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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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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−. 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
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