Low-Speed Three-Dimensional Turbulent Boundary-Layer Data Parts 1 and 2
Abstract
A comprehensive low-speed experiment on a three-dimensional turbulent boundary layer is presented and the results are given in detail. The two parts of the experiment are described in separate parts of the Report and are concerned with different regions of the flow in the vicinity of the up-stream portion of an obstruction placed in a thick two-dimensional boundary layer. The free-stream velocity is 200 ft/s and a typical Reynolds number based upon the boundary layer momentum thickness and local free-stream velocity is 50,000. Velocity profiles obtained up-stream of the free-stream inflexion are well represented by Johnston's triangular model. Polar profiles further down-stream, become more curved and are not well represented by a triangle, though the change from an inner region to an outer region is clear. The extension of the law of wall to three dimensions is discussed and a method of deducing the skin friction is shown to be applicable to the data. Mager's cross-flow profile and simple extensions to three dimensions of existing methods of representing two-dimensional profiles, using Cole's wake function and Thompson's weighting function, are all shown not to fit the data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1971
- Accession Number
- ADB027591
Entities
People
- L. F. East
- R. P. Hoxey