【摘 要】
：
在阶梯装药结构的大型固体火箭发动机中,采用多点点火技术对火箭发动机装药的正常燃烧推力性能的稳定至关重要.本文建立了点火药盒内点火药燃烧过程的经典内弹道模型,采用Fluent软件,对不同点火药盒数量和不同的放置位置(即以点火药量330 g采用头部及中部同时点火,以点火药量400 g采用头部及中部同时点火,以点火药量330 g采用尾部及中部同时点火,以点火药量为400 g尾部及中部同时点火等4种工况)的点火药燃气流入推进剂药床中的流动过程及内流场的流动特性进行了数值仿真计算.研究结果表明,针对头部与中部以33
【机 构】
：
南京理工大学能源与动力工程学院,南京 210094
论文部分内容阅读
在阶梯装药结构的大型固体火箭发动机中,采用多点点火技术对火箭发动机装药的正常燃烧推力性能的稳定至关重要.本文建立了点火药盒内点火药燃烧过程的经典内弹道模型,采用Fluent软件,对不同点火药盒数量和不同的放置位置(即以点火药量330 g采用头部及中部同时点火,以点火药量400 g采用头部及中部同时点火,以点火药量330 g采用尾部及中部同时点火,以点火药量为400 g尾部及中部同时点火等4种工况)的点火药燃气流入推进剂药床中的流动过程及内流场的流动特性进行了数值仿真计算.研究结果表明,针对头部与中部以330 g及400 g药量点火,其点火燃气的内流场特性,数值计算结果与试验计算结果基本一致;在4种工况中,头部与中部同时点火的结构点火效果优于尾部与中部同时点火的结构,可以较快地形成均匀一致的点火压力分布,有利于提高推进剂点火的同步性与均匀性.
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