Patent ID: 9611865
Date: 2017-04-04
CPC Classifications: F02C,F02K,F04D,Y02T

Claim:
1. A bypass turbojet comprising: a fan wheel carrying blades and surrounded by an annular casing, the casing including air suction means for sucking air from an annular clearance formed between the casing and radially outer ends of the blades of the fan wheel, the suction means comprising an inlet including at least one inlet slot formed in an inside wall of the casing and connected to a suction channel extending downstream, wherein the blades of the fan wheel are upstream of a primary passage for a primary stream in which a low-pressure compressor and a high-pressure compressor are disposed, and a secondary passage for a secondary stream in which outlet guide vanes are disposed, wherein the inlet slot of the suction means is situated axially in register only with upstream portions of chords of the blades of the fan wheel at radially outer ends thereof so as to face the radially outer ends of the upstream portions of the chords of the blades of the fan wheel in a radial direction, wherein an outlet of the suction channel is provided in the annular casing axially downstream of the outlet guide vanes, and wherein the suction means comprises a suction pump housed in the casing.