Abstract: By analyzing the methods of calculating different heat transfer coefficients,the film cooling relative heat transfer coefficients was used to calculate the heat transfer.After six different discrete hole board being experimented,the model of heat transfer of discrete hole board film cooling was established.The effects on the film cooling heat transfer coefficients of the gas parameters of the flow and the geometric parameters of the discrete hole board were analyzed,and the transfer coefficients were obtained.Some useful conclusions such as the effects of the percent of the discrete hole area to the transfer coefficients were obtained.

Key words: discrete hole board, film cooling, heat transfer, wall cooling