広がり流路内の火炎の安定性および保炎 : 平面せん断流中の拡散火炎の構造と挙動

概要

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The structure and characteristics of plane diffusion flames in a divergent shear flow were experimentally investigated for elucidating the effects of flow divergence on overall flame properties, flame stability, and organized flame structure. Cold divergent shear flow was also studied to surmise a qualitative picture of flame-flow interaction. Measurements of cold flow velocity and turbulence intensity, visual and optical observations, and film motion analyses of high-speed shadow movies were made for obtaining not only overall behavior, but also the statistical character of the organized eddy and organized eddy flame. It was found that a simple slip-flow model, which is incompressible and inviscid, can qualitatively describe the pressure distributions of the cold divergent shear fiow. According to the experimental results, the flow divergence was found to increase the dimensions of the organized eddy, to enlarge the blue-colored flame region where organized eddies play an important role in the transport process, and therefore to enhance combustion.
一般社団法人日本機械学会の論文
1991-06-25