Article
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Experimental Study of Cavitation Control Around a Circular Cylinder Using a Passive Control Method
Version 1
: Received: 9 January 2024 / Approved: 10 January 2024 / Online: 10 January 2024 (08:22:04 CET)
A peer-reviewed article of this Preprint also exists.
Kadivar, E.; Dawoodian, M.; Lin, Y.; el Moctar, O. Experiments on Cavitation Control around a Cylinder Using Biomimetic Riblets. J. Mar. Sci. Eng. 2024, 12, 293. Kadivar, E.; Dawoodian, M.; Lin, Y.; el Moctar, O. Experiments on Cavitation Control around a Cylinder Using Biomimetic Riblets. J. Mar. Sci. Eng. 2024, 12, 293.
Abstract
Experimental investigations were conducted to uncover the impact of cavitation control - through the use of riblets (mesoscale surface structuring) - on cavitating flows around a circular cylinder. First, the dynamics of cavitation in the flow behind a finite cylinder (without riblets) was unveiled by visualizing the cavitation clouds and measuring the lift force fluctuations acting on the cylinder. Second, as a significant step forward, a comprehensive explanation was provided for the mechanism of cavitation control using two bio-inspired riblet morphologies positioned in different orientations and locations on the cylinder. For the first time, the effects of these tiny structures on the flow dynamics and the associated cavitation process were scrutinized. This showed that scalloped riblets, with their curved design, induced secondary vortices near their tips and distorted primary streamwise vortices, and that high velocity gradients near the jagged pattern peaks of sawtooth riblets delayed flow separation, which affected cavitation.
Keywords
Hydrodynamic cavitation; cavitation control; high speed observation; mesoscale surface structuring; circular cylinder
Subject
Engineering, Marine Engineering
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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