带交错肋结构涡轮叶片复合通道的实验

采用实验的方法,研究带交错肋结构和纵向隔板的涡轮叶片内冷通道的流动与换热.实验采用相变加热的方法,为模型实验件提供等壁温边界条件,实验在Re=10 000～60 000之间进行.实验模型采用了交错肋结构和扰流柱结构,分别与两种纵向隔板组合进行实验,以期望得到综合传热效果最优的组合.实验件的一侧外壁面被分成10个区域以期望了解实验件局部换热情况.实验结果表明:带交错肋结构的通道的换热效果好于带扰流柱结构的通道的换热效果.当Re<30 000时,综合传热性能最佳的是带波形隔板加交错肋0612组合结构的通道,当Re>30 000时,综合传热性能最佳的是带波形隔板加交错肋0412组合结构的通道. 

Experimental study on the turbine blade cooling channel with crossed-ribs

The characteristics of heat transfer and flow resistance in turbine blade cooling channel were studied experimentally with use of vapor heating method,which could provide the experimental model with equivalent wall temperature boundary condition.The experiments were carried out under the condition that the Re was 10 000～60 000.The experiment models adopted the structure of crossed-ribs,pin-fins and longitudinal dividers.The outside wall was divided into ten regions and the condensation vapor of the regions was gathered to get the local heat transfer coefficient.The results show that the crossed-ribs channel could lead to better heat performance than the pin-fins channel.The results also show that,in the case of Re<30 000,the structure with the best general heat transfer performance is crossed-ribs channel of 0612,and in the case of Re>30 000,the best one is crossed-ribs channel of 0412.