Viscous effects on the hydrodynamic performance of semi-active flapping propulsor
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/330030
Tipus de documentText en actes de congrés
Data publicació2019
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
A numerical tool based on Lattice Boltzmann Method is used to investigate viscous
effects on the hydrodynamic performance of a semi-active flapping propulsor. The
obtained viscous results are compared with potential flow results previously presented in
literature. It is found that both numerical tools give a qualitatively good trend agreement of the
open water performance at high equivalent advance numbers. The results obtained using the viscous
solver are slightly lower than that of potential flow in the region where flow separation is not
observed. However, in case of small equivalent advance numbers, serious flow separation
occurs due to high angle of attack, and hence the viscous results yield significantly lower
efficiency. In spite of the mentioned deviation in the performance predictions, the LBM results
confirm that the semi-active flapping propulsor is efficient over a wide range of operating
conditions. This shows
a possibility to practically use such self-pitching foil as a propulsion system.
CitacióThawewat, N.; Phoemsapthawee, S.; Jungrungruengtaworn, S. Viscous effects on the hydrodynamic performance of semi-active flapping propulsor. A: MARINE VIII. "MARINE VIII : proceedings of the VIII International Conference on Computational Methods in Marine Engineering". CIMNE, 2019, p. 607-614. ISBN 978-84-949194-3-5.
ISBN978-84-949194-3-5
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