F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 27/02 (2006.01) F01D 17/08 (2006.01) F01D 17/12 (2006.01) F02C 9/18 (2006.01) F04B 49/035 (2006.01) F04B 49/24 (2006.01) F04D 15/02 (2006.01)
Patent
CA 2715606
The invention relates to a passive leakage device for an axial turbomachine, more particularly for a low-pressure compressor of an axial turbomachine, the device being adapted to reduce and/or eliminate the surging phenomenon within the machine. It comprises an insert (2) having a general cylindrical shape with a flange (8) at one end and a bottom or membrane (6) at the other end. The membrane comprises two cross--shaped notches, these notches being adapted to enable a deformation of the membrane under a pressure exceeding a predetermined threshold so as to allow a leakage to go through the membrane. Several inserts (2) are arranged through the wall (12) of a compressor casing, distributed over one or several circumferences of the casing, facing one or several rows of rotor blades. In the case of a double- flow turbomachine such as a jet engine, the beak for separating the primary and secondary flows is used to form a chamber for communication between the inserts and for compensation with the pressure present in the secondary flow.
Hill & Schumacher
Techspace Aero S.a.
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