Effect of Film Cooling on Turbine Capacity

This paper describes a method that allows the effect of film cooling on the capacity of a turbine to be computed. The model is based on fundamental cooling performance parameters and is applicable to situations in which a mainstream flow is displaced by a partially mixed film cooling layer. The purpose is to quantify the error that is incurred in the engine situation when common-but simplified-assumptions are made regarding the flow, and where necessary, to provide a means of correcting the capacity for the effect of the film cooling flow.