Patent ID: 8568097
Filing Date: 2013-10-29
Classification: F01D,F05D

Abstract:
1. A turbine rotor blade comprising: an airfoil having a leading edge region and a trailing edge region, and a pressure side wall and a suction side wall both extending between the leading edge region and the trailing edge region; a five pass serpentine flow cooling circuit having a first upward flowing leg and a first downward flowing leg with a first tip turn connecting the first upward flowing leg and the first downward flowing leg, a second upward flowing leg and a second downward flowing leg with a second tip turn connecting the second upward flowing leg and the second downward flowing leg; and, a core print-out hole formed in the blade tip and having two inlets and one common outlet where one inlet is connected to the first tip turn and the second inlet is connected to the second tip turn.