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:
May. 10, 2005
Filed:
Mar. 07, 2003
Shigeru Hayashi, Tokyo, JP;
Hideshi Yamada, Tokyo, JP;
Shigeru Hayashi, Tokyo, JP;
Hideshi Yamada, Tokyo, JP;
National Aerospace Laboratory of Japan, Tokyo, JP;
Abstract
The present invention provides a gas turbine combustor which makes it possible to achieve both a high combustion efficiency and low NOx emissions characteristics over a wide output power range without using a device that can vary the flow rate of the air used for combustion, by burning a lean mixture using high-temperature burned gas. The gas turbine combustorcomprises pre-mixture injection tubeswhich conduct a mixture of fuel and air into a combustion chamber. The mixture from the pre-mixture injection tubesis injected toward burned gaspresent on the downstream side of the flame, which is injected from burnersthat open into the combustion chamber, and this mixture is mixed with the burned gas. Even in a mixture which is leaner than the lower limit of inflammability, the radicals in the burned gasare effective in initiating reactions, so that the combustion of the mixture can be started. Since the burned gas has a lower oxygen concentration than fresh mixture, and since the pre-mixture is dispersed in space, the generation of NOx can be suppressed.