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Numerical investigation of throttle flow under cavitating conditions
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
2015 (English)In: International Journal of Multiphase Flow, ISSN 0301-9322, Vol. 75, 124-136 p.Article in journal (Refereed) Published
Abstract [en]

The present paper shows the importance of the resolution of large unsteady flow structures in numerical simulations of cavitating flows. Three-dimensional simulations of the flow through a throttle geometry representative for fuel injectors have been performed to characterise the inception and development of cavitation, adopting the implicit Large Eddy Simulation approach. The two-phase flow has been handled by the Volume of Fluid method; whilst the simplified Rayleigh equation has been adopted to handle bubble dynamics. The mathematical model has been solved in the open source C++ toolbox OpenFOAM 2.0.1. Results obtained with the mathematical model are compared with those from RANS-based simulations and validated against experimental measurements. The performed Large Eddy Simulations not only are able to reproduce vortex cavitation, but also give further insight into the complex interaction between cavitation and turbulence through the assessment of the different terms of the vorticity equation.

Place, publisher, year, edition, pages
Oxford, 2015. Vol. 75, 124-136 p.
Keyword [en]
Cavitation, Large eddy simulation, Multiphase flow, Volume of fluid
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-170190DOI: 10.1016/j.ijmultiphaseflow.2015.05.006ISI: 000359957800010ScopusID: 2-s2.0-84930651478OAI: diva2:828245

QC 20150630

QC 20150914

Available from: 2015-06-30 Created: 2015-06-29 Last updated: 2015-09-14Bibliographically approved

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Fuchs, Laszlo
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MechanicsLinné Flow Center, FLOW
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