Abstract: A numerical method of predicting the film cooling effect on the wall temperature of a combustion chamber is presented. In the calculation,the k ε double equation model for turbulence,wall function for the neighbourhood of the solid wall,harmonic average method for the conductivities at the interface of two different media and the heat flow due to the heat radiation are adopted or taken into consideration. The flow field,temperature field and the characteristic of flow and heat transfer are obtained,which shows a fairly good agreement with some experimental results.