Patent ID: 8491264

Claim:
A turbine rotor blade comprising: a trailing edge region with a first radial flow cooling channel with a discharge opening on a trailing edge of the blade adjacent to a blade tip; a second radial flow cooling channel located adjacent to the first radial flow cooling channel, the second radial flow cooling channel having a discharge opening below the discharge opening of the first radial flow cooling channel; a third radial flow cooling channel located adjacent to the second radial flow cooling channel, the third radial flow cooling channel having a discharge opening below the discharge opening of the second radial flow cooling channel; a fourth radial flow cooling channel located adjacent to the first radial flow cooling channel and connected to a cooling air supply passage formed within a root section of the blade; a first row of metering holes that connect the fourth radial flow cooling channel to the first radial flow channel; a second row of metering holes that connect the first radial flow cooling channel to the second radial flow channel; and, a third row of metering holes that connect the second radial flow cooling channel to the third radial flow channel.