Other
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.563..317s&link_type=abstract
Proceedings of the Fifth European Symposium on Aerothermodynamics for Space Vehicles (ESA SP-563). 8-11 November 2004, Cologne,
Other
Scientific paper
Investigations on laminar-turbulent transition for high-speed flows at hypersonic Mach-numbers will be presented. Dissociation takes place above a temperature of T>2000K within the boundary layer, a temperature which is reached easily at hypersonic Mach-numbers above M≈5. Additional degrees of freedom for the energy must be taken into account by employing a vibrational energy equation. Chemical reactions take place which are modeled by a 5-species model proposed by Park (1989, 1990). Further details on the chemical modeling can be found in Stemmer (2002, 2003). Controlled disturbances are introduced by means of a disturbance strip (Besteck & Eißler 1996) at the wall which is also capable of modeling point source disturbances. Results will be shown for free-flight conditions at an altitude of H=50Km and at a speed of M=20. Experiments for qualitative validation of the results are available in Mironov & Maslov (2000). Key words: hypersonic flow, transition, chemical reactions, high-temperature gas effects.
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