Heat Transfer Prediction in High Pressure Turbine Cascade with Free-Stream Turbulence using LES

摘要

The effect of inlet turbulence on heat transfer and boundary layer development on a high pressure turbine vane cascade is studied numerically using high-order overset Large Eddy Simulation. The LES calculation models an experiment by Arts et al (1990). The simulated blade loading and heat transfer profiles are in excellent agreement with experimental data. The leading edge region and pressure side of the blade surface have highly elevated levels of heat transfer in the presence of free-stream turbulence. Transition of suction surface boundary layer is captured in the simulation with the predicted transition location close to that observed in the experiment. A fully turbulent boundary layer is seen post transition on the suction surface.