Patent ID: 7690890
Filing Date: 2010-04-06
Classification: F01D,F05D,Y02T

Abstract:
1. A wall configuration of a radial wall facing a flow path of an axial-flow machine that comprises a blade row, the wall configuration comprising: a trough formed between a blade and another blade in the blade row and substantially extending in an axial direction of the blade row, the region where the trough is formed being axially between a leading edge and a trailing edge of the blade, a center line of the trough having a curvature in the same direction as a camber line of the blade, a maximum amplitude of the trough being located adjacent to a center of the blade in the axial direction or located between the center of the blade in the axial direction and the leading edge of the blade, and at least a part of the center line of the trough in a vicinity of the trailing edge of the blade being nearer to a suction surface of the blade than a maximum distance between the centerline of the trough and the suction surface of the blade, from a vicinity of the middle of the blade to a vicinity of the trailing edge of the blade.