Patent ID: 7387492
Filing Date: 2008-06-17
Classification: F01D,F05D,Y02T

Abstract:
1. A method for fabricating an airfoil for use with a turbine blade, said method comprising: forming a substantially solid ceramic airfoil core; inserting the core into a die; casting the airfoil with a pressure side wall and a suction side wall connected together at a leading edge and a trailing edge, such that a plurality of first trailing edge slots, a plurality of second trailing edge slots, and a plurality of third trailing edge slots extend from the trailing edge along the pressure side wall, wherein each of the second trailing edge slots has a length, measured between an inlet and an exit of the slot, that is longer than a corresponding length of each of the plurality of first and third trailing edge slots, and wherein the plurality of second and third trailing edge slots are arranged in an alternating pattern.