Accession Number : AD0755215

Title :   The Effects of a Drag Reducing Polymer on the Turbulent Boundary Layer of a Submerged Flat Plate.

Descriptive Note : Technical rept.,

Corporate Author : NOTRE DAME UNIV IND COLL OF ENGINEERING

Personal Author(s) : Kumor,Stanley M. ; Sylvester,Nicholas D.

Report Date : JAN 1973

Pagination or Media Count : 121

Abstract : The primary objective of an experimental investigation was to study the effect that a drag-reducing polymer has on the turbulent boundary layer of a submerged flat plate using a Laser-Doppler flowmeter. Data are presented showing the time effects caused by polymer solution drag-reduction degradation on the mean velocity and axial fluctuating-velocity profiles. The importance of the data is that it provides a connection between the apparently diverse results reported previously for the velocity profiles at conditions of high and low drag-reduction effectiveness. The polymer molecules' effect on the boundary layer structure is apparently progressively restricted to the near wall region with decreasing drag reduction in agreement with the mean velocity profiles. (Author)

Descriptors :   (*TURBULENT BOUNDARY LAYER, *POLYMERS), (*DRAG, REDUCTION), FLAT PLATE MODELS, WATER TUNNELS, MODEL TESTS, MATHEMATICAL MODELS, DEEP SUBMERGENCE, FLOWMETERS, SOLUTIONS(MIXTURES), BOUNDARY LAYER CONTROL, WALLS, VELOCITY

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE