Patent ID: 7544044
Filing Date: 2009-06-09
Classification: F01D,F05D,Y02T

Abstract:
1. A turbine airfoil comprising: a pressure side wall exposed to a hot gas flow; a suction side wall exposed to the same hot gas flow, the suction side wall being directly opposite to the pressure side wall; a cooling air channel formed between the pressure side wall and the suction side wall; a plurality of rows of pin fins extending from the pressure side wall to the suction side wall within the cooling air channel; a first arrangement of trip strips extending between the pin fins on the pressure side wall within the cooling air channel and forming a W arrangement; a second arrangement of trip strips extending between the pin fins on the suction side wall within the cooling air channel and forming an M arrangement; and, the W arrangement of trip strips being radially offset from the M arrangement of trip strips to form an alternating arrangement of M and W trip strips in a radial direction of the cooling air channel.