ハイブリッドPDF法による乱流噴流拡散火炎の数値シミュレーション : 熱工学, 内燃機関, 動力など

概要

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A hybrid probability density function (PDF) method has been developed so as to analyze turbulent diffusion flames, devoting to only PDF's of the mixture fraction, based on the conserved scalar approach. To evaluate the potentiality of the method, a turbulent jet diffusion flame has been calculated by this method and also the presumed PDF method called the flamelet model to compare those results with experimental results. The hybrid PDF method is able to evaluate the process of inhomogeneous turbulent mixing, while the flamelet model overestimates the scalar turbulent mixing, as the presumed PDF assumption ignoring the inhomogeneous mixing. The accuracy of the estimation of the flow field is crucial for the hybrid PDF method, whereas the underestimation of the turbulent kinetic energy by the k-ε 2 equation model used in the present study leads to the underestimation of the scalar turbulent mixing.
一般社団法人日本機械学会の論文
2001-01-25