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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

TRANSITION OF WAVE PACKETS ORIGINATING FROM LOCALIZED STRONG DISTURBANCES IN LAMINAR BOUNDARY-LAYER OF ROTATING-DISK FLOW

pages 75-80
DOI: 10.1615/TSFP2.860
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ABSTRACT

A laminar to turbulent transition process for a three-dimensional boundary layer in a rotating-disk flow initiated by localized disturbances was experimentally investigated. The hot-wire analysis showed that the point disturbance develops into a turbulent patch. The turbulent patch propagating in the wedge region is accompanied by two families of traveling waves, which consist of the so-called cross-flow and streamline-curvature modes. The configuration in the plane view of the turbulent patch is a crescent, which is different from an arrowhead-shaped turbulent spot in a Blasius boundary layer.

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