希薄予混合型ガスタービン燃焼器に関する研究(第3報) : 予混合気濃度の不均質性の影響

概要

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Among various low NO_x combusion technology proposed up to the present, the lean premixed combustion technology may be the most available and feasible for the continuous combustion systems to reduce NO_x emission remarkably. However, this technology has some restrictions in applying different from the conventional diffusion combustion technology. One of the restrictions is caused by the mixture non-uniformity. Fuel must be mixed with air just before the combustor to avoid flash-back and it causes non-uniformity of mixture which will bring the emission characteristics to the worse. The experiments were conducted to verify the influence of mixture non-uniformity on the emission characteristics using a model combustor which can settle the extent of mixture non-uniformity. The fluctuating concentration of the mixture flowing to the combustor was measured using a hot wire concentration probe for various unburned conditions. Mixture non-uniformity was quantified for the scale and intensity using the probability and statistical theory used for turbulent flow. Temperature and exhaust gas emission were measured to verify the influence of mixture non-uniformity (concentration fluctuation in this case) on them.
社団法人日本ガスタービン学会の論文
1995-03-10