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采用非结构化网格和realizablek-ε紊流模型,求解三维N-S方程,对带60°肋和气膜孔矩形通道在入口雷诺数9×104,气膜孔总出流比为0.22时进行了换热特性的数值模拟。带气膜孔的壁面换热特性和实验数据吻合的很好,在此基础上,分析了其它各个壁面的换热特性。结果表明,带肋和气膜孔的通道流场非常复杂,扰流肋的存在使各壁面的换热都得到了增强,但增强幅度的差别较大。换热最强的区域并不是带肋的上下壁面,而是光滑的右侧壁面。
The unstructured grid and realizablek-ε turbulence model were used to solve the three-dimensional Navier-Stokes equations. The rectangular channel with 60 ° ribs and gas film holes was changed at inlet Reynolds number 9 × 104 and gas film hole total outflow ratio 0.22 Numerical simulation of thermal characteristics. The heat transfer characteristics of the wall with film holes coincide well with the experimental data. On this basis, the heat transfer characteristics of the other walls are analyzed. The results show that the flow field in the channel with ribbed and film holes is very complicated. The existence of the spoiler ribs enhances the heat transfer of each wall, but the difference of the enhancement amplitude is larger. The area with the most heat exchange is not the ribbed upper and lower walls but the smooth right wall.