軸対称異方性乱流場の実験的解析 : 第6報, 波数空間内におけるエネルギー輸送機構

概要

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A cigar-shaped axisymmetric turbulence field is experimentally investigated. The equivalent integral scale and the scale of the maximum energy-dissipation rate estimated for the axisymmetric turbulence were almost equal to the scales of isotropic turbulence, which shows that they are valid for determining the characteristic wavenumber range in the spectrum of nonisotropic turbulence, such as the range of energy-containing eddies, the inertial subrange and the energy dissipation range. Energy spectra were measured and the energy dissipation spectra and energy transfer spectra were calculated. The aspects of their streamwise evolutions suggest that it is indispensable to recover the isotropy of the large energy-containing eddies before the turbulence energy begins to be steadily supplied into the dissipation range from the inertial subrange.
社団法人日本機械学会の論文
1991-05-25