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Turbofan engine nacelle with a grid-type thrust reverser comprising a flap control sector

A technology of engine nacelle and thrust reverser, applied in machine/engine, engine function, engine control, etc., can solve problems such as aerodynamic losses and performance problems, and achieve the effect of optimizing aerodynamic efficiency

Pending Publication Date: 2021-04-23
SAFRAN NASEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When the reverser is in the direct injection position, the control levers of the pivoting flaps that pass through the cold air annular flow path can cause performance issues because they create aerodynamic losses in the annular flow path

Method used

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  • Turbofan engine nacelle with a grid-type thrust reverser comprising a flap control sector
  • Turbofan engine nacelle with a grid-type thrust reverser comprising a flap control sector
  • Turbofan engine nacelle with a grid-type thrust reverser comprising a flap control sector

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Experimental program
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Embodiment Construction

[0033] Figure 1a , Figure 1b , Figure 2a and Figure 2b Shown is the rear section of the nacelle comprising thrust reversers arranged along the main axis, comprising upper and lower fixed beams 2 coupled to the aircraft, supported by links arranged in a vertical axial plane 4 surrounded by Internal fixation structure of a turbojet engine 6 .

[0034] An annular flow path 18 arranged around the internal fixed structure is formed on each side of the nacelle by the movable cowl 8 sliding rearwards.

[0035] Each movable hood 8 substantially supports at its front end a pivoting flap 10, each flap having a pivot axis 46 fixed tangentially towards the front of the hood so that when reaching Figure 1b The inner fixation structure 6 is shown tilted inwardly to close off the annular flow path 18 .

[0036] A control segment 12 forming an elongated curved rod is held in a transverse plane by guides 14 to slide in each cowl 8 in a tangential direction, the control segment coverin...

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Abstract

A turbofan engine nacelle comprising a thrust reverser system provided with at least one movable cowl (8) retracting towards a rear reverse-jet position, tilting pivoting flaps (10) which at least partially close an annular flow duct (18), and opening lateral openings of this annular flow duct equipped with reverser grids, each movable cowl (8) comprising a control sector (12) that slides in a transverse plane, a deflection device (20) linking a fixed part of the nacelle (2) to this control sector (12) in order to make it slide towards a reversal position when the movable cowl (8) retracts, and flap connecting rods (16) linking this control sector (12) to the pivoting flaps (10), which tilt these flaps (10), closing the annular flow duct (18), when the control sector (12) slides towards its reversal position.

Description

technical field [0001] The invention relates to a bypass turbojet engine nacelle comprising a cascade thrust reverser conveying a cold flow forward. Background technique [0002] Arranged along the longitudinal axis and surrounded by the nacelle, the turbojet engines used to motorize the aircraft receive fresh air from the front side and exhaust hot gases produced by the combustion of thrust-generating fuel from the rear side. [0003] A bypass turbojet comprises fan blades arranged in a ring around the engine, creating a considerable secondary flow of cold air along an annular flow path passing between the engine and the nacelle, which adds to the high thrust. [0004] Some nacelles include a thrust reverser system equipped with pivoting flaps at least partially closing off the annular flow path of cold air to direct the secondary flow radially outward by directing the secondary flow forward Through the open side opening of the nacelle to generate reverse thrust for brakin...

Claims

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Application Information

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IPC IPC(8): F02K1/72F02K1/76
CPCF02K1/72F02K1/763F05D2260/50F05D2260/52F05D2260/532F05D2260/56F05D2220/323F05D2270/051
Inventor 弗朗索瓦·贝列特杰罗姆·科尔法朱利安·范·登·德里斯舍
Owner SAFRAN NASEL