RANS Analysis of Merging Supersonic Streamwise Vortices for Enhanced Mixing in Scramjet Combustors

Donal McCaughey*, Marco Geron, Rob Watson

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

Streamwise vortices are studied as a mixing enhancer for scramjet combustors due to their insensitivity to compressibility relative to spanwise structures. A specific merging interaction between supersonic corotating vortices has been shown in experiments to sustain turbulence production against decay. In this paper this interaction is investigated numerically to determine how well it can be replicated with a RANS approach, and the effect of increasing the Mach
number. The shape and rotation of the merging vortices appears similar to experimental results.
The decay of vorticity follows a similar trend to experimental results, however the vorticity was higher in the RANS results. At higher Mach numbers the merging process appears to be pushed further down the domain.
Original languageEnglish
DOIs
Publication statusPublished - 03 Jan 2022
EventAIAA SCITECH 2022 - San Diego, CA & Online, San Diego, United States
Duration: 03 Jan 202207 Jan 2022
https://www.aiaa.org/scitech

Conference

ConferenceAIAA SCITECH 2022
Country/TerritoryUnited States
CitySan Diego
Period03/01/202207/01/2022
Internet address

Keywords

  • CFD (Computational fluid dynamics)
  • Mixing
  • Scramjet

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