南京航空航天大学学报（英文版）2004，Vol.21Issue(2)：134-140,7.
壁面冷却的三股混合气流的数值计算
NUMERICAL CALCULATION OF THREE-STREAM MIXING FLOW WITH WALL COOLING
王锁芳 1李立国 1吴国钏1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京,210016,中国
- 折叠
摘要
Abstract
The flow and the temperature in the three-stream mixing flow of the lobed nozzle mixer-ejector with double-wall diffuser are numerically investigated. The domain of computation is divided into sub-domains according to the shapes of the double-plate and lobed nozzle. The three-dimensional body-fitted coordinated grids are generated respectively in these sub-domains by solving Lapalace′s equations. Grids are dense on the boundaries and orthogonal at the lobe. The grids of all sub-domains compose the whole grid of the domain. In order to avoid the divergence of the computation as the serious non-orthogonality of the grid from the lobe, the co-located grid,SIMPLEC and Chen-Kim modified k-ε turbulence model are applied. The great viscosity, the linear and simultaneous cooperation under-relaxation factors are used to solve the coupling of the fluid and solid. Results show that the air is ejected into the double wall section to form the cooling flow. The wall temperature of the double-wall diffuser is lower than that of the single-wall diffuser. The average wall temperature goes down as the diffuser angle increases at the range of 0～5°,otherwise, the result at the range of 5～10° is opposite.关键词
混合流/壁面冷却/波瓣/引射器/同位网格Key words
mixing flow/wall cooling/lobe/ejector/co-located grid分类
航空航天引用本文复制引用
王锁芳,李立国,吴国钏..壁面冷却的三股混合气流的数值计算[J].南京航空航天大学学报（英文版）,2004,21(2):134-140,7.
