Interaction of a turbulent spot with a turbulent boundary layer
A rake of hot wire anemometers and a more powerful digital minicomputer were used to determine further details of the structure of a turbulent “spot” in a turbulent boundary layer. Attempts to correct for spanwise buffeting of the spot by the ambient turbulence were inconclusive. Detailed comparisons were made of the character of the educed structure under different alignment criteria.
The educed spanwise extent is narrow in the velocity excess region, and surprisingly broad in the velocity defect region. This latter effect is greatly influenced by the similarity of the educed structure to natural structures in the boundary layer.
KeywordsTurbulent Boundary Layer Turbulent Spot Educe Structure Calculation Proceeds Velocity History
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- 1.Zilberman, M., Wygnanski, I., and Kaplan, R. E., Transitional Boundary Layer Spot in a Fully Turbulent Environment. IUTAM Symposium on Structure of Turbulence and Drag Reduction, Wash., D. C., June 7–12, 1976. In press as a special issue of Phys. of F1.Google Scholar
- 2.Kaplan, R. E. and Laufer, J., “The Intermittently Turbulent Region of the Boundary Layer”, Proc. 12th Inter. Cong. of Applied Mech., Springer 1969.Google Scholar