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水反应金属燃料发动机三维内流场数值模拟

DOI: doi:10.3969/j.issn.1006-7043.2011.10.005

Keywords: 铝颗粒, 凝结, 放热模型, 燃烧, 蒸发效率

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Abstract:

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.

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