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Microbubble disperse flow about a lifting surface
Citation
Russell, PS and Venning, JA and Brandner, PA and Pearce, BW and Giosio, DR and Ceccio, SL, Microbubble disperse flow about a lifting surface, Proceedings of the 32nd Symposium on Naval Hydrodynamics, 5-10 August 2018, Hamburg, Germany, pp. 1-13. ISBN 978-3-00-061946-5 (2019) [Refereed Conference Paper]
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Official URL: https://www.tuhh.de/SNH2018/
Abstract
The effect of freestream nuclei content on stable
cavitation about a hydrofoil and subsequent microbubble
production in the wake is investigated experimentally.
Microbubble concentrations are measured upstream and
downstream of the hydrofoil for four upstream nuclei
concentrations and three cavitation numbers. For each
case the number of activated nuclei on the hydrofoil
and the transverse distribution of concentrations in the
wake were measured. Upstream nuclei concentrations
were measured with interferometric Mie imaging in the
size range between 45-250 µm at concentrations up
to 30 cm−3. Wake microbubble concentrations were
measured using shadowgraphy in the size range 5-50 µm
at concentrations up to 600 cm−3. Wake concentration
were found to increase for small changes in low upstream
nuclei concentrations but to then decrease for further
increase in concentrations. Wake concentrations were
found to generally increase with decrease in cavitation
number for a particular upstream nuclei concentration.
The increase in wake bubble concentrations with seeding
increase, at the high cavitation number, is in the smaller
bubble size range whereas the increase at the lower
cavitation numbers occurs over a greater size range.
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | nuclei, attached cavitation, microbubble wake |
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: | Russell, PS (Mr Patrick Russell) |
UTAS Author: | Venning, JA (Dr James Venning) |
UTAS Author: | Brandner, PA (Professor Paul Brandner) |
UTAS Author: | Pearce, BW (Dr Bryce Pearce) |
UTAS Author: | Giosio, DR (Dr Dean Giosio) |
ID Code: | 136215 |
Year Published: | 2019 |
Deposited By: | NC Maritime Engineering and Hydrodynamics |
Deposited On: | 2019-12-06 |
Last Modified: | 2020-03-17 |
Downloads: | 14 View Download Statistics |
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