Turbine airfoil with leading edge cooling

摘要

An air cooled turbine blade with a leading edge region cooling circuit that includes a row of vortex chambers connected to a cooling air supply cavity, with each vortex chamber connected to a showerhead arrangement of metering and curved diffusion holes that meter and diffuse cooling air prior to discharge onto the blade surface. Thin metering slots supply cooling air to the vortex chambers to promote a vortex flow. The vortex chambers and metering and curved diffusion holes are formed from a metal printing process that cannot be formed using a ceramic core with an investment casting process.

主权项

1. An air cooled turbine blade comprising:
a leading edge region; a pressure side wall and a suction side wall extending from the leading edge region; a cooling air supply cavity located adjacent to the leading edge region; a vortex chamber located between the leading edge of the blade and the cooling air supply cavity; a metering slot connecting the cooling air supply cavity to the vortex chamber; the metering slot having a width greater than a height in a spanwise direction of the turbine blade; and, a metering and diffusion hole connected to the vortex chamber with an outlet opening onto a surface of the leading edge region of the turbine blade.