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http://dx.doi.org/10.26748/KSOE.2018.2.32.1.036

Numerical Analysis of Unsteady Cavitating Vortex around Two-dimensional Wedge-shaped Submerged Body  

Kim, Ji-Hye (Naval Architecture and Ocean Engineering, Chungnam National University)
Jeong, So-Won (Naval Architecture and Ocean Engineering, Chungnam National University)
Ahn, Byoung-Kwon (Naval Architecture and Ocean Engineering, Chungnam National University)
Park, Chul-Soo (Korea Research Institute of Ships and Ocean Engineering)
Kim, Gun-Do (Korea Research Institute of Ships and Ocean Engineering)
Publication Information
Journal of Ocean Engineering and Technology / v.32, no.1, 2018 , pp. 36-42 More about this Journal
Abstract
Unlike a slender body, vortices are shed off alternately in the wake of a blunt body. In the case of liquid flows, when the pressure falls below the vapor pressure, cavitation occurs in the vortex core and affects the formation of the vortex street. This phenomenon is of major importance in many practical cases because the alternate shedding of vortices creates imbalanced forces on the body. Hence, it is very important to determine the shedding frequency of cavitating vortices. In this paper, the unsteady cavitating flow around a two-dimensional wedge-shaped submerged body was simulated using the commercial code STAR-CCM+. A numerical investigation of the structure of cavitating vortices was performed for a model with an apex angle of $20^{\circ}C$. The results were validated by comparing them with experimental measurements carried out at a cavitation tunnel of Chungnam National University (CNU-CT). It was found that the shedding frequency of the vortex increased by up to 18%, which was strongly affected by the development of cavitation.
Keywords
Cavitating flow; Multiphase flow; Wake flow; Vortex;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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