20513 微小気泡燃焼器内の水素/空気予混合気の着火確率(OS1 反応性流れの基礎と応用へ向けた展開)

概要

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The micro bubble combustor where a micro or millimeter scale bubble plays a combustion chamber as well as an efficient heat transfer surface is investigated. The ignitability in a micro bubble combustor on hydrogen/air mixture is discussed in the present study, which is based on the experiment on the combustion efficiency and the probability of disengagement of bubble from tube end. The results of combustion efficiency indicate that the probability of disengagement of bubble on the mixtures with equivalence ratio 2.2 and 3.2 corresponds the ignitability. It is shown that the ignitability of the mixtures decreases from 100% to 0% as the mean diameter of bubble decreases from an upper critical value. This result indicates that near-wall chemical kinetics, i.e. low surface temperature and radical depletion characterize the reaction in the present micro bubble combustion chamber.
一般社団法人日本機械学会の論文
2005-03-17