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平行肋扰流通道是高温透平叶片常用的冷却结构。本文通过批量(约1000次)的气热耦合数值计算对不同几何结构平行肋扰流冷却通道的流动与耦合传热特性进行研究.对于固定压差通道,存在使固体外壁温度最低的肋片布置形式及对应的最优冷气量,针对某重型燃机动叶设计了不同肋片角度的平行肋扰流冷却通道并进行了气热耦合数值计算,表明60°肋能在最小的冷气量下取得最强的换热,验证了机理研究的结论.
Parallel ribbed flow channel is commonly used in high-temperature turbine blade cooling structure. In this paper, we study the flow and heat transfer characteristics of parallel cooling flow channels with different geometries by means of batch (about 1000) heat and air coupling numerical calculations. For a fixed differential pressure channel, there is a rib arrangement that minimizes the solid outer wall temperature Form and the corresponding optimal cooling capacity, a parallel ribbed cooling channel with different rib angles was designed for a heavy-duty turbine lobe and the numerical calculation of air-heat coupling was performed. It shows that the 60 ° rib can be obtained with the minimum air-cooling capacity Strong heat transfer, verify the conclusions of the mechanism of research.