拡散火炎から予混合火炎への乱流火炎構造の変化

概要

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This study presents in detail the turbulent heat transport mechanisms for spatial gradient of time mean temperature in the diffusion and premixed flames. The flame structures are influenced by many factors such as Reynolds number, flow conditions, excess air ratio, type of fuel, etc.. At high Reynolds numbers, the diffusion flame looses its characteristic structure and shows similar structure to that of premixed flame. At proper Reynolds numbers the flame still retains the diffusion flame characteristic which is suitable to study the interference between mixing and chemical reactions. These characteristic turbulent quantities were measured by combination of a Laser Rayleigh Spectroscopy (LRS) and a Laser Doppler Velocimetry (LDV). The distribution of turbulent heat fluxes [numerical formula] and [numerical formula] in the flame region was obtained, and the transitions of turbulent flame structures were discussed.
近畿大学工業高等専門学校の論文
1990-03-20