AFTERBODY FOR A TURBOJET ENGINE COMPRISING A NOZZLE PROVIDED WITH A THRUST REVERSER SYSTEM THAT INCORPORATES A CROWN OF NOISE-REDUCING CHEVRONS

摘要

An afterbody for a turbojet engine having a central axis, provided with a nozzle comprising two doors mounted facing each other between two lateral beams pivoting around axes defining a pivot direction, between a retracted position, in which a middle portion of the downstream edge of said doors forms the edge of the outlet section of the nozzle combined with the downstream edges of the two lateral beams, and a deployed position, in which said middle portions of the downstream edges of the pivoting doors come together so as to block the channel between the two lateral beams in order to reverse the thrust of the turbojet engine gases, the edge of the outlet section of the nozzle further having a crown of noise-reducing chevrons alternating with indentations and the afterbody wherein each noise-reducing chevron formed on the middle portion of the downstream edge of a pivoting door is opposite an indentation in the middle portion of the other pivoting door in the direction perpendicular to said pivot direction, the shapes of the chevrons and of the indentations being defined to match in such a way that each chevron fits into the opposing indentation when the pivoting doors are deployed.

主权项

1. Afterbody of a turbojet engine having a central axis, which is equipped with an exhaust nozzle comprising two doors which are mounted opposite one another between two lateral beams, and pivot about shafts defining a pivot direction, between a retracted position, in which a middle portion of the downstream edge of said doors forms the edge of the output portion of the exhaust nozzle in combination with the downstream edges of the two lateral beams and a deployed position, in which said middle portions of the downstream edges of the pivoting doors join together to block the channel between the two lateral beams in order to reverse the thrust of the gases from the turbojet engine, the edge of the output portion of the exhaust nozzle further comprising a ring of noise-reduction chevrons alternating with indentations, said ring being arranged in such a way that each noise-reduction chevron formed on the middle portion of the downstream edge of a pivoting door is opposite an indentation in the middle portion of the other pivoting door in the direction which is perpendicular to said pivoting direction, said afterbody being arranged in such a way that, when the doors are in the deployed position, the chevrons of a door interlock with the indentations of the opposite door without any overlapping of the middle downstream edges of the doors.