硝胺（RDX,HMX）发射药燃烧性能的模拟

在火药燃速预估模型的基础上，分析了硝胺炸药热分解机理，提出了硝胺燃烧初期热分解反应的假设，对燃烧表面气相组成进行了分类，推导了硝胺发射药燃速公式和压力指数公式。将硝胺发射药燃速表达为燃烧室压力和发射药组成的函数。对硝胺含量、种类不同的发射药的燃烧性能进行了数值模拟。计算值与实测数据十分吻合，最后讨论了硝胺发现药燃还压力指数全程特征和压力指数的可能性。认为燃烧表面附近Ｎ２Ｏ气体氧化性活化和硝胺化学结

Modeling for Nitramine (RDX,HMX) Propellant Burning Characteristics

Based on the prediction model for propellant burning rate, the thermal decomposition mechanism of nitramine is analysed, and the nitramine decomposition hypothesis in the primary stage of combustion is proposed, the classification of the gases near the burning surface is carried out and the burning rate expression and the pressure index expression of nitramine propellants are derived. The modeling of burning characteristics of nitramine propellant with different kinds and contents of nitramine in the pressure region from 0 to 400 MPa is made. The results show that the calculated values are in good agreement with the experimental data. Finally, the pressure index value of nitramine propellants and the possibility of pressure index modification are discussed.