Large-eddy simulation of cavitating nozzle and jet flows

F. Örley, T. Trummler, S. Hickel, M. S. Mihatsch, S. J. Schmidt, N. A. Adams

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

We present implicit large-eddy simulations (LES) to study the primary breakup of cavitating liquid jets. The considered configuration, which consists of a rectangular nozzle geometry, adopts the setup of a reference experiment for validation. The setup is a generic reproduction of a scaled-up automotive fuel injector. Modelling of all components (i.e. gas, liquid, and vapor) is based on a barotropic two-fluid two-phase model and employs a homogenous mixture approach. The cavitating liquid model assumes thermodynamic- equilibrium. Compressibility of all phases is considered in order to capture pressure wave dynamics of collapse events. Since development of cavitation significantly affects jet break-up characteristics, we study three different operating points. We identify three main mechanisms which induce primary jet break-up: amplification of turbulent fluctuations, gas entrainment, and collapse events near the liquid-gas interface.

Original languageEnglish
Article number012096
JournalJournal of Physics: Conference Series
Volume656
Issue number1
DOIs
StatePublished - 3 Dec 2015
Event9th International Symposium on Cavitation, CAV 2015 - Lausanne, Switzerland
Duration: 6 Dec 201510 Dec 2015

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