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. 13, 2002
Filed:
Sep. 09, 1999
Jakob Keller, late of Wohlen, CH;
Alstom, Paris, FR;
Abstract
The devices and methods according to the invention are used to attenuate acoustic and/or thermoacoustic oscillations in a combustor. The combustor may be, in most cases, constructed as a premixing combustor with low emissions of noxious substances and includes a fluid supply device, an antechamber, a premixing device, and a combustion chamber. The fluid is supplied to the combustion chamber completely or almost completely through the front panel located in the front. The combustion chamber has at least one recirculation opening for attenuating the oscillations. It is furthermore advantageous that an attenuation volume and an injector be provided. The recirculation opening preferably merges at least in part with the attenuation volume. By means of the injector, the combustor is supplied with a more compressed fluid in order to ensure an adequate and clear pressure drop across the combustor.