Numerical study of cavitating flow in asymmetrical nozzles of injectors/atomizers. application to fully developed cavitation cases II
Fecha
2021-11-01Autor
Coussirat, Miguel
Moll, Flavio
Metadatos
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In the first part of this work a broad discussion related to steady and unsteady state cavitation
cases and the calibration of turbulence models in steady state cases simulations was presented. In this
second part, a numerical analysis of the unsteady flow behavior in nozzles of injectors/atomizers is
presented. Previous works showed that it is possible to capture several of the incipient cavitating flow
characteristics performing a careful calibration of the Eddy Viscosity Models in nozzles. This work
extends the numerical study for these nozzles in cases where the fully developed cavitation state appears.
Again, a careful calibration of the selected Eddy Viscosity Models becomes an important task to obtain
accurate predictions of the flow. The results obtained show that it is possible to capture the main cavity
features and the characteristic frequencies of the flow unsteadiness. The obtained conclusions could be
useful to improve injectors design using numerical modeling, because the detection of the typical
frequencies related to the flow unsteadiness could be useful to detect possible coupling between some of
these frequencies and one of the natural vibration modes of the nozzle leading to a possible undesired
fluid- structure interaction.
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