過濃予混合火炎を用いた超小型水素ガスタービン用燃焼器に関する研究 : 最適燃焼条件と試験燃焼器の燃焼特性

概要

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The application of a two-staged combustion method to a hydrogen combustor for a micro-gas turbine was examined. Using a calculation model, which assumed a first and secondary reaction zone well stirred reactor, numerical simulations were conducted to find optimum combustion conditions. The results showed that good emission performance was attained in the model when the equivalence ratio at the first-stage was about 2.0. Based on the results, micro-gas turbine test combustors with a swirl-type injector that issued rich premixtures were built and combustion tests of the combustors were performed at atmospheric pressure. Stable rich premixed flames were formed in the combustor, however NOx emission levels were rather high at the equivalence ratio estimated by the calculation. It was cleared that whether the flame base attached to the injector opened or not greatly influenced the flame configuration, the temperature distribution in the combustor and the emission performances in the experiment.
社団法人日本ガスタービン学会の論文
2003-07-20