Numerical simulation and experimental methods were used to study the heat transfer characteristics of tip clearance flow in turbine shroud cavity.The impact of tip clearance flow Reynolds

outflow ratio of the front and rear holes and tip clearance on the heat transfer characteristics were simulated.Results show that the shroud rotational speed has little effect on heat transfer coefficient;the shroud heat transfer coefficient increases with the increase of leakage flow Reynolds number;heat transfer coefficient also increases with the increase of the outflow ratio of the front and rear holes

and the impact of the ratio of the front holes is larger;heat transfer coefficient increases with decrease of the tip clearance and the mean heat coefficient

increases faster with the decrease of tip clearance.The results show excellent agreement with the measurements and simulations

the error is less than 10%.