Direct numerical simulations of laminar-turbulent boundary-layer transition for a blunt cone at mach 6

Andrew B. Hartman, Christoph Hader, Hermann F. Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Direct Numerical Simulations (DNS) were carried out to investigate the laminar-turbulent transition for blunt (right) cones (7 half-angle) at zero angle of attack. Two cases with different Reynolds numbers based on the nose radius were investigated. Linear stability calculations were carried out employing a high-order compressible Navier-Stokes solver and using very small disturbance amplitudes in order to capture the linear (primary) instability characteristics. The results of the linear stability calculations were then used to determine which nonlinear mechanism may likely be relevant and to choose the forcing parameters (frequency and azimuthal wavenumber) for "controlled" transition simulations that may lead to the transition. In order to determine if the disturbance waves identified from the linear calculations may indeed be able to trigger nonlinear breakdown, the disturbances were introduced in the entropy layer at high amplitudes.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-13
Number of pages13
ISBN (Print)9781624106095
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

ASJC Scopus subject areas

  • Aerospace Engineering

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