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Article

Systematic Validation Study of an Unsteady Cavitating Flow over a Hydrofoil Using Conditional Averaging: LES and PIV

1
Institute of Thermophysics SB RAS, Lavrentyev Ave. 1, 630090 Novosibirsk, Russia
2
Novosibirsk State University, Pirogov Str. 2, 630090 Novosibirsk, Russia
3
Imperial College London, South Kensington, London SW7 2AZ, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Alon Gany
J. Mar. Sci. Eng. 2021, 9(11), 1193; https://doi.org/10.3390/jmse9111193
Received: 26 September 2021 / Revised: 14 October 2021 / Accepted: 18 October 2021 / Published: 27 October 2021
(This article belongs to the Section Ocean Engineering)
We present results of Large-eddy simulations (LES) modeling of steady sheet and unsteady cloud cavitation on a two-dimensional hydrofoil which are validated against Particle image velocimetry (PIV) data. The study is performed for the angle of attack of 9° and high Reynolds numbers ReC of the order of 106 providing a strong adverse pressure gradient along the surface. We employ the Schnerr–Sauer and Kunz cavitation models together with the adaptive mesh refinement in critical flow regions where intensive phase transitions occur. Comparison of the LES and visualization results confirms that the flow dynamics is adequately reproduced in the calculations. To correctly match averaged velocity distributions, we propose a new methodology based on conditional averaging of instantaneous velocity fields measured by PIV which only provides information on the liquid phase. This approach leads to an excellent overall agreement between the conditionally averaged fields of the mean velocity and turbulence intensity obtained experimentally and numerically. The benefits of second-order discretization schemes are highlighted as opposed to the lower-order TVD scheme. View Full-Text
Keywords: cavitation; hydrofoil; large-eddy simulations; particle image velocimetry cavitation; hydrofoil; large-eddy simulations; particle image velocimetry
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MDPI and ACS Style

Ivashchenko, E.; Hrebtov, M.; Timoshevskiy, M.; Pervunin, K.; Mullyadzhanov, R. Systematic Validation Study of an Unsteady Cavitating Flow over a Hydrofoil Using Conditional Averaging: LES and PIV. J. Mar. Sci. Eng. 2021, 9, 1193. https://doi.org/10.3390/jmse9111193

AMA Style

Ivashchenko E, Hrebtov M, Timoshevskiy M, Pervunin K, Mullyadzhanov R. Systematic Validation Study of an Unsteady Cavitating Flow over a Hydrofoil Using Conditional Averaging: LES and PIV. Journal of Marine Science and Engineering. 2021; 9(11):1193. https://doi.org/10.3390/jmse9111193

Chicago/Turabian Style

Ivashchenko, Elizaveta, Mikhail Hrebtov, Mikhail Timoshevskiy, Konstantin Pervunin, and Rustam Mullyadzhanov. 2021. "Systematic Validation Study of an Unsteady Cavitating Flow over a Hydrofoil Using Conditional Averaging: LES and PIV" Journal of Marine Science and Engineering 9, no. 11: 1193. https://doi.org/10.3390/jmse9111193

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