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    Experimental investigation of a round jet impacting a disk engraved with radial grooves

    Year: 2018

    Journal: Eur. J. Mech. B-Fluids, Volume 72, NOV-DEC, page 302–310

    Authors: Salah, Sofiene Ouled Taleb; Duchesne, Alexis; De Cock, Nicolas; Massinon, Mathieu; Sassi, Khaled; Abrougui, Khaoula; Lebeau, Frederic; Dorbolo, Stephane

    Organizations: University of Liege-Gembloux Agro-Bio Tech; TERRA - AgriculturelsLife's platform; FNRS

    Keywords: Groove; Phase diagram; Turbulent liquid sheets; Turbulent atomization of liquid sheets; Jet numbers; Droplet diameters; Droplet velocities

    The present work proposes to investigate the impact of a turbulent round jet on a disk. The disk diameter is one order of magnitude larger than the jet diameter but small enough to avoid the formation of a circular hydraulic jump. The case of a smooth disk is first studied as the reference case. We then report results obtained with a disk engraved along its circumference by a number N of radial grooves. The grooves are used to split the liquid sheet into multiple jets. According to the incoming flow rate Q and to the geometry of the groove, the number of jets n can be stable and corresponds to 2N jets and N jets, or variable, i.e. merged jets (mixed zone). Phase diagrams (Q, n) are deduced from measurements for different lengths of the groove. Finally, the obtained droplets are characterized in terms of diameters and velocities. (C) 2018 Elsevier Masson SAS. All rights reserved.
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