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:
Aug. 27, 2019
Filed:
Nov. 25, 2016
Applicant:
Rolls-royce, Plc, London, GB;
Inventors:
Angus R Smith, Derby, GB;
Christopher T Sheaf, Derby, GB;
David G MacManus, Buckingham, GB;
Robert E Christie, Cranfield, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 25/24 (2006.01); F01D 9/02 (2006.01); B64D 33/02 (2006.01); F04D 29/52 (2006.01); F02C 7/04 (2006.01); F01D 25/04 (2006.01); F04D 29/66 (2006.01);
U.S. Cl.
CPC ...
F01D 25/24 (2013.01); B64D 33/02 (2013.01); F01D 9/02 (2013.01); F01D 25/04 (2013.01); F02C 7/04 (2013.01); F04D 29/526 (2013.01); F04D 29/664 (2013.01); B64D 2033/0226 (2013.01); F05D 2220/323 (2013.01); F05D 2270/17 (2013.01); Y02T 50/671 (2013.01);
Abstract
A nacelle for a turbofan gas turbine engine, having in flow series an intake lip, a diffuser and a fan casing. The diffuser has, in flow series, a main section and a recessed section adjacent to the fan casing. A transition region, such as a step, slope or curve, is provided between the main section and the recessed section. In some arrangements the transition region may be configured to promote flow separation and the formation of a separation bubble in the recessed section.