Patent ID: 8585365

Claim:
An air cooled turbine rotor blade comprising: an airfoil with a leading edge and a trailing edge and a pressure side wall and a suction side wall extending between the two edges; a leading edge impingement channel located along the leading edge of the airfoil; a row of trailing edge exit holes located in a trailing edge region of the airfoil; a first triple pass serpentine flow cooling circuit having a forward flowing direction and first and second legs located along the pressure side wall and in the mid-airfoil region with a third leg located in the leading edge region; a second triple pass serpentine flow cooling circuit having an rearward flowing direction and first and second legs located along the suction side wall and in the mid-airfoil region with a third leg located in the trailing edge region; a showerhead arrangement of film cooling holes on the leading edge of the airfoil and being connected to the third leg of the first triple pass serpentine flow cooling circuit; and a row of trailing edge exit holes connected to the third leg of the second triple pass serpentine flow cooling circuit.