Patent ID: 8398371
Filing Date: 2013-03-19
Classification: F01D,F05D

Abstract:
1. An air cooled turbine rotor blade comprising: a leading edge and a trailing edge with a pressure side wall and a suction side wall extending between the two edges; the blade having an airfoil with a lower span and an upper span; a first multiple pass serpentine flow cooling circuit located in the lower span and in a forward section of the airfoil; a second multiple pass serpentine flow cooling circuit located in the lower span and in an aft section of the airfoil; a third multiple pass serpentine flow cooling circuit located in the upper span and in a forward section of the airfoil; a fourth multiple pass serpentine flow cooling circuit located in the upper span and in an aft section of the airfoil; the third multiple pass serpentine flow cooling circuit being supplied with the cooling air from the first multiple pass serpentine flow cooling circuit; and, the fourth multiple pass serpentine flow cooling circuit being supplied with the cooling air from the second multiple pass serpentine flow cooling circuit.