Gas ejection nozzle for a jet engine and a jet engine fitted wit

Details Gas ejection nozzle for a jet engine and a jet engine fitted wit Gas ejection nozzle for a jet engine and a jet engine fitted wit

1991-11-27

1993-05-18

Casaregola, Louis J.

Power plants

Reaction motor

Interrelated reaction motors

23926519, 60271, F02K 109

Patent

active

052110087

ABSTRACT:
The invention relates to an ejection nozzle with a variable outlet section for a jet engine. An axially moving annular skirt (4) is disposed about the fixed nozzle wall (2) so that it can be displaced axially between an upstream position in which the skirt is disposed retracted about the fixed wall (2) and a downstream position in which it projects to the rear of the outlet section of this wall. A semiflexible crown (8) is provided to ensure the connection between the moving skirt (4) and the fixed wall (2), this crown bearing elastically about the wall (2). The invention makes it possible in particular to increase the outlet section of a central hot gas nozzle so as to ensure a reduction of the hot jet thrust when the thrust reversers are applied on the cold jet. It also makes it possible in certain flight conditions, especially during take-off in hot weather, to reduce the temperature of the hot outlet gases and thus to increase the speed of the gas generator and increase the direct jet thrust.

REFERENCES:
patent: 2408099 (1946-09-01), Sherman
patent: 2570629 (1951-10-01), Anxionnaz et al.
patent: 3138921 (1964-06-01), Prince
patent: 3685738 (1972-08-01), Leibach et al.
patent: 3797785 (1974-03-01), Baerresen et al.
patent: 3829020 (1974-08-01), Stearns
patent: 3897001 (1975-07-01), Mason et al.
patent: 4383407 (1983-05-01), Inman
patent: 4807434 (1989-02-01), Jurich

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