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Systematic Validation Study of an Unsteady Cavitating Flow over a Hydrofoil Using Conditional Averaging: LES and PIV
- Source :
- Journal of Marine Science and Engineering, Vol 9, Iss 1193, p 1193 (2021), Journal of Marine Science and Engineering, Volume 9, Issue 11
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- 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.
- Subjects :
- DYNAMICS
Technology
hydrofoil
Discretization
SCHEMES
Naval architecture. Shipbuilding. Marine engineering
VM1-989
Ocean Engineering
GC1-1581
Oceanography
Physics::Fluid Dynamics
symbols.namesake
Engineering
large-eddy simulations
cavitation
BUBBLE
particle image velocimetry
Engineering, Ocean
0405 Oceanography
Choked flow
Water Science and Technology
Civil and Structural Engineering
Physics
Science & Technology
LARGE-EDDY SIMULATION
Adaptive mesh refinement
Angle of attack
Reynolds number
Mechanics
Engineering, Marine
Adverse pressure gradient
MODEL
Particle image velocimetry
0911 Maritime Engineering
Turbulence kinetic energy
Physical Sciences
symbols
SHEET
Computer Science::Programming Languages
NUMERICAL-SIMULATION
0704 Fisheries Sciences
Subjects
Details
- Language :
- English
- ISSN :
- 20771312
- Volume :
- 9
- Issue :
- 1193
- Database :
- OpenAIRE
- Journal :
- Journal of Marine Science and Engineering
- Accession number :
- edsair.doi.dedup.....ae03e8c3c2ca4543b2c3faa3597f6f25