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선박 프로펠러에 의해 발생하는 수중방사소음에 대한 수치 해석
정재용(Jaeyong Jeong),김인녕(Innyoung Kim),윤대근(Daegeun Yoon),김성훈(Sunghoon Kim),유동현(Donghyun You) 한국전산유체공학회 2021 한국전산유체공학회지 Vol.26 No.1
Numerical simulations of turbulent flow, propeller cavitation, and induced underwater radiated noise over a marine propeller with a realistic ship geometry are conducted. Scaled ship geometries of the KVLCC2 hull and the KP458 propeller are considered in the present simulation. Turbulent flow past a marine propeller is investigated using incompressible large eddy simulation (LES) to accurately capture small scale turbulent fluctuations. In addition, to treat the propeller cavitation and track the cavity interface, a volume of fluid method (VOF) is used with the Schnerr-Sauer cavitation model. By using time series of fluid pressure and velocity field, acoustic pressure at the monitoring point is computed by the Ffowcs-Williams Hawkings (FW-H) acoustic analogy. The predicted acoustic pressure computed by integration on the cylindrical FW-H data surface are well matched with the experimental results measured at KRISO.