A numerical study of unsteady cavitation on a hydrofoil by les and URANS method

Conference paper (2015)

Authors

Zi Ru Li Wuhan University of Technology
Guang Ming Zhang Wuhan University of Technology
Wei Dong He Wuhan University of Technology
T.J.C. van Terwisga Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering , Maritime Research Institute Netherlands (MARIN)
Research Group
Ship Hydromechanics and Structures (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2015 Zi Ru Li, Guang Ming Zhang, Wei Dong He, T.J.C. van Terwisga
DOI: https://doi.org/10.1088/1742-6596/656/1/012157
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Published Date

2015

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Ship Hydromechanics and Structures

Abstract

In this paper, the unsteady cavitation phenomena on a NACA0015 hydrofoil is numerically simulated by unsteady Reynolds-Averaged Navier-Stokes (URANS) method and Large Eddy Simulation (LES) in single-fluid approaches to multiphase modelling, respectively. It is observed that the large-scale structures and characteristic periodic shedding predicted by the URANS with the modified SST k-ω turbulence model show a good qualitative match with the experimental observations but with quantitative discrepancies, such as a different cavity length and volume, and a different location of shedding. Compared to the URANS results, the LES results reproduce more details of unsteady dynamics with an improved quantitative agreement.