Patent attributes
A turbine rotor blade with a trailing edge cooling circuit in which cooling air from an impingement cavity located adjacent to the trailing edge region is connected to a plurality of metering channels that open onto the pressure side wall of the trailing edge region of the airfoil to discharge the cooling air. A row of submerged slots that open onto the suction side wall of the airfoil are connected to the metering channels by a row of small holes that bleed off the cooling air in the metering channel in a progressive manner and discharge the air into the slot. The trailing edge cooling circuit allows for a thinner trailing edge airfoil, reduces the metal temperature and reduces the shear mixing between the cooling air and the mainstream hot gas flow.
