COMPARISON OF DIFFERENT 2-EQUATION TURBULENCE MODELS FOR PREDICTION OF FILM COOLING FROM 2 ROWS OF HOLES

The present investigation involves the prediction of film cooling from two rows of holes using different turbulence models. Predictions of film cooling effectiveness and the velocity field from two rows of holes inclined in the streamwise direction are presented using the k-omega model and a modified version of it, as well as the standard k-epsilon model together with its nonisotropic version. Comparison between the predicted results using these models and previous experimental results indicates that the ability of a turbulence model to predict the experimental results depends heavily on the blowing rate as well as on the distance downstream from the injection holes.