涡轮动叶凹槽叶尖流动传热机理及建模研究进展

According to the flow mechanism and organization method of squealer tip, the analysis of aerodynamic and heat transfer characteristics of squealer tip considering cooling, and the modeling of leakage flow of squealer tip were summarized. The results showed that the flow inside the cavity had an obvious effect on the heat transfer. There was a strong interaction between the cooling gas in the cavity and the leakage flow. Reasonable cavity shape and jet hole position can effectively improve the aerodynamic performance and reduce the heat load of the blade tip; The uncertainty of blade tip machining and aerodynamic parameters could significantly affect the performance of squealer tip. By modeling the vortex structure in the cavity, the performance prediction model of the squealer tip considering the compressibility of air jet was verified by experiment and numerical simulation results. The model can effectively evaluate the performance of the squealer tip and provide a reference for engineering design.