湍流模型对旋转状态下S型带肋回转通道内部换热特性的影响

本文主要应用数值模拟的方法研究了6种不同湍流模型，以及2种壁面函数对旋转状态下涡轮叶片S型带肋回转通道内部换热特性的影响，分析对比了S型带肋回转通道内部的流动规律，以及压力面和吸力面的换热情况。结果表明:在相同边界条件下不同湍流模型的计算结果有很明显的差别,并且不同的壁面处理函数对计算结果也是有很大的影响;某些湍流模型的计算值只是在某个局部区域较为理想，在尚无普适性较好的湍流模型的情况下,研究在不同计算域和不同计算模型下采用不同湍流模型和壁面处理函数的计算技术,是一种较好的可行的方案。

Influences of Turbulence Models on Heat Transfer of Rotating Ribber S-Bend Passage

In order to investigate comparatively the influences of six turbulence models and two wall functions on heat transfer of rotating turbine blade ribber S-bend passage,the flow rules of ribber S-bend passage are analyzed,and the heat transfer of pressure-wall and suction-wall are discussed.The results show that: the calculated results of different turbulence models differ a lot under the same boundary conditions,and different near wall treatment functions can have an effect on the calculated results.Some turbulence model’s calculated results are only satisfied in some area of the passage.However,in the absence of turbulence models with good universality,the calculation technique with different turbulence models and near wall treatment functions for different domain is a feasible solution in simulating the heat transfer of passage.