通过与实验结果对比，系统评估了不同湍流模型表现出的性能；发现考虑能量反

By comparing with the experimental results, the system evaluated the performance of different turbulence models; it was found that the SST-helicity model, which takes into account the energy back transfer mechanism and introduces helicity correction, has better performance than the original SSTKW model, and improves the performance of the turbine tip leakage vortex. The prediction of turbulent non-equilibrium characteristics, the calculation results of flow and heat transfer are closer to the experiment; on the basis of combining the experimental data, an in-depth analysis of the tip leakage flow and heat transfer mechanism is carried out based on the numerical simulation results.

Compared with the experimental results, the performance of different turbulence models was evaluated, it was found that the SST-helicity model, which considered the energy inverse transmission mechanism and introduced helix correction, had better performance than the original SSTKW model, improved the prediction of the unbalanced turbulence characteristics of the turbine tip leakage vortex, and the flow and heat exchange calculation results were closer to the experiment.

Compared with the experimental results, the performance of different turbulence models is evaluated systematically. It is found that SST helicity model, which takes energy transfer mechanism into consideration and introduces helicity correction, is superior to the original sstkw model, and improves the prediction of turbulent unbalance in the leakage vortex of turbine tip, and the calculation results of flow and heat transfer are closer to the experiment; the base of combining experimental data Based on the numerical simulation results, the heat transfer mechanism of tip leakage flow is analyzed.<br>