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:
Oct. 10, 2006
Filed:
Apr. 26, 2004
Applicant:
Shahrokh Shahpar, Derby, GB;
Inventor:
Shahrokh Shahpar, Derby, GB;
Assignee:
Rolls-Royce plc, London, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A stator vane assembly for a turbomachine comprising a plurality of circumferentially arranged stator vanes (), the axial position of the stator vanes () and/or the pitch angle circumferentially between adjacent stator vanes () is varied circumferentially around the stator vane assembly. The stator vane assembly reduces the pressure distortion upstream of the fan outlet stator vanes (), reduces the circumferential pressure variation and this reduces blade forced response excitation, noise generation and aerodynamic losses.