乱流浮上がり拡散火炎の基部構造に関する実験的検討 : 第1報,レイリー散乱法による温度場の測定(熱工学,内燃機関,動力など)

概要

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In order to clarify flame base structure of turbulent lifted diffusion flame, two flames (Re=4 200 and 6 700) have been experimentally investigated in the configuration of a coflow nozzle. Fuel is methane/hydrogen mixture. These flames were visualized by the schlieren method and OH radical luminescence was also captured by an ICCD camera to characterize the flame bases. Quantitative argumentation of the flame bases has been done on the temperature fields measured by the Rayleigh scattering method; especially, on the temperature dissipation rate and the scalar dissipation rate. Flame bases of turbulent lifted diffusion flames are exposed to small-scale turbulence and emit the light from OH radicals strongly. Both of the vortex-flame interaction and the partial premixing are possibly related to the phenomenon. On the other hand, the scalar structure of the flame base seems to be close to the conventional flamelet structure to show lognormal probability density distributions of the scalar dissipation rate.
一般社団法人日本機械学会の論文
2002-04-25