流路中の三角平板による渦発生と混合促進 : 熱工学, 内燃機関, 動力など

概要

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The effect of triangular plates in a mixing channel on fuel-air mixing was investigated to design a compact gas-turbine combustor. Turbulent flow was visualized by laser-light sheet method and velocity distributions were measured by cross-correlation particle image velocimetry. Also, fuel distributions were measured by Rayleigh scattering method. The obtained results show that triangular plates produce a large-scale fluid motion perpendicular to the mean streamline together with small eddies. They might stir the bulk flow and promote the turbulent mixing downstream, thus resulting in a more homogeneous mixture, whereas in the case without triangular plates fuel distributes heterogeneously and the variance of mixture concentration is high even in the flow downstream.
社団法人日本機械学会の論文
2001-01-25