The numerical simulation was used to study the film cooling effectiveness of plate with jet holes by increasing the heat transfer of wall of hole and enlarging the cooled area of plate in the side of hot gas stream.By studying different shape of jet holes

a new shaped hole(conical shrink entrance and conical diffuser exit shaped hole) was proposed.The computational results show that

the conical shrink entrance of the new shaped hole can efficiently enhance the convection heat transfer of wall of hole

and the conical diffuser exit of the new shaped hole can efficiently enlarge the cooled area of plate in the side of hot gas stream.If comparing with the conical diffuser shaped hole

it is found that

when the shrinkage hole is used

the film cooling effectiveness of plate is enhanced with low blowing ratio

and the film cooling effectiveness is inferior with high blowing ratio.However

when compared with the cylindrical hole

when the new shaped hole is used

the film cooling effectiveness of plate can be improved in any case.