水反应金属燃料发动机三维内流场数值模拟  

Numerical simulation of the 3-Dimesional internal flow field of a hydro-reactive metal fuel motor

作　　者：刘丛林[1] 郜冶[1] 贺征[1] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2011年第10期1290-1294,共5页Journal of Harbin Engineering University

基　　金：中央高校基本科研业务费专项基金资助项目(HEUCF100201)

摘　　要：针对目前备受关注的水反应金属燃料发动机,建立镁/水反应模型和有氧化铝凝结的铝颗粒燃烧模型,在此基础上,进一步提出合理的金属水反应放热模型,对发动机内流场进行三维数值模拟,研究了燃烧室中不同种类颗粒的变化规律.结果表明,在常规发动机形式下,铝/水系统发动机燃后凝相较多,铝颗粒充满全部燃烧室,而镁/水系统发动机中,镁颗粒则在短路径中迅速燃烧,且燃烧更加完全,但两系统中水滴的蒸发效率相差不大,统计结果与相关实验现象一致.Hydro-reactive metal fuel motors have recently attracted significant attention. A magnesium/water reaction model and aluminum/water reaction model which considered alumina smoke accumulation were developed. A full heat release model for metal/water burning mechanisms was also used to simulate the 3-dimesional internal flow field of the motor. The movement laws of different types of droplets in the combustion chamber were researched. Results obtained from the computations show that with the regular motor format, compared to the magnesium/water system, there were more solid droplets in the motor of the aluminum/water system after burning, and that the entire flow field was full of aluminum droplets, while the magnesium droplets burned more rapidly and completely. However, there is no remarkable difference in the evaporation efficiency of water droplets between these two systems. The comoutation results coincide with the relative expenment phenomenon

关 键 词：铝颗粒 凝结 放热模型 燃烧 蒸发效率 

分 类 号：V430[航空宇航科学与技术—航空宇航推进理论与工程]