Turbine blade platform with near-wall cooling

摘要

A turbine blade having a platform and an airfoil extending from the platform. The platform includes a plurality of pressure side cooling channels formed within the platform and extending from a location along the aft edge of the platform. Each cooling channel includes a supply hole connected to the box rim cavity formed below the platform. Each pressure side cooling channel opens into a diffuser positioned along the pressure side edge of the platform to discharge cooling air onto the suction side platform of an adjacent blade. The suction side of the platform has cooling channels with supply holes connected to the box rim cavity and discharge holes positioned along the aft edge of the platform. The pressure side and suction side cooling channels in the platform have a curvature substantially of the same curvature as the airfoil in order to cool the entire platform surface exposed to the hot gas flow.