涡轮工作叶片内冷通道换热特性数值模拟

采用非结构化网格和SST紊流模型,求解三维N-S方程,对带90°肋和气膜孔的矩形通道在入口雷诺数60000,罗斯贝数0.11,气膜孔总出流比为0.22时的三维流场进行了数值模拟。分析了通道旋转和静止时各个面的换热变化规律。结果表明,通道静止时,不但布置了粗糙肋的上、下壁面换热得到了增强,光滑的侧壁换热同样获得了增强;通道旋转时流场更加复杂,旋转所产生的二次流动使各个壁面的换热进一步增强。

Investigation of the heat transfer in the rectangular passage with ribs and film holes

Numerical simulation was conducted to investigate heat transfer in rectangular channel with both rib-roughened wall and film hole suctions at Reynolds number 60000,rotation number 0.11,suction ratio of 0.22.A finite volume method with unstructured meshes was used to solve the three dimensions compressible Navier-Stokes equations.The SST k-w model was selected carefully.The numerical results showed that the flow of the rotating passage with the ribs and film holes was very complex.Heat transfer was enhanced because of the ribs,the suctions of the film holes and the rotation of the passage.