予混合乱流伝ぱ火炎の微細構造に関する研究 : 微細構造モデルによるシュリーレン像の解析

概要

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To gain insight into the micro-structure of turbulent flame, and analysis of the schlieren-images of propagating flame has been made by a turbulent combustion zone model. Combustion experiments were made in a constant volume bomb, where the characteristics of the mixture (laminar flame thickness, laminar burning velocity and oxygen concentration) and the turbulence intensity were varied independently. The obtained schlieren-images showed that the wrinkling of flame front increased and the scale of the smooth area decreased as the turbulence intensity increased. The increased wrinkling has been explained by a superimposition of the schlieren-images of turbulent flamelets existing along the combustion zone thickness. In this analytical discussion, the turbulent combustion zone has been considered to be mixed with the wrinkled laminar flame zone and the distribnuted-islands flame zone, where each reaction rate has been determined by a Damkohler number and each characteristic reaction time.
一般社団法人日本機械学会の論文
1989-03-25