Numerical investigation of the effects of hydrofoil vibrations on the unsteady behavior of cavitation
10.1088/1755-1315/774/1/012078
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/353425
Tipus de documentText en actes de congrés
Data publicació2021
EditorInstitute of Physics (IOP)
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
In order to better understand the fluid-structure interaction (FSI) in hydraulic machines, this study aims to numerically investigate the flow around an oscillating hydrofoil with special attention on the effect of unsteadiness on leading edge cavitation. The cavitating flow has been modelled as incompressible with a Shear Stress Transport (SST) turbulence model coupled with a transition model, and with a mass transport equation between vapor and water. The sinusoidal motion of the hydrofoil has been implemented by using a moving mesh technique. The numerical results, which have been validated with experimental data, show that a critical frequency exists showing two different behaviors. For pitching frequencies above this critical frequency, the cavitation shedding frequency is linearly dependent on the pitching frequency. Moreover, this change of cavitation dynamics is explained by a pressure phase shift and an amplitude change observed as the pitching frequency increases.
CitacióGeng, L. [et al.]. Numerical investigation of the effects of hydrofoil vibrations on the unsteady behavior of cavitation. A: IAHR Symposium on Hydraulic Machinery and Systems. "30th IAHR Symposium on Hydraulic Machinery and Systems (IAHR 2020) 21-26 March 2021, Lausanne, Switzerland". Londres: Institute of Physics (IOP), 2021, p. 012078:1-012078:7. ISBN 1755-1315. DOI 10.1088/1755-1315/774/1/012078.
ISBN1755-1315
Versió de l'editorhttps://iopscience.iop.org/article/10.1088/1755-1315/774/1/012078
Col·leccions
- Departament de Mecànica de Fluids - Ponències/Comunicacions de congressos [195]
- FLUIDS - Enginyeria de Fluids - Ponències/Comunicacions de congressos [46]
- IFLUIDS - Grup de Recerca Barcelona Fluids & Energy Lab - Ponències/Comunicacions de congressos [10]
- Doctorat en Enginyeria Mecànica, Fluids i Aeronàutica - Ponències/Comunicacions de congressos [54]
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