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. 27, 2007
Filed:
Jun. 25, 2003
Anthony Pidcock, Derby, GB;
Desmond Close, Derby, GB;
Anthony Pidcock, Derby, GB;
Desmond Close, Derby, GB;
Rolls-Royce plc, London, GB;
Abstract
A gas turbine engine pre-diffuseris generally annular, including radially inner and radially outer wallsandand a generally cylindrical midlinedefined between the walls. The pre-diffuserincludes a central memberwhich forces air flowing through the pre-diffuserto separate, initially to be directed away from the midlinebefore subsequently being allowed to diffuse back towards the midline. The majority of the diffusion takes place on the walls of the central member and is thus in an inner region of the annulus of air ejected from the pre-diffuser to pass to the combustor. Any boundary losses therefore do not significantly effect air at the extremities of this annulus, this air being destined for the annuli of the combustor and requiring relatively high energy levels.