Turbine blade with showerhead film cooling slots

摘要

A turbine blade with a leading edge region of the airfoil having rows of film cooling slots each connected by one or more metering holes to a cooling air impingement cavity, where the film slots have both a convergent and a divergent shape. The side walls converge while the top and bottom walls diverge within each slot and form a very narrow but tall slot opening on the leading edge surface of the blade.

主权项

1. An air cooled turbine rotor blade comprising:
an airfoil with a leading edge region; a leading edge impingement cavity located in the leading edge region; a row of film cooling slots in the leading edge region extending along a spanwise direction of the airfoil; a metering hole connected each of the film cooling slots to the leading edge impingement cavity; each of the film cooling slots having two side walls that form a divergent cooling air flow; and, each of the film cooling slots having a top and bottom wall that form a convergent cooling air flow.