Roughness-Induced Laminar-Turbulent Transition in the Boundary Layer of a Capsule-Like Geometry at Mach 20 Including Non-equilibrium

Antonio Di Giovanni, Christian Stemmer

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Direct Numerical Simulations are performed to investigate the instability mechanisms in a capsule-like configuration with a rough wall under typical re-entry conditions. The growth of unstable crossflow-type modes induced by a patch of randomly distributed roughness is analyzed in both the linear and non-linear stages up to laminar-turbulent breakdown. At the considered conditions, molecular dissociation and non-equilibrium effects significantly change the temperature profiles of the capsule boundary layer and have a non-negligible effect on the stability properties of the roughness wake.

Original languageEnglish
Title of host publicationIUTAM Bookseries
PublisherSpringer Science and Business Media B.V.
Pages531-539
Number of pages9
DOIs
StatePublished - 2022

Publication series

NameIUTAM Bookseries
Volume38
ISSN (Print)1875-3507
ISSN (Electronic)1875-3493

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