Accession Number : ADA953319

Title :   Investigation of Drag Reduction Obtained through Boundary Layer Injection of Dilute Solutions of Poly(Ethylene-Oxide),

Corporate Author : NAVAL ACADEMY ANNAPOLIS MD

Personal Author(s) : Doherty, B. J.

Report Date : MAY 1965

Pagination or Media Count : 35

Abstract : The objectives of this investigation were: To determine whether or not a significant reduction in drag could be obtained by the addition of a dilute high molecular weight linear polymer solution to the boundary layer surrounding a test model; To observe by closely controlling the experiment, how the effect of the polymer varied with vehicle velocity, injection rate and solution concentration; To determine how the additive was able to change the drag. The polymer used in this series of tests was Polyox WSR-301, a water soluble Poly-ethelene oxide produced by Union Carbide Corporation. It was chosen because it appeared to promise best results from pipe flow and rotating disk experiments. The dilute polymer solution was ejected from the model into the boundary layer. By varying the velocity, additive concentration and injection rate it was possible to determine how the drag reduction varied with these parameters.

Descriptors :   *DRAG REDUCTION, *UNDERWATER VEHICLES, *BOUNDARY LAYER, *SOLUTIONS(MIXTURES), *POLYMERS, *ETHYLENE OXIDE, DILUTION, MODEL TESTS, VELOCITY, INJECTION, RATES, CONCENTRATION(CHEMISTRY), ADDITIVES, TEST METHODS, PIPES, FLOW, DISKS, ROTATION, LAMINAR FLOW, TURBULENT FLOW.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE