For the problem that tip clearance of the high pressure turbine rotors has a significant effect on the aerodynamic characteristic and structural reliability

numerical simulation based on conjugate heat transfer method of turbine rotors with different tip clearance sizes was performed. Coupled caculation of the energy transferred from physical interface between fluid and solid was made. The effects of leadage vortex flow on the distribution of temperature and pressure were presented

and the effects of thermal stress and aerodynamic stress on the structure intensity of blades were analyzed. It showed that

with the increase of tip clearance height

the leakage flow velocity increased and the thermal stress changed significantly. The maximum equivalent stress increased by 2.6% increase while the tip clearance height changed from 0.3% to 3.0%. The acquired results can provide a theoretical basis for tip clearance control.