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Global mode visualisation in cavitating flows
Citation
Venning, JA and Giosio, DR and Pearce, BW and Brandner, PA, Global mode visualisation in cavitating flows, Proceedings of the 10th Symposium on Cavitation (CAV2018), 14-16 May 2018, Baltimore, Maryland, USA, pp. 485-490. ISBN 9780791861851 (2018) [Refereed Conference Paper]
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Copyright Statement
Copyright 2018 ASME
Official URL: http://ebooks.asmedigitalcollection.asme.org/conte...
DOI: doi:10.1115/1.861851_ch92
Abstract
A technique for visualising global frequency modes and phasing information is presented using fast Fourier transforms applied to individual pixel intensities of high-speed photography image frames. A singular value decomposition is applied to the resulting complex data set to allow the application of windowing to the transforms. A high-speed image set of cloud cavitation about a sphere is used to demonstrate the technique and identify the dominant cavitation shedding modes. Three frequencies were found and the modal analysis show these to correspond to large-scale near symmetric shedding, intermediate-scale oblique shedding, and smallscale near symmetric shedding, respectively. Results obtained by the presented image analysis technique show close agreement to shedding frequencies obtained from pressure data.
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | cloud cavitation, frequency analysis, modal decomposition |
Research Division: | Engineering |
Research Group: | Maritime engineering |
Research Field: | Ship and platform structures (incl. maritime hydrodynamics) |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in engineering |
UTAS Author: | Venning, JA (Dr James Venning) |
UTAS Author: | Giosio, DR (Dr Dean Giosio) |
UTAS Author: | Pearce, BW (Dr Bryce Pearce) |
UTAS Author: | Brandner, PA (Professor Paul Brandner) |
ID Code: | 131934 |
Year Published: | 2018 |
Deposited By: | NC Maritime Engineering and Hydrodynamics |
Deposited On: | 2019-04-12 |
Last Modified: | 2019-06-19 |
Downloads: | 0 |
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