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http://dx.doi.org/10.3744/SNAK.2016.53.4.315

6DOF Simulation and Determination of Hydrodynamic Derivatives of Underwater Tow-Fish Using CFD  

Go, Gwangsoo (School of Naval Architecture and Ocean Engineering, University of Ulsan)
Lee, Euntaek (School of Naval Architecture and Ocean Engineering, University of Ulsan)
Ahn, Hyung Taek (School of Naval Architecture and Ocean Engineering, University of Ulsan)
Kim, Seongil (Agency for Defense Development, SONAR System)
Chun, Seung Yong (Agency for Defense Development, SONAR System)
Kim, Jung Suk (Hanwha Corporation)
Lee, Byeong Hee (Hanwha Corporation)
Publication Information
Journal of the Society of Naval Architects of Korea / v.53, no.4, 2016 , pp. 315-328 More about this Journal
Abstract
Techniques for determinating hydrodynamic derivatives of underwater tow-fish using CFD(Computational Fluid Dynamics) are described in this paper. Main components of hydrodynamic derivatives are added mass, linear damping and non-linear damping coefficients. In this study, linear and non-linear damping coefficients for translational velocities are settled by CFD analysis. In order to analyze the underwater tow-fish, UlsanFOAM based on open-source CFD code, namely OpenFOAM, is employed. By simulating pitch and yaw angle variation of underwater tow-fish, 6DOF(Degree-of-Freedom) forces and moments are estimated at each attitudes. In order to determinate the hydrodynamic derivatives, curves(forces and moments vs attitude) for CFD results are fitted by least square methods. To demonstrate the applicability of the current approach, two different problems(impulsive side towing and straight towing) are simulated and all results are validated.
Keywords
Underwater tow-fish; Hydrodynamic derivatives; Computational Fluid Dynamics(CFD);
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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