B-3 LNG焚きH25ガスタービン用ドライ低NOx燃焼器の要素技術開発(ガス燃焼,一般講演)

概要

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Dry low NOx combustor for the Hitachi H25 gas turbine, which is composed of multiple coaxial fuel/air nozzles, has been developed. This burner is named "Multi Cluster Nozzle Burner". In this study, the combustion characteristics of an model burner which has same structure as outer burner of the Multi Cluster Nozzle Burner were investigated. As fuel ratio of fuel nozzles on the 1st circumference was turned down to make the flow rate distribution uniform, NOx emission was reduced. But in some cases the flame lifted, or in other cases the combustion oscillation increased sharply due to the flame stick on the whole surface of swirl plate before becoming uniform. The Multi Cluster Nozzle Burner was also tested under medium pressure condition (0.7MPa) at the combustor exit gas temperature of 1300℃. NOx emission at the full load condition in the H25 gas turbine was supposed to be 6.7ppm(15%O_2).
公益社団法人日本ガスタービン学会の論文
2010-10-20