Numerical investigation of throttle flow under cavitating conditions

Research output: Contribution to journalArticle

Abstract

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. (C) 2015 Elsevier Ltd. All rights reserved.

Details

Authors
  • Mireia Altimira
  • Laszlo Fuchs
Organisations
External organisations
  • KTH Royal Institute of Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Fluid Mechanics and Acoustics

Keywords

  • Multiphase flow, Large eddy simulation, Volume of fluid, Cavitation
Original languageEnglish
Pages (from-to)124-136
JournalInternational Journal of Multiphase Flow
Volume75
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes