论文信息 - STUDY OF VORTICAL SEPARATION FROM AN AXISYMMETRIC HILL

STUDY OF VORTICAL SEPARATION FROM AN AXISYMMETRIC HILL

Surface mean pressures, oil-flow visualizations, and three-velocity-component laser-Doppler velocimeter measurements are presented for a turbulent boundary layer of thickness δ over an axisymmetric hill of height H = 2δ. Complex vortical separations occur on the leeside and merge into two large streamwise mean vortices downstream. At x/H = 3.69, the near-wall flow (y + < 90) is dominated by the wall, while the vortices in the outer region produce large turbulence levels near the centerline and appear to have low frequency motions that contribute to turbulent diffusion

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