Bypass jet engine with confluent nozzle, rotating members which control the bypass air flow and a thrust reverser which controls the variable exhaust area

A bypass jet engine with confluent nozzle for an aircraft:

• - comprising a central generator (1) which through its outlet orifice (2) emits a stream of hot gas, and annular bypass duct (4) which surrounds said central generator and through which a stream of relatively cold gas passes, said streams of hot and cold gas being freely confluent inside said nozzle, which extends said annular duct beyond the outlet orifice of said central generator to form a convergent nozzle, said annular bypass duct defining the confluence cross section in a plane of the outlet orifice (2) of the central generator;
• equipped with a thrust reverser comprising:
• at least two reverser doors (7), each of which is mounted so that it can pivot about a pivot pin (20) which is transverse to said streams from the jet engine and which is arranged close to the outlet orifice (9) of said confluent nozzle, so that each reverser door can occupy either a folded position in which said reverser door forms part of the cowling of said jet engine or part of the aircraft fuselage, or a deployed position in which said reverser door is arranged transversely to said streams, said reverser doors in the folded position forming at least that part of said confluent nozzle which is adjacent to its outlet orifice;
• and
• actuating means (31, 33) to make said reverser doors simultaneously adopt either their folded position or their deployed position;
• and
• comprising:
• controlled means (14) arranged at the periphery of said confluent nozzle, adjacent to the mouth of said annular bypass duct (4) and inside this nozzle, to vary said confluence cross section;
• means (23) for shifting the transverse pivot pins (20) of said reverser doors-both together and radially to said streams-when these doors are in the folded position, so as to vary the cross section of the outlet orifice (9) of said confluent nozzle, said means (23) of shifting the transverse pivot pins (20) of the reverser doors (7) reducing said cross section of the outlet orifice (9) of the nozzle when said controlled means (14) of varying the confluence cross section increase said confluence cross section and, conversely, increasing said cross section of the outlet orifice (9) of the nozzle when said controlled means (14) reduce said confluence cross section;
• and
• means (39) of mechanical coupling between said means (23) of shifting the transverse pivot pins (20) of the reverser doors (7) and said controlled means (14) of varying said confluence cross section, the action of said coupling means (39) being such that the confluence cross section is reduced when the cross section of the outlet orifice (9) of the nozzle increases, and vice versa.