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http://dx.doi.org/10.3795/KSME-A.2017.41.2.087

Numerical Study on Cavitation Flow and Noise in the Flow Around a Clark-Y Hydrofoil  

Ku, Garam (School of Mechanical Engineering, Pusan Nat'l Univ.)
Cheong, Cheolung (School of Mechanical Engineering, Pusan Nat'l Univ.)
Kim, Sanghyeon (School of Mechanical Engineering, Pusan Nat'l Univ.)
Ha, Cong-Tu (School of Mechanical Engineering, Pusan Nat'l Univ.)
Park, Warn-Gyu (School of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.41, no.2, 2017 , pp. 87-94 More about this Journal
Abstract
Because the cavitation flow driven by an underwater propeller corrodes the materials around it and generates a high level of noise, it has become an important topic in engineering research. In this study, computational fluid dynamics techniques are applied to simulate cavitation flow, and the noise in the flow is predicted by applying the acoustic analogy to the predicted flow. The predicted results are compared with measurement results and other predictions in terms of surface pressure distribution and the temporal variation in liquid volume fraction. The predicted results are found to be in good agreement with the measured results. The source of the noise attributed to the time rate of change in the liquid volume fraction around the hydrofoil is modeled as a monopole source, and the source of the noise due to unsteady pressure perturbations on the hydrofoil surface is modeled as a dipole source. Then the predicted noise results are analyzed in terms of directivity and SPL spectrum. The noise caused by unsteady pressure perturbations was dominant in the entire frequency range considered in the study.
Keywords
Cavitation; Flow Noise; Homogeneous Mixture; Hydrofoil; Monopole; Dipole;
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Times Cited By KSCI : 1  (Citation Analysis)
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