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Nucleation effects on hydrofoil tip vortex cavitation
Citation
Khoo, MT and Venning, JA and Pearce, BW and Brandner, PA, Nucleation effects on hydrofoil tip vortex cavitation, Proceedings of the 21st Australasian Fluid Mechanics Conference 2018, 10-13 December 2018, Adelaide, Australia, pp. 1-4. ISBN 978-0-646-59784-3 (2018) [Refereed Conference Paper]
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Official URL: https://people.eng.unimelb.edu.au/imarusic/proceed...
Abstract
Tip vortex cavitation inception about an elliptical planform,
NACA 0012 hydrofoil is investigated in cavitation tunnel flows
in which cavitation nuclei are deplete and abundant. Tests were
conducted at fixed Reynolds and cavitation numbers. The onset, or inception, of cavitation was induced by increasing the
angle of incidence and behaviour was recorded photographically and acoustically. Cavitation inception occurred at a higher
incidence in the deplete case compared with the abundant due
to fewer weaker nuclei. It also occurred within a small incidence change for the deplete case, with the appearance of a
continuous, cavitating vortical flow structure. Whereas for the
abundant case, inception was intermittent, occurring across a
larger incidence range. This was associated with individual nuclei activation events increasing in frequency with increasing
incidence. Sound pressure levels increased with inception and
cavity development but reduced to a local minimum once the
cavity attached to the hydrofoil, increasing thereafter with incidence. Overall sound levels were higher for the abundant case
than for the deplete case.
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | tip vortex cavitation, inception, acoustic characterisation |
Research Division: | Engineering |
Research Group: | Maritime engineering |
Research Field: | Ship and platform structures (incl. maritime hydrodynamics) |
Objective Division: | Defence |
Objective Group: | Defence |
Objective Field: | Maritime |
UTAS Author: | Khoo, MT (Mr Matthew Khoo) |
UTAS Author: | Venning, JA (Dr James Venning) |
UTAS Author: | Pearce, BW (Dr Bryce Pearce) |
UTAS Author: | Brandner, PA (Professor Paul Brandner) |
ID Code: | 136212 |
Year Published: | 2018 |
Deposited By: | NC Maritime Engineering and Hydrodynamics |
Deposited On: | 2019-12-06 |
Last Modified: | 2020-01-30 |
Downloads: | 0 |
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