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:
Jul. 28, 2026
Filed:
Mar. 06, 2024
Applicant:
Rolls-royce Plc, London, GB;
Inventors:
Alastair D Moore, Derby, GB;
Robert J Telling, Derby, GB;
Assignee:
ROLLS-ROYCE plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02K 3/06 (2006.01); B64D 33/02 (2006.01); F02C 7/045 (2006.01); F02C 7/24 (2006.01); F02C 7/36 (2006.01); F02C 9/00 (2006.01); F02K 1/82 (2006.01); F02K 3/02 (2006.01);
U.S. Cl.
CPC ...
F02K 3/06 (2013.01); F02C 7/045 (2013.01); F02C 7/24 (2013.01); F02C 7/36 (2013.01); F02C 9/00 (2013.01); F02K 1/827 (2013.01); F02K 3/025 (2013.01); B64D 2033/0206 (2013.01); F05D 2260/12 (2013.01); F05D 2260/83 (2013.01); F05D 2270/333 (2013.01);
Abstract
A gas turbine engine generates noise during use, and one particularly important flight condition for noise generation is take-off. A gas turbine engine is provided that has high efficiency together with low noise, in particular from the fan and the turbine that drives the fan. Values are defined for a combined contribution of the turbine noise and the noise from the fan emanating from the front of the engine to the Effective Perceived Noise Level (EPNL) at take-off to be in the range of from 2 EPNdB and 15 EPNdB lower than the EPNL of the whole engine at take-off.