公开(公告)号：US20170292528A1

公开(公告)日：2017-10-12

申请号：US15459878

申请日：2017-03-15

Applicant: ROLLS-ROYCE plc

Inventor： William J. BROWN ,  Christopher R P. HALL ,  Anthony M J. DICKENS ,  James V. TAYLOR

IPC: F04D29/32 ,  F01D5/14

CPC classification number: F04D29/324 ,  F01D5/141 ,  F05D2220/32 ,  F05D2240/301 ,  F05D2240/304 ,  F05D2250/70

Abstract: A blade for an axial flow machine having a pressure surface, suction surface and trailing edge. The blade has a cross-sectional aerofoil profile including: a region of maximum curvature corresponding to the trailing edge of the blade and defining a trailing edge radius of curvature r; a trailing edge region extending from the trailing edge and having a chordwise extent equal to curvature r′s trailing edge radius; a taper region adjacent the trailing edge region, the taper region having a chordwise extent greater than the curvature r′s trailing edge radius and no more than 15% of the blade's chord; a body region adjacent the taper region; a pressure surface boundary corresponding to the blade's pressure surface; and a suction surface boundary corresponding to the blade's suction surface. A thickness between the pressure and suction surface boundaries reduces within the taper region towards the trailing edge by at least 50%.