固体推进剂药柱裂缝燃烧研究

静态点火条件下 ,在复合推进剂和双基推进剂裂缝燃烧实验的基础上 ,建立了一个综合静态点火模型。其中包括对流换热效应、气相热传导效应、热辐射效应、侵蚀燃烧效应和声振腔的影响。数值求解后得到许多参数的变化规律 ,可以预估裂缝燃烧的基本特征及其影响因素。文中就火焰传播速度与实验结果比较 ,吻合较好。此模型既可用于双基推进剂的裂缝燃烧研究 ,又可用于复合推进剂 ,具有较广泛的适用性。

RESEARCH ON CRACK COMBUSTIONS OF PROPELLANT GRAINS

On the basis of experimental study of crack combustion of both composite and double base grains a comprehensive static igniting model has been established,which considers heat convection,heat conduction,heat radiation,erosive burning effect and the influence of acoustic oscillation chamber.Two sets of partial differential governing equations have been derived.As a result of their numerical solution variations of many principal parameters have been obtained such as the flame spreading velocity,the pressure distribution,the temperature distribution and the hot gas velocity distribution.The essential behaviours of propellant crack combustion could be easly predicted.For example,the flame predicted spreading velocity is proved in quite good agreement with the experimental data.This model is possessed of extensive applicability not only for the double base propellant but also for the composite propellant.