Experimentally Validated High-Fidelity Simulations of a Liquid Jet in Supersonic Crossflow

Michael Kuhn, Olivier Desjardins

Research output: Contribution to journalArticlepeer-review

9 Scopus Citations

Abstract

Utilizing recent advancements in computational schemes for compressible, multiphase flows, this work features a parametric study of a pure liquid jet in supersonic crossflow that involves simulating the atomization process for four values of momentum-flux ratio. These simulations are validated against experimental results measured with high-speed X-ray imaging, which confirm the accuracy of the numerical approach. Also, the effect of numerical resolution on some flow behavior is investigated, revealing convergence of the jet shape and surface instability wavelength. Analysis of the resulting sprays includes statistical descriptions of the liquid distribution, liquid structures created through breakup, interfacial instabilities, and dominant flow features. As the flowrate increases, the spray penetrates further, it becomes more disperse, and less liquid impacts the wall, but the droplet size distribution changes little. The wavelength of instabilities on the windward side of the jet diverges from measured trends in subsonic crossflows. In a visualization of the time-averaged flow, counter-rotating vortices are observed along the jet core and in the wake, affecting the process of primary atomization and early droplet trajectories.

Original languageAmerican English
Article numberArticle No. 104195
Number of pages19
JournalInternational Journal of Multiphase Flow
Volume156
DOIs
StatePublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

NREL Publication Number

  • NREL/JA-5000-82257

Keywords

  • Atomization
  • Compressible flow
  • Equivalent path length
  • Liquid jet in supersonic crossflow
  • Primary breakup
  • Transonic

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