Spouting of Vertical Submerged Axisymmetric Jets in Relatively Narrow Channels


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Abstract

The spouting of vertical submerged axisymmetric jets from under the free surface in relatively narrow channels is experimentally and numerically studied. The existence of self-oscillation regimes with transverse displacements of the free-surface elevation is found for wide ranges of constitutive parameters. Dependencies of the self-oscillation period on the velocities of jets and the initial value of the jet submergence are analyzed for various jet diameters. Some spouting regimes are numerically analyzed. A new class of self-oscillation spouting regimes known also as quasiregular is discovered for high-speed small-diameter jets when the depth of their submergence is relatively small. A comparison is made with the results obtained for plane submerged jets.

About the authors

V. P. Karlikov

Moscow State University, Faculty of Mechanics and Mathematics

Author for correspondence.
Email: karlikov@mech.math.msu.su
Russian Federation, Leninskie Gory, Moscow, 119899

A. T. Nechaev

Moscow State University, Faculty of Mechanics and Mathematics

Author for correspondence.
Email: artm26@mail.ru
Russian Federation, Leninskie Gory, Moscow, 119899

S. L. Tolokonnikov

Moscow State University, Faculty of Mechanics and Mathematics

Author for correspondence.
Email: tolsl@mech.math.msu.su
Russian Federation, Leninskie Gory, Moscow, 119899

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