The N-S equation was solved by the Fluent software.On the basis of Realizable turbulence model and orthogonal method

the cooling effectiveness of film with different hole patterns

blowing ratios and turbulence intensities was analyzed with CFD techniques to select the optimal cooling scheme.The results show that

hole pattern had the most dramatic influence on cooling efficiency

and then the turbulence intensity

blowing ratio has the weakest effect.When slotted cylindrical hole was applied with blowing ratio of 2.0and turbulence intensity of 15%

the film cooling efficiency reached the highest

which is 167% higher than the lowest value.For the plate using sister-hole cooling

the coverage area was small and the avenage cooling efficiency decreased with the increasing blowing ratio.The effective combination of hole and slot can inhibit the formation of vortex pair

thus to enhance the cooling efficiency.