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Measurement of Cavitation Nuclei Dispersion in Hydrodynamic Facilities
Citation
Allan, ESC and Barbaca, L and Russell, PS and Venning, JA and Pearce, BW and Brandner, PA, Measurement of Cavitation Nuclei Dispersion in Hydrodynamic Facilities, Proceedings of the 23rd Australasian Fluid Mechanics Conference, 04-08 December 2022, Sydney, pp. AFMC2022-274. ISSN 2653-0597 (2022) [Refereed Conference Paper]
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Official URL: http://www.afms.org.au/proceedings/23.html
Abstract
Cavitation nuclei populations are characterized by a stochastic distribution, both in size and dispersion within the flow domain. In order to statistically characterize the nuclei spatial
distribution, a volumetric measurement technique based on use of Mie-Scattering Imaging (MSI) has
been developed. Spatial characterization of nuclei concentration is achieved by jointly
traversing a laser beam and a camera across the volume of interest, resulting in a two-dimensional
matrix of line measurements, which are used to plot planar contours. A sample measurement of a
nuclei plume is presented for a high Reynolds number flow over a backward facing step. The flow was
seeded with a relatively large, nominally mono-disperse, nuclei population injected at a point on
the step model surface. Con- tour plots of nuclei concentration in the wake of the step are
presented for three streamwise and five spanwise planes. For each measurement position images were
acquired until a statistically significant number of nuclei were detected (minimum of 500 bubble
detections) or until 200,000 images were acquired. With such limit, the minimum resolvable nuclei
concentration was of the order of
≈ 0.01mL−¹. The developed technique enabled successful characterization of an injected nuclei plume
and provides another tool for rigorous modelling of nucleation in hydrodynamic facilities.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | Mie-Scattering Imaging (MSI), nuclei, cavitation inception |
| 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: | Allan, ESC (Mrs Elizabeth Russell) |
| UTAS Author: | Barbaca, L (Dr Luka Barbaca) |
| UTAS Author: | Russell, PS (Mr Patrick Russell) |
| UTAS Author: | Venning, JA (Dr James Venning) |
| UTAS Author: | Pearce, BW (Dr Bryce Pearce) |
| UTAS Author: | Brandner, PA (Professor Paul Brandner) |
| ID Code: | 154808 |
| Year Published: | 2022 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2023-01-09 |
| Last Modified: | 2023-02-09 |
| Downloads: | 0 |
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