隔板喷嘴排列方式对推力室燃烧流场影响研究  

Influence of baffle injection distribution on combustion fluid field in thrust chamber

作　　者：马列波[1] 丰松江[1] 冯伟[1] 陈峰[1] 聂万胜[1] 

机构地区：[1]中国人民解放军装备学院,北京101416

出　　处：《火箭推进》2016年第3期26-32,共7页Journal of Rocket Propulsion

基　　金：国家自然科学基金项目(51206185;91441123)

摘　　要：针对液氧煤油液体火箭发动机,采用全尺寸六分之一网格,设置周期性边界条件的简化模型,计算得到了喷注器面径向隔板喷嘴交错排列时推力室内三维非稳态两相湍流燃烧流场分布,与全尺寸网格计算结果基本一致,验证了算法与简化模型的有效性,并与喷注器面径向隔板喷嘴直线排列时推力室燃烧流场计算结果进行了对比。结果表明,采用全尺寸六分之一网格,也可较好地数值模拟推力室内燃烧流场;径向隔板喷嘴交错排列,不但有利于延长煤油和氧气的混合时间,使混合更加充分,提高燃烧效率和燃烧室压力,而且可增加喷嘴空间分布的均匀性,使燃烧室中雾化粒子分布更均匀,从而提高温度分布的均匀性。The three-dimensional transient two-phase turbulent combustion flow filed distribution in thrust chamber of LOX/kerosene rocket engine was obtained by using 1/6 of full-scale grid, and setting a simplified model for periodic boundary condition when the radial baffle injection distribution of injector was staggered, which is almost the same as full-scale grid computation result. The validity of the algorithm and the simplified model was verified. A comparison with computation result of combustion fluid field in thrust chamber was done when the radial baffle injection distribution of injectors is linear. The result indicates it can also numerically simulate combustion fluid field in thrust chamber well by using 1/6 of full-scale grid; radial baffle injection staggered distribution is not only good for extending the mixing time of LOX/kerosene to make the mixing effect better enough, and improve the combustion efficiency and the pressure of combustion chamber, but also increases the homogeneity of injection space distribution to make atomization particles distribute more uniformly, so that improve the homogeneity of temperature distribution.

关 键 词：液氧煤油火箭发动机 喷雾燃烧过程 全尺寸数值仿真 隔板喷嘴排列方式 

分 类 号：V434-34[航空宇航科学与技术—航空宇航推进理论与工程]