Variable area fan nozzle with bypass flow

US9970387B2 · kind B2 · utility

Assignees

• ROHR, INC. · US
• GOODRICH ACTUATION SYSTEMS LIMITED · GB

Inventors

• Joel H. Frank · Village of La Jolla, US
• Norman John James · Chula Vista, US
• Shunshen Richard Wang · Chula Vista, US
• Bryant Lynoel McKleny · San Diego, US
• David Baer · San Jose, US
• Tony Jones · Bixby, US
• John Herbert Harvey · Wolverhampton, GB
• Peter Bacon · Derry, US
• Mark Hubberstey · Wolverhampton, GB
• Brett Wharton · Wednesbury, GB
• Neil C. Davies · Haaksweide, GB
• Stephen Roberts · Winchester, GB
• Steven Andrew Wylie · San Diego, US

Key dates

• Filing date: Aug 7, 2008
• Grant date: May 15, 2018
• Expiry date: May 4, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/18648
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The exit area of a nozzle assembly is varied by translating a ring assembly located at a rear of the engine nacelle. The ring may be axially translatable along the axis of the engine. As the ring translates, the trailing edge of the ring defines a variable nozzle exit area. Translation of the ring creates an upstream exit at a leading edge of the ring assembly. The upstream exit can be used to bleed or otherwise spill flow excess from the engine bypass duct. As the engine operates in various flight conditions, the ring can be translated to obtain lower fan pressure ratios and thereby increase the efficiency of the engine. Fairings partially enclose actuator components for reduced drag.