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- W1528759442 abstract "This paper investigates the influence of viscosity and viscoelasticity on the structure of the flow in a l ine vortex in view of understanding their effects on cavitation i nception. Experiments were conducted in a vortex chamber where the fluid injection speed and the liquid properties can be easily controlled. Measurements of the velocities, pressur es, and thus the cavitation number were conducted using a PIV system, pressure gauges, and Pitot tubes. Experiments were performed using water, different dilute concentrations of pol ymer (POLYOX WSR 301) solutions, and solutions with different concentrations of corn syrup for a large range of R eynolds numbers. The measurements and observations showed that cavitation inception at the vortex center was delay ed when polymer and corn syrup solutions are used as compar ed to the experiments in water. However, contrary to reported observations with tip vortices, here the large scal e vortex was found to rotate faster in the polymer and corn syru p solutions. This did not match with our observations of cavitat ion inception delay in the case of polymers and the con ventional thinking about the relationship between pressures a nd velocities in a vortex line. This may be due to the observatio ns that the velocity fluctuations and the turbulent kinetic ene rgy in the viscous core region increased significantly in the polymer and corn syrup solutions and could question the validit y of a pressure computation based on a single vortex." @default.
- W1528759442 created "2016-06-24" @default.
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- W1528759442 date "2009-08-01" @default.
- W1528759442 modified "2023-10-16" @default.
- W1528759442 title "Experimental study of the effects of viscosity and viscoelasticity on a line vortex cavitation" @default.
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