Sensibility analysis of the air inlet position in the rotating cavity

Fluid structure interaction numerical method was applied to investigate the influence of air inlet position on the cooling effect of the rotating cavity.And,in order to ensure the safety of the turbine disk,the cooling effect was evaluated by an engineering evaluation system,which includes resistance evaluation,heat transfer evaluation and stress distribution evaluation.The results show that,the air inlet position has a great influence on the fluid structure in the rotating cavity,which determines the heat transfer and the temperature distribution of the rotating disk.Furthermore,the thermal stress of the rotating disk related to the temperature gradient can be affected.With the rise of the inlet position,the frictional windage of the rotating cavity increases,the heat transfer of the windward of the disk slacks,and the stress level and the maximum value decline.Therefore,the change of the inlet position has an effect on the failure probability of the turbine disk from two aspects:the material affordability and the working stress.