Numerical prediction of erosive collapse events in unsteady compressible cavitating flows
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/333268
Tipus de documentText en actes de congrés
Data publicació2011
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
The objective of the present investigation is the numerical prediction of the
potential of a flow to inflict surface damage by cavitation. For this purpose, physical criteria
are derived that detect and quantify relevant flow phenomena. In particular, we present a
numerical approach for tracing isolated collapses of vapor clouds during the numerical
simulation of the flow. The suggested “collapse detector” provides the frequency of collapses,
their positions and resulting maximum pressures as well as the maximum condensation rate
of each event. These data, together with the maximum wall pressure, allow for an automatic
indication of erosion-sensitive areas.
The employed flow solver CATUM (CAvitation Technische Universität München) is a
density-based 3-D finite volume method equipped with a Low-Mach-number consistent flux
function. All fluid components (liquid, vapor, saturated mixture) are modeled by closed form
equations of state.
To assess the novel approach we simulate an experimentally investigated nozzle-target
flow. A comparison of numerically predicted collapse events with the experimentally observed
areas of cavitation erosion substantiates the proposed methodology. The obtained data
represent a time-history of collapse events together with their position and strength and may
be used to estimate erosion rates.
CitacióMihatsch, M.S. [et al.]. Numerical prediction of erosive collapse events in unsteady compressible cavitating flows. A: . CIMNE, 2011, p. 499-510.
Fitxers | Descripció | Mida | Format | Visualitza |
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Marine-2011-39_NUMERICAL PREDICTION OF EROSIVE.pdf | 863,1Kb | Visualitza/Obre |