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http://dx.doi.org/10.3744/SNAK.2006.43.2.177

Numerical Analysis of Tip Vortex Cavitation Behavior and Noise on Hydrofoil using Dissipation Vortex Model and Bubble Theory  

Park, Kwang-Kun (School of Mechanical and Aerospace Engineering, Seoul National University)
Seol, Han-Shin (Maritime and Ocean Engineering Research Institute (MOERI), KORDI)
Lee, Soo-Gab (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.43, no.2, 2006 , pp. 177-185 More about this Journal
Abstract
Cavitation is the dominant noise source of the marine vehicle. Of the various types of cavitation , tip vortex cavitation is the first appearance type of marine propeller cavitation and it generates high frequency noise. In this study, tip vortex cavitation behavior and noise are numerically investigated. A numerical scheme using Eulerian flow field computation and Lagrangian particle trace approach is applied to simulate the tip vortex cavitation on the hydrofoil. Vortex flow field is simulated by combined Moore and Saffman's vortex core radius equation and Sculley vortex model. Tip vortex cavitation behavior is analyzed by coupled Rayleigh-Plesset equation and trajectory equation. The cavitation nuclei are distributed and released in the vortex flow result. Vortex cavitation trajectories and radius variations are computed according to nuclei initial size. Noise is analyzed using time dependent cavitation bubble position and radius data. This study may lay the foundation for future work on vortex cavitation study and it will provide a basis for proper underwater propeller noise control strategies.
Keywords
Tip vortex cavitation; Vortex modeling; Rayleigh-plesset equation;
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