Turbine blade with showerhead film cooling holes

摘要

A turbine rotor blade with a showerhead arrangement of film cooling air for cooling the leading edge of the airfoil, where the film cooling holes each includes a tear drop shaped opening that extends in a radial direction of the airfoil from the film hole breakout and functions to spread out the film layer of cooling air that is ejected from the holes so that a hot streak between holes along the pressure side row and the suction side row of film holes does not occur. The tear drop shaped opening have a shallow depth and include a divider wall extend down the middle to divide the opening.