Development of a dry low NOx combustor for 2MW class gas turbine is described, which has been co-conducted by Ishikawajima-Harima Heavy Industries Co., Ltd. and Tokyo Gas Co., Ltd. from 1994. This combustor is characterized by three stage, lean premixed combustion with coaxial burners operated by simple control system and non-film cooling, from which low NOx and high combustion efficiency within the wide region of load can be obtained. Component rig tests indicated NOx ≒10ppm (at 16% O2), combustion efficiency η c >99.8% could be obtained over load more than 50%.

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