Patent ID: 9033668
Filing Date: 2015-05-19
Classification: F01D,F02C,F02K,F04D,F05D,Y02T

Abstract:
1. A combined fan-compressor impeller, comprising a single hub and a plurality of spaced main blades extending outwardly from said hub, an air passage channel being defined between two of said main blades, wherein each of said main blades is a mixed flow blade which continuously extends from a fan section at an inlet end of a channel to a compressor section at an outlet end of said channel without any axial clearance between said fan section and said compressor section, thereby providing aerodynamic matching of pressurized air flowing through said channel from said fan section to said compressor section, and which is configured with an interface line at a hub-blade interface that has a smaller angle relative to an axis of rotation adjacent to said inlet end than in a direction towards said outlet end, and with a three-dimensional blade profile having a variable blade angle between a blade surface and said axis of rotation.