0807 二次元ウェーブレット変換を用いた後流乱流構造の解析(OS8-2 ウェーブレットの応用,オーガナイズドセッション)

概要

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The multi-scale structures of turbulent wakes generated by three kinds of body (circular cylinder, square cylinder and compound of cylinder and square cylinders) have been experimentally investigated in this study. Firstly, the instantaneous velocity fields and vorticity were measured by PIV technique in a circulating water channel. Then a two-dimensional wavelet multi-resolution technique was used to analyze the instantaneous vorticity measured by PIV, and turbulence structures were decomposed into a number of subsets based on their central frequencies, which are linked with the turbulence scales. Vorticity of various frequencies were examined and compared between the three generators.
一般社団法人日本機械学会の論文
2010-10-29