Multi-scale modelling of cavitation-induced pressure around the delft twist 11 hydrofoil
Multi-scale modelling of cavitation-induced pressure around the delft twist 11 hydrofoil
A hybrid Lagrangian-Eulerian cavitation model based on the Schnerr-Sauer mass-transfer formulation is developed and then applied to study the flow around the Delft Twist 11 hydrofoil. The model uses volume-of-fluid approach to resolve large cavities and uses an interface reconstruction algorithm to identify vapour structures smaller than a grid-related threshold. These are then transferred to a Lagrangian framework and convected as particles acting as point noise sources. The underlying volume-of-fluid (VOF) model is shown to be in qualitatively good agreement with the experiment although it is found to under-predict the extent of cavitation. The combined model shows a substantial improvement in the prediction of near-field pressure fluctuations by accounting for the broadband contribution of bubbles smaller than the Eulerian grid size. In the pressure fluctuation spectra this is seen as a plateau extending to over a kilohertz beyond the low-frequency harmonics associated with the shedding frequency.
Lidtke, Artur Konrad
5570c46b-09b5-4345-9f5c-7a5ed2a29ffc
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Humphrey, Victor
23c9bd0c-7870-428f-b0dd-5ff158d22590
Lidtke, Artur Konrad
5570c46b-09b5-4345-9f5c-7a5ed2a29ffc
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Humphrey, Victor
23c9bd0c-7870-428f-b0dd-5ff158d22590
Lidtke, Artur Konrad, Turnock, Stephen and Humphrey, Victor
(2016)
Multi-scale modelling of cavitation-induced pressure around the delft twist 11 hydrofoil.
31st Symposium on Naval Hydrodynamics, Monterey, United States.
11 - 16 Sep 2016.
17 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
A hybrid Lagrangian-Eulerian cavitation model based on the Schnerr-Sauer mass-transfer formulation is developed and then applied to study the flow around the Delft Twist 11 hydrofoil. The model uses volume-of-fluid approach to resolve large cavities and uses an interface reconstruction algorithm to identify vapour structures smaller than a grid-related threshold. These are then transferred to a Lagrangian framework and convected as particles acting as point noise sources. The underlying volume-of-fluid (VOF) model is shown to be in qualitatively good agreement with the experiment although it is found to under-predict the extent of cavitation. The combined model shows a substantial improvement in the prediction of near-field pressure fluctuations by accounting for the broadband contribution of bubbles smaller than the Eulerian grid size. In the pressure fluctuation spectra this is seen as a plateau extending to over a kilohertz beyond the low-frequency harmonics associated with the shedding frequency.
Text
2016 Lidtke A K - Multi-Scale Modelling of Cavitation-Induced Pressure Around the Delft Twist 11 Hydrofoil.pdf
- Accepted Manuscript
More information
Accepted/In Press date: January 2016
e-pub ahead of print date: 13 September 2016
Venue - Dates:
31st Symposium on Naval Hydrodynamics, Monterey, United States, 2016-09-11 - 2016-09-16
Organisations:
Fluid Structure Interactions Group, Faculty of Engineering and the Environment
Identifiers
Local EPrints ID: 401528
URI: http://eprints.soton.ac.uk/id/eprint/401528
PURE UUID: 6c8d9419-1b37-4cb1-88b4-54b03d421d7b
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Date deposited: 18 Oct 2016 10:58
Last modified: 16 Mar 2024 02:37
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