초록 ▼

An adjustable two-dimensional nozzle is disclosed in which simplified control means are located away from the flow of gasses through the nozzle. The nozzle includes a movable frame located outside of fixed sidewalls and has pivotally attached thereto a pair of upstream or converging nozzle flaps. Up

An adjustable two-dimensional nozzle is disclosed in which simplified control means are located away from the flow of gasses through the nozzle. The nozzle includes a movable frame located outside of fixed sidewalls and has pivotally attached thereto a pair of upstream or converging nozzle flaps. Upstream edges of the upstream flaps are attached to the movable frame such that the flaps pivot about axes extending substantially perpendicular to the longitudinal axis of the nozzle. Downstream or diverging flaps are attached to the downstream edges of the upstream flaps such that these flaps also pivot about axes extending substantially perpendicular to the longitudinal axis of the nozzle. A cam member extends between each of the movable frames and each downstream flap to control the angular variations of the flaps during movement of the frame. The flap arrangements are symmetrically arranged with respect to a plane passing through the longitudinal axis of the nozzle, such that translational movement of the frames will alter the cross-section of the nozzle in a symmetrical manner with respect to the plane. If the frame is rotated about its pivot attachment, the nozzle flaps will be asymmetrically adjusted and may be utilized to vector the thrust of the gasses emanating from the nozzle.

대표청구항 ▼

An exhaust nozzle for a gas turbine engine having a longitudinal axis and a generally rectangular cross-section comprising: (a) a first pair of opposite, fixed sides; (b) a second pair of opposite, movable sides to vary the nozzle cross-section and the direction of gasses passing through the nozzle,

An exhaust nozzle for a gas turbine engine having a longitudinal axis and a generally rectangular cross-section comprising: (a) a first pair of opposite, fixed sides; (b) a second pair of opposite, movable sides to vary the nozzle cross-section and the direction of gasses passing through the nozzle, each second pair of movable sides comprising: (i) an upsream flap extending between the fixed sides having an upstream edge and a downstream edge; and, (ii) a downstream flap having an upstream edge pivotally attached to the downstream edge of the upstream flap at a first point; (c) at least one thrust reversing flap movable between open and closed positions; and, (d) a control system located on both sides of the nozzle for controlling the angular positions of the upstream flaps, the downstream flaps and the at least one thrust reversing flap each control system comprising: (i) a frame attached to a fixed side so as to be movable in a direction substantially parallel to the longitudinal axis of the nozzle and to pivot about a pivot axis extending substantially perpendicular to the longitudinal axis; (ii) actuating means connected to the frame; (iii) cam members defining cam surfaces, each cam member having a first portion attached to the frame at a second point and a second portion attached to a downstream flap at a third point; (iv) stationary cam rollers attached to the fixed sides, operatively contacting the cam surfaces; and (v) hinge means pivotally attaching the upstream edge of the upstream flaps to the frame at a fourth point such that the upstream flap pivots about an axis extending generally perpendicular to the longitudinal axis; whereby lines interconnecting the first, second, third and fourth points, in a plane of a fixed side form a quadrilateral having two opposide sides of different lengths.