A numerical study on the shedding frequency of sheet cavitation
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/332047
Tipus de documentText en actes de congrés
Data publicació2017
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
The last decades there is a strong interest in predicting cavitation dynamics as it is a
prerequisite in order to predict cavitation erosion. Industrial applications require
accurate results in an acceptable time span and as a result there is a focus on large scale
dynamics. In this paper the RANS equations are used to investigate the shedding frequency of sheet
cavities in two-dimensional simulations. First a verification study is made for the NACA 0015 in 6
degrees angle of incidence. A grid sensitivity study is conducted in wetted flow and in steady
(non-shedding) cavitating condition (σ=1.6). Then an investigation is conducted in order to
capture the shedding frequency. The results show that only when a correction for turbulent
viscosity at the cavity-water interface is used it was possible to capture the shedding frequency
as found in other numerical studies. Furthermore, a validation study is conducted on a
NACA66-312 α=0.8 for two different angles of attack. The obtained results are compared and
validated with the experimental data from Leroux et al. They indicate that the 2D shedding
frequency predicted by the numerical simulations is in good agreement with the frequency
obtained in the experiment.
CitacióMelissaris, T.; Bulten, N.; Van Terwisga, T. A numerical study on the shedding frequency of sheet cavitation. A: MARINE VII. "MARINE VII : proceedings of the VII International Conference on Computational Methods in Marine Engineering". CIMNE, 2017, p. 801-812. ISBN 978-84-946909-8-3.
ISBN978-84-946909-8-3
Fitxers | Descripció | Mida | Format | Visualitza |
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Marine-2017-65_ ... STUDY ON THE SHEDDING.pdf | 1,768Mb | Visualitza/Obre |