Periodic Behavior and Noise Characteristics of Cavitating Flow around Two-Dimensional Hydrofoils

The occurrence of cavitation in marine propellers is a major source of noise in ships. Consequently, the occurrence and noise characteristics of cavitation must be better understood to control this issue. This study focuses on identifying the occurrence and noise characteristics of cavitating flow a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of marine science and engineering 2024-09, Vol.12 (9), p.1681
Main Authors: Heo, Namug, Kim, Ji-Hye
Format: Article
Language:English
Subjects:
Analysis
Angle of attack
Cavitation
Cavity flow
Computational fluid dynamics
computational fluid dynamics (CFD)
Data analysis
Fluid dynamics
Fluid flow
Frequency analysis
Hydrodynamics
Hydrofoil boats
Hydrofoils
Large eddy simulation
large eddy simulation (LES)
Mathematical models
Methods
Noise
noise characteristics
Noise control
Noise prediction
Numerical analysis
Pressure sensors
Propellers
Reynolds averaged Navier-Stokes method
Reynolds-averaged Navier–Stokes (RANS) equation
Sensors
Simulation
Simulation methods
Turbulence models
Two dimensional analysis
Two dimensional flow
unsteady flow
Viscosity
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The occurrence of cavitation in marine propellers is a major source of noise in ships. Consequently, the occurrence and noise characteristics of cavitation must be better understood to control this issue. This study focuses on identifying the occurrence and noise characteristics of cavitating flow around two-dimensional (2D) hydrofoils. Using the commercial computational fluid dynamics software STAR-CCM+, a numerical analysis was conducted on the partial cavity flow occurring around 2D hydrofoils at specific angles of attack. In addition, the cavitation noise characteristics were analyzed by conducting a frequency analysis using the predicted pressure data obtained via a fluctuating pressure sensor positioned vertically above the hydrofoil. Consequently, the numerical results were compared with existing experimental data to validate the accuracy of the simulation. This study identifies the limitations of the Reynolds-averaged Navier–Stokes (RANS) method by closely comparing it with the large eddy simulation (LES) method for assessing noise characteristics in unsteady cavitating flow. Although RANS has limitations in qualitatively assessing periodic behavior compared to LES, it effectively predicts cavitation extent and is valuable for relative assessments in practical applications.
ISSN:2077-1312
2077-1312
DOI:10.3390/jmse12091681