Patent ID: 9618008
Date: 2017-04-11
CPC Classifications: F04D,F05D

Claim:
1. A method of blowing air in a compression stage diffuser of a compressor of a gas turbine, the diffuser including two end plates enclosing a blade and an air flow from a leading edge to a trailing edge of the blade, the method comprising: coupling a blowing of air into an air passage, the air passage being upstream of the diffuser, via a blowing cavity at the leading edge with a withdrawal of air at a downstream portion of the air passage, the coupling including blowing the withdrawn air into the air passage from upstream to downstream, the blowing being oriented so that the withdrawn air flows along at least one of the blade and the end plates; and withdrawing the air from the air passage by suction into an intake opening, the intake opening being closer to the trailing edge than to the leading edge, and the withdrawn air is blown out via the blowing cavity in the leading edge of the blade to produce the coupling, so that a pressure of the air that is withdrawn is substantially higher than a pressure of air flowing in a region of the withdrawal, wherein the blade includes an upper surface corresponding to one of a pressure side or a suction side of the blade and a lower surface corresponding to the other of the pressure side or the suction side of the blade, the upper and lower surfaces extending longitudinally and substantially parallel to a mean surface of the blade, the leading edge and the trailing edge connecting the upper surface and the lower surface of the blade.