含TMETN的钝感推进剂燃烧特性数值模拟

Numerical Simulation for Combustion Characteristics of Insensitive Propellant Containing Trimethylolethane Trinitrate (TMETN)

通过分析三羟甲基乙烷三硝酸酯(TMETN)热分解特性,确定了TMETN的化学结构参数,模拟了含TMETN的钝感低特征信号推进剂的燃速和压强指数数据,阐明了TMETN对此类推进剂燃烧性能的影响规律,论述了某种有机钾盐消焰剂(KD)对此类推进剂燃速的作用效果。数值模拟结果显示,理论计算值与实测值吻合的很好;含TMETN的钝感低特征信号推进剂燃速随TMETN含量增加而降低,其压强指数增加;KD可提高此类推进剂的燃速,并可辅助“铅-铜-炭”复合燃烧催化剂增强此类推进剂的平台作用效果。

The chemical structure parameters of trimethylolethane trinitrate （TMETN） were confirmed by analyzing the thermal decomposition characteristics of TMETN. The burning rates and pressure exponents of insensitive and low signature propellants containing TMETN were simulated. The relationship between TMETN content and combustion characteristics of insensitive and low signature propellant containing TMETN was given. And the effect of certain type of organic potassium salt used as flame suppressor （KD） on the burning rate was also discussed. The numerical simulation result shows that calculation results are basically in agreement with test results. The burning rate of insensitive and low signature propellant containing TMETN decreases and pressure exponent of this type of propellant decreases with TMETN content increasing. KD can improve the burning rate of this type of propellant and can help ＂Pb-Cu-CB＂ composite combustion catalyst to enhance plateau effect of this type of propellant.