Investigation of tunnel thruster performance and flow by quasi-steady and unsteady RANS simulations
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/332473
Tipus de documentText en actes de congrés
Data publicació2015
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Two numerical models based on the solution of the RANS equations using the SST
k-ω turbulence model have been employed to investigate the hydrodynamic performance and flow of
tunnel thrusters. The flow passages between adjacent blades are discretized with
prismatic cells so that the boundary layer flow is resolved down to the viscous sub-layer. For
three impellers covering a range of extended area ratio and pitch ratio the
hydrodynamic performances predicted by the quasi-steady model agree well with experimental
data. Unsteady simulations are also performed by using the sliding mesh model, and the results are
compared with those of the quasi-steady model to investigate the influences
of the quasi-steady approximation on predicted loads. Through analysis of the flow field, the
reason why the hub of impeller contributes a small amount of thrust, and how the impeller induces
an axial force on the hull, which can amount to 40~60% of the impeller thrust, are made clear.
Besides, several flow features of interest are investigated based on the simulation results.
CitacióYu, C.; Yang, C.-J. Investigation of tunnel thruster performance and flow by quasi-steady and unsteady RANS simulations. A: MARINE VI. "MARINE VI : proceedings of the VI International Conference on Computational Methods in Marine Engineering". CIMNE, 2015, p. 694-708. ISBN 978-84-943928-6-3.
ISBN978-84-943928-6-3
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Marine-2015-57_ ... ion of Tunnel Thruster.pdf | 920,2Kb | Visualitza/Obre |