Turbine blade with tip rail cooling channel

摘要

A turbine rotor blade with a main spar and a thin thermal skin bonded to form an airfoil surface for the blade. The blade includes radial extending cooling channels formed on the pressure side and suction side walls between the spar and the thermal skin. The P/S radial channels connect to a P/S tip cooling channel and the S/S radial channels connect to a S/S tip cooling channel. The tip cooling channels are connected to tip floor cooling channels that discharge into a cooling air collection cavity formed within the spar. A row of exit holes in the trailing edge are connected to the cooling air collection cavity.