial ingredients of the condensed phase.