Optimal Heat Flux Reduction Inside Film Cooled Wall

This work is devoted to search for the global extreme of heat flux reduction into the film cooled wall. It was carried out by varying five main system parameters from a combination of the lateral average of both the adiabatic effectiveness and the heat transfer coefficient. The lateral average heat flux reduction is processed according to the IOSO technology. It yields a prediction of the heat transfer coefficient from the ejection position to far downstream, including effects of extreme blowing angles and hole spacing. Together with the calculation of the adiabatic effectiveness it provides an immediate determination of the stream wise heat flux reduction distribution of cylindrical hole film cooling configurations.