Turbine airfoil with near-wall impingement and vortex cooling

摘要

A turbine airfoil includes a plurality of cooling modules formed on the outer surface of the airfoil wall and spaced along the pressure side and the suction side of the airfoil. Each cooling module includes a first diffusion cavity connected to the cooling supply cavity by a first metering hole to provide impingement cooling in the first diffusion cavity. On the sides of the first diffusion cavity are second and third vortex chambers connected to the first diffusion cavity by second and third metering holes. The first diffusion cavity and the two vortex chambers each include film cooling holes to provide film cooling to the airfoil wall. The cooling circuit provides an impingement cooling in series with vortex cooling in order to provide a more efficient cooling of the airfoil wall.