Accession Number : AD0705105

Title :   SURFACE WAKE OF A CIRCULAR CYLINDER IN DILUTE AQUEOUS SOLUTIONS OF POLY(ETHYLENE OXIDE).

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Fletcher,Michael Henry

Report Date : JUN 1969

Pagination or Media Count : 59

Abstract : The wake formed by surface-piercing circular cylinders towed through 0, 100, and 200 parts per million (by weight) aqueous solutions of Poly(ethylene oxide), Polyox WSR-301, was examined photographically. Cylinder diameters ranged from 1/4 in. to 2 in.; Froude numbers from 0.6 to 10. Measurements of spray height and ventilation pocket depth were made. No significant alteration of pocket depth with polymer concentration was observed; however, the spray height was reduced by increasing the Polyox concentration. Qualitative differences between the wakes of cylinders in Polyox solutions and those in water were (1) a serrated separation line characterized the ventilation pocket of the polymer solutions as opposed to the straight separation line of water, (2) the striated appearance of the pocket walls in Polyox instead of the clear, smooth walls in water, (3) the coherence displayed by the spray in Polyox instead of the random character of the spray in water, and (4) the larger and more irregularly shaped bubbles in Polyox as opposed to those in water. (Author)

Descriptors :   (*CYLINDRICAL BODIES, *SKIN FRICTION), (*DRAG, REDUCTION), (*POLYMERS, *ADDITIVES), SOLUTIONS(MIXTURES), SPRAYS, EPOXY RESINS, WAKE, CONCENTRATION(CHEMISTRY), THESES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE