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US 11,499,502 B2Granted
Dual function cascade integrated variable area fan nozzle and thrust reverser
AssigneeRaytheon Technologies Corporation
InventorRichard M. Marshall
Life of this patent
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Abstract
A gas turbine engine system according to an exemplary aspect of the present disclosure may include a core engine defined about an axis, a fan driven by the core engine about the axis to generate bypass flow, and at least one integrated mechanism in communication with the bypass flow. The at least one integrated mechanism includes a variable area fan nozzle (VAFN) and thrust reverser, and a plurality of positions to control bypass flow.
Claims24
A gas turbine engine comprising:
- an outer housing that extends circumferentially about a fan to establish a bypass passage extending between the outer housing and an inner housing;
- a low pressure compressor and a high pressure compressor, wherein the inner housing surrounds the low pressure compressor;
- a gear train defining a gear reduction ratio;
- a combustion section in communication with the low pressure compressor and the high pressure compressor;
- a high pressure turbine coupled for rotation with a first spool to rotationally drive the high pressure compressor;
- a low pressure turbine coupled for rotation with a second spool to rotationally drive the gear train, and the fan driven through the gear train;
- at least one integrated mechanism coupled to the outer housing, the at least one integrated mechanism including a variable area nozzle and a thrust reverser, the thrust reverser and the variable area nozzle having a common part;
- wherein the thrust reverser includes a cascade section having a first set of apertures angled in a first direction and a second set of apertures angled in a second, different direction;
- at least one actuator coupled to the at least one integrated mechanism;
- a controller that communicates with the at least one actuator to selectively move the common part between a plurality of axial positions in operation with respect to a centerline axis of the gas turbine engine, wherein the plurality of axial positions include a stowed position, an intermediate position and a deployed position;
- wherein the common part covers the cascade section in the stowed position, the common part is spaced apart from the outer housing in the intermediate position to provide an auxiliary passage and expose the first set of apertures, and the common part exposes the second set of apertures in the deployed position;
- wherein the common part includes a hollow sleeve that extends about the cascade section in the stowed and intermediate positions, and the thrust reverser includes a blocker door pivotably connected to the common part;
- and
- a link including a first portion slideably connected to the blocker door and a second portion connected to the inner housing, and wherein the blocker door includes a slot that receives and retains the first portion of the link.
11 more elements
A method of controlling a gas turbine engine comprising:
- providing an outer housing that extends circumferentially about a fan to establish a bypass passage between the outer housing and an inner housing;
- providing at least one integrated mechanism coupled to the outer housing, the at least one integrated mechanism including a variable area nozzle and a thrust reverser, the thrust reverser and the variable area nozzle having a common part, and the thrust reverser including a cascade section having a first set of apertures angled in an aft direction and a second set of apertures angled in a forward direction with respect to a centerline axis of the gas turbine engine;
- rotationally driving a low pressure compressor coupled to a low pressure turbine;
- rotationally driving the fan through a gear train coupled to the low pressure turbine;
- and
- moving the common part between a stowed position and an intermediate position to direct discharge bypass flow in the aft direction and enhancing operation of the fan;
- moving the common part between the intermediate position and a deployed position exposing the second set of apertures, and directing discharge bypass flow in the forward direction, generating a reverse thrust force, wherein the common part is spaced apart from the outer housing to provide an auxiliary passage and expose the first set of apertures in the intermediate position, but does not expose the second set of apertures in the stowed or intermediate positions;
- and
- pivoting a blocker door into the bypass passage in the deployed position, but not in the stowed or intermediate positions, to deflect discharge flow from the bypass passage radially outwards through the auxiliary passage with respect to the centerline axis, wherein a link includes a first portion slideably connected to the blocker door and a second portion non-slideably connected to the inner housing.
6 more elements
Dependencies are inferred from the claim text.