Propfan turbine engine
AssigneeMTU Motoren und Turbinen-Union Muchen GmbH
InventorHubert Grieb
Life of this patent
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Abstract
A propfan turbine engine for an aircraft has a shroud and on the leading edge of the shroud, has one or several, preferably two, separate sector-like annular profile parts which via actuating devices can be moved from the shroud such that slots can be formed between the profile parts and the shroud. This arrangement prevents dangerous air-flow separations on the outside of the upper shroud region and on the inside of the lower shroud region at large angles of attack of the aircraft engine for both high and low power operation.
Claims8
A propfan turbine engine for aircraft having a shroud surrounding propfan blades, comprising:
- an annular leading edge of said shroud including a separate profile part forming an upper continuous annular section having an arc greater than 30.degree. as a part of said leading edge;
- means for actuating coupled to said separate profile part to vary the position of said separate profile part with respect to said shroud;
- a single continuous annular slot-like duct formed between said profile part and said shroud when said separate profile part is in an extended position, wherein said profile part in the upper annular section and the leading edge of said shroud are designed such that the resulting slot-like duct extends along a radially outward and downstream path when viewed on its side pointing away from the leading edge.
Dependencies are inferred from the claim text.