平板乱流境界層内のスパン方向渦熱拡散係数に及ぼす主流部乱れの影響

書誌事項

タイトル別名
  • The Effect of Free-Stream Turbulence on Spanwise Eddy Diffusivity of Heat in a Flat-Plate Turbulent Boundary Layer.
  • ヘイバン ランリュウ キョウカイソウナイ ノ スパン ホウコウ ウズ ネツ カ

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抄録

Spanwise eddy diffusivity of heat was measured in a flat-plate turbulent boundary layer with a constant spanwise temperature gradient and different intensities of free-stream turbulence. Comparison was made with the usual kinematic eddy viscosity measured in parallel. According to the experimental results, the ratio of these eddy diffusivities is strongly influenced by the free-stream turbulence. However, in the vicinity of the wall, this ratio approaches a certain universal distribution which is independent of the intensity of free-stream turbulence.

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