熱循環バーナによる超希薄混合気の実験的研究 : 火炎安定限界と火炎観察

概要

論文の詳細を見る
From the standpoint of effective use of fossil fuels, combustion of ultralean fuel gases by heat recirculating burners was discussed and the present situation of the related studies was described. An experimental study was carried out on the ultralean fuel gas combustion by using a burner equipped with an opposing-flow type heat exchanger having two concentric circular tubes. 1) A laminar flame, which was the so-called excess enthalpy flame, was stabilized. The flame appearances were observed by means of photography, or making sketches of them. 2) It was able to extend the lower limit of flame stability compared with the ordinary limit of flammability. 3) The limit of flame stability was not the limit resulted from a lowering of the ability of flame propagation, but the limit due to the increase of the mixture flow rate.
大同工業大学の論文