The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2013
Filed:
Oct. 12, 2006
William J. Mcvey, North Granby, CT (US);
William J. McVey, North Granby, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
(A) A turbofan engine () is provided that includes a spool (). The spool () supports a turbine () and is housed within a core nacelle (). A fan () is coupled to the spool () and includes a target operability line. The target operability line provides desired fuel consumption, engine performance, and/or fan operability margin. A fan nacelle () surrounds the fan () and core nacelle () to provide a bypass flow path () having a nozzle exit area (). A controller () is programmed to command a flow control device () for changing the nozzle exit area (). The change in nozzle exit area () achieves the target operability line in response to an engine operating condition that is a function of airspeed and throttle position. A change in the nozzle exit area () is used to move the operating line toward a fan stall or flutter boundary by manipulating the fan pressure ratio.