A-1 多段化による筒状火炎希薄予混合燃焼器の超低NOx作動範囲の拡大(燃焼・燃焼器I,一般講演)

概要

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All gas turbines operate at overall fuel lean conditions. Thus, lean premixed combustion is the most promising approach for ultra-low NOx emissions from gas turbines. Flame stability is worse and combustion is incomplete to produce high CO and HC emissions at very lean conditions where ultra-low NOx is achieved. Various concepts have been proposed to extend the limit of complete combustion to a leaner side. To overcome the problem we have proposed a new ultra-low NOx combustion concept, lean-lean multi-stage combustion, where lean to ultra-lean mixtures are injected into the hot product from the primary and secondary stage. In the present study, emissions and flame stability were investigated for two-stage and three-stage tubular flame combustor. Secondary mixture of various fuel concentrations was injected into the primary product and tertiary mixture into the secondary product through the tangential slots on a cylindrical combustor wall. The effects of air and fuel splits between stages on the emissions and combustion characteristics were investigate.
社団法人日本ガスタービン学会の論文
2004-10-01