Instability of high Mach number flows in the presence of high-temperature gas effects

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Abstract

For high-speed flows during re-entry conditions, the chemical reactions in the flow heavily influence the stability properties of boundary-layer flows. The possible presence of shock-induced nonequilibrium in the flow makes it necessary not only to look at equilibrium flows. Instabilities that eventually lead to laminar-turbulent transition in a hypersonic flat-plate boundary layer are investigated by direct numerical simulation of the full unsteady three-dimensional Navier-Stokes equations with appropriate additions for the chemical source terms and the thermodynamical properties. As examples, the flat-plate boundary-layer flow at M=20 at an altitude of H=50Km is examined as well as the wake flow of a boundary-layer sized object in a M=6.8 boundary-layer.

Original languageEnglish
Title of host publication7th IUTAM Symposium on Laminar-Turbulent Transition - Proceedings of the 7th IUTAM Symposium on Laminar-Turbulent Transition
PublisherSpringer Verlag
Pages391-396
Number of pages6
ISBN (Print)9789048137220
DOIs
StatePublished - 2010
Event7th IUTAM Symposium on Laminar-Turbulent Transition - Stockholm, Sweden
Duration: 23 Jun 200926 Jun 2009

Publication series

NameIUTAM Bookseries
Volume18
ISSN (Print)1875-3507

Conference

Conference7th IUTAM Symposium on Laminar-Turbulent Transition
Country/TerritorySweden
CityStockholm
Period23/06/0926/06/09

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