Propeller tip vortex cavitation mitigation using roughness
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Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/329663
Tipus de documentText en actes de congrés
Data publicació2019
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
This paper presents an investigation of roughness application on marine propellers
in order to alter their tip vortex properties, and consequently mitigate tip vortex
cavitation. SST k − ω model along with a curvature correction is employed to simulate
the flow on an appropriate grid resolution for tip vortex propagation, at least 32 cells per
vortex diameter. The roughness is modelled by using a rough wall function to increase
the turbulent properties in roughed areas. In one case, roughness geometry is included as a
part of the blade geometry, and the flow around them are resolved. To minimize the negative
effects of the roughness on the propeller performance, the roughness area is optimized by
simultaneous consideration of the tip vortex mitigation and performance degradation. For the
considered operating condition, it is found that having roughness on the tip region of suction side
can reduce the cavitation inception
by 18 % while keeping the performance degradation in a reasonable range, less than 2%.
CitacióAsnaghi, A. [et al.]. Propeller tip vortex cavitation mitigation using roughness. A: MARINE VIII. "MARINE VIII : proceedings of the VIII International Conference on Computational Methods in Marine Engineering". CIMNE, 2019, p. 383-392. ISBN 978-84-949194-3-5.
ISBN978-84-949194-3-5
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Marine-2019-31_Propeller tip vortex.pdf | 657,1Kb | Visualitza/Obre |