Turbulent Boundary Layer on a Rotating Disk in Infinite Quiescent Fluid

概要

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An experimental study of the turbulent flow due to a rotating disk in an infinite quiescent fluid was conducted. Using a single normal- and an inclined-type hot wire, the mean velocity distributions and all six components of Reynolds stress were obtained for various local Reynolds numbers Re_L(=γ^2ω/ν). A log-law region, where the circumferential velocity profile shows a linear variation in a semilogarithmic plot, was observed at Re_L≧4×10^5. The profile in the log-law region at Re_L=1.0×10^6 was in close agreement with that for the flat-plate boundary layer. All components of the turbulence intensity, normalized by the friction velocity, were found to be considerably smaller than those for the flat-plate boundary layer, except very near the wall. The values of the structure parameter a_1 are smaller than those for the flat-plate boundary layer.
一般社団法人日本機械学会の論文
1994-08-15