Circulatory Effects Developed during the Motion of Some Objects in the Marine Medium and the Atmosphere

The expressions for the hydrodynamic load acting in circulatory flow on a dipole located in a stratified (two-layer) fluid current of finite depth are derived. The wave-making drag and the lift force are investigated as functions of the flow velocity and circulation. It is shown that taking the circ...

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Bibliographic Details
Published in:Fluid dynamics 2019-07, Vol.54 (4), p.481-487
Main Authors: Vladimirov, I. Yu, Korchagin, N. N.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Classical Mechanics
Dipoles
Engineering Fluid Dynamics
Flow velocity
Fluid- and Aerodynamics
Marine environment
Object motion
Physics
Physics and Astronomy
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Summary:The expressions for the hydrodynamic load acting in circulatory flow on a dipole located in a stratified (two-layer) fluid current of finite depth are derived. The wave-making drag and the lift force are investigated as functions of the flow velocity and circulation. It is shown that taking the circulation into account can significantly change the hydrodynamic reaction on the dipole. The effect of sharp (reversible) change in the direction of action of the lift force over a relatively narrow velocity range of flow around the pipeline section modeled by the dipole is revealed. The possibility of manifestation of a similar effect during the motion of self-propelled underwater objects and flying vehicles is discussed.
ISSN:0015-4628
1573-8507
DOI:10.1134/S0015462819030066