旋转燃烧室两相湍流燃烧过程的三维仿真  

Three Dimensional Simulation for Two Phase Turbulent Combustion in Rotation Combustor

作　　者：钱志博[1] 闫萍[1] 王敏庆[1] 张进军[1] 杨杰[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《系统仿真学报》2008年第17期4567-4570,共4页Journal of System Simulation

基　　金：国家自然科学基金资助项目(10574105)

摘　　要：为了解旋转对两相湍流燃烧过程的影响,采用RNG κ-ε湍流模型,ED湍流燃烧模型和离散液滴模型,对转速n=0r/min、1000r/min和2000r/min三种工况下,单组元推进剂在某型水下航行器旋转燃烧室中的燃烧进行了三维仿真,得到了燃烧室内气相速度、静压、液滴轨迹和推进剂质量分数的分布,并对计算结果进行了比较和分析。结果表明,随着转速的增大,静压力升高,燃烧流场回流区中心的位置前移,回流区长度减小,燃烧室内燃气流场和液滴轨迹呈现螺旋状态,推进剂质量分数向燃烧室头部集中。说明旋转使得液体推进剂燃烧加剧,燃烧效率提高,燃烧室结构可以优化缩小。In order to find out the effect of rotation on the two phase turbulent combustion property, the three-dimensional simulation of combustion process of monopropellant was carried out for a rotation combustor in the underwater vehicle. Its combustion flow was described with RNG κ-ε turbulence model, eddy dissipation turbulent combustion model and discrete droplet model for liquid. The flow in the rotation combustor was simulated at three working speeds, 0r/min, 1000r/ min and 2000r/min. The distribution of gas velocity, static pressure, particle motion trajectory, and monopropellant mass fraction were computed and compared. The results show that the static pressure increases with the increasing of the rotating speed and the center of the reversed flow region goes forward while the dimension of the reversed flow region becomes smaller. The gas flow and particle trajectory generates helical movement. The mass fraction distribution of monopropeHant in rotation combustor is nearer its head than that in stationary combustor. It is proven that the rotation makes the fuel combustion fast and improves combustion efficiency. It is suggested that rotation is helpful to shorten the axial length of combustor.

关 键 词：旋转燃烧室 单组元推进剂 两相湍流燃烧 水下航行器 数值仿真 

分 类 号：TJ630.2[兵器科学与技术—武器系统与运用工程]