公开(公告)号：SG116582A1

公开(公告)日：2005-11-28

申请号：SG200501576

申请日：2005-03-15

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DOMINIC MONGILLO ,  GREGG SHAWN J ,  RUTHANN MERCADANTE

IPC: F01D20060101 ,  F01D5/00 ,  F01D5/12 ,  F01D5/14 ,  F01D5/18 ,  F01D9/02 ,  F01D25/12 ,  F02C7/00 ,  F02C7/16

Abstract: A hollow airfoil (22) comprises a leading edge wall portion (42), a plurality of cavities (48,50,52), one or more crossover ribs (46), a plurality of cooling apertures (54), and a plurality of impingement apertures (56). The cavities are disposed adjacent the leading edge wall portion (42), between the leading edge wall portion (42) and a first rib (44). The crossover ribs (46) extend between the leading edge wall portion (42) and the first rib (44), and at least one crossover rib (46) is disposed between a pair of the cavities (48,50,52). The cooling apertures (54) are disposed in the leading edge wall portion (42), providing a passage through which cooling air can exit the cavities. The impingement apertures (56) are disposed in the first rib (44), providing a passage through which cooling air can enter the cavities. At least one of the impingement apertures (56) is contiguous with one of the crossover ribs (46).