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. 03, 2001
Filed:
Aug. 13, 1999
Jeffrey D Willis, Conventry, GB;
Rolls-Royce plc, London, GB;
Abstract
A three stage lean burn combustion chamber (,) comprises a primary combustion zone (,), a secondary combustion zone (,) and a tertiary combustion zone (,). Each of the combustion zones (,) is supplied with premixed fuel and air by respective fuel and air mixing ducts (,). The primary fuel and air mixing ducts (,) comprise first and second radial flow swirlers (,). The primary fuel injectors (,) inject fuel into the first and second swirlers (,). The primary fuel injectors (,) and the first and second swirlers (,) are arranged such the fuel to air ratio of the fuel and air flowing from the passages (,) of the first swirler (,) into the primary combustion zone (,) is different to the fuel to air ratio of the fuel and air flowing from the passages (,) of the second swirler (,) into the primary combustion zone (,). This produces an axial distribution of fuel in the primary combustion zone (,) which reduces the generation of harmful vibrations in the combustion chamber (,).