带顶部出流孔U型通道的流阻与换热研究  

Study on Flow Resistance and Heat Transfer of U-shaped Channel with Tip Bleed in Gas Turbine Blade

作　　者：耿峰 王龙飞 GENG Feng;WANG Longfei(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2021年第4期174-177,共4页Machine Building & Automation

基　　金：省部级项目(KF7)。

摘　　要：内冷通道与叶尖冷却均匀是保障燃气轮机涡轮叶片安全稳定运行的关键技术,带顶端出流孔的U型通道作为这两个冷却技术相结合的产物,极具研究价值。为分析单个顶端出流孔的不同空间位置对U型通道流动换热特性的影响,采用数值仿真的方法展开研究。研究结果显示:当顶端出流孔处于通道回转段出口侧时,流动性能下降了约15%,但换热系数显著提高,综合热性能系数提升了6%。Internal cooling channels and blade tip cooling are the key technologies ensuring the safety and stablility of gas turbine turbine blades.The U-shaped channel with a top outflow hole as a product of the combination of these two cooling technologies is of great research value.In order to analyze the influence of the spatial position of a single tip bleed hole on the flow and heat transfer characteristics of a U-shaped channel,numerical simulation is used to carry out the research.According to the results,when the tip hole is on the outlet side of the channel turning section,the flow performance decreases by about 15%,but the heat transfer coefficient is significantly improved,with the thermal performance function increaing by 6%.

关 键 词：顶部出流孔 U型冷却通道 数值计算 燃气轮机 涡轮叶片 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]