Turbine blade with near wall cooling

Abstract

A turbine blade with a plurality of near wall cooling channels on both the pressure side wall and suction side wall of the blade, and a plurality of tip cooling channels that open into a concave impingement cavity formed on the upstream side wall of a squealer tip rail that extends from the trailing edge and along the suction side wall of the blade, around the leading edge and ends on the pressure side wall just past the leading edge. The tip cooling channels provide cooling for the blade tip and inject the spent cooling air into the concave impingement cavity which then redirects the spent cooling air toward the oncoming hot gas flow leakage to produce a cushion against the hot gas flow to push the flow up and over the tip. Cooling air from a root supply cavity flows up through the plurality of suction side cooling channels to provide near wall cooling for the blade, then discharges into a cooling air collector cavity formed between the pressure and suction side walls. The cooling air then migrates toward the platform and then flows into the pressure side wall cooling channels to provide near wall cooling, and then into the tip cooling channels before discharging into the concave tip cavity that extends along the tip rail.

Dependencies are inferred from the claim text.