Accession Number : AD0745763

Title :   Flow of Dilute-Polymer (Polyox WSR-301) Solutions About Circular Cylinders.

Descriptive Note : Final rept.,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Sarpkaya,Turgut ; Rainey,Peter G. ; Kell,Richard E.

Report Date : 24 JUL 1972

Pagination or Media Count : 82

Abstract : Flow of the aqueous solutions of Polyox WSR-301, with concentrations of 1 ppm to 100 ppm, and of the pure-solvent (tap-and distilled water) about circular cylinders of diameters 0.5 in. to 1.97 in. was investigated. Direct and pressure integrated drag coefficients, pressure distribution, frequency spectrum, turbulence distribution, etc. were determined for flows of solutions at all levels of degradation and compared with the reference measurements made in pure-solvent flows. During the course of the investigation, a critically degraded solution was observed to cause, at a particular Re, an unforseen instability in the boundary layer and in all the other flow characteristics. This instability which most easily manifested itself in the form of an abrupt drag-force jump from a high subcritical value to a low supercritical vlaue, became the central issue in the investigation. (Author)

Descriptors :   (*POLYMERS, FLUID DYNAMICS), (*HYDROFOILS, DRAG), FRICTION, DRAG, FLOW SEPARATION, VORTICES, TURBULENCE, MODEL TESTS, EXPERIMENTAL DATA

Subject Categories : Physical Chemistry
      Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE