Abstract
Even in these days, the better the efficiencies of gas turbines are required to be, the higher the temperature of turbine inlet gas becomes. Turbine vanes and blades exposed to hot gas must be cooled, therefore film cooling is widely applied to the recent gas turbines because of its high cooling effectiveness. However the prediction methodology of the film cooling effectiveness has not been established well until now. In this study, the film cooling flow on the flat plate from cylindrical holes which is most typical and basic test case is numerically simulated by LES. Blowing Ratio is set to 0.5 and 1.0, Density Ratio is set to 2.0, which are generally equivalent to those in actual engines. The results of the simulations show that LES calculation has good prediction capability for film cooling flows.
