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. 30, 1988
Filed:
Oct. 14, 1986
Nobuyuki Iizuka, Hitachi, JP;
Yoji Ishibashi, Hitachi, JP;
Isao Sato, Hitachi, JP;
Fumiyuki Hirose, Hitachi, JP;
Hiroshi Inose, Hitachi, JP;
Katsukuni Hisano, Hitachi, JP;
Katsuo Wada, Hitachi, JP;
Seiichi Kirikami, Hitachi, JP;
Michio Kuroda, Hitachi, JP;
Yoshihiro Uchiyama, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A combustor of two-stage combustion type in which fuel is supplied only from primary fuel nozzles for combustion only in primary combustion chamber under the operating condition where gas turbine load is low, and premixed mixture is supplied into a secondary combustion chamber provided on the downstream side of the primary combustion chamber for combustion in both the primary and secondary combustion chambers under the operating condition where the load is high. An air-bleed passageway opens on a downstream side of air holes for intaking secondary combustion air to be mixed with secondary fuel and communicates with the outside of the combustor. The air-bleed passageway is provided with a regulating valve and the secondary combustion air is bled at the minimum point of the load where the secondary fuel is supplied so that the fuel to air ratio of secondary premixed mixture may not be excessively lean, thereby reducing the production of non-burned components.