Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.