Abstract
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).
| Original language | English |
|---|---|
| Pages (from-to) | 317-322 |
| Number of pages | 6 |
| Journal | European Space Agency, (Special Publication) ESA SP |
| Issue number | 563 |
| State | Published - 2004 |
| Externally published | Yes |
| Event | 5th European Symposium on Aerothermodynamics for Space Vehicles - Cologne, Germany Duration: 8 Nov 2004 → 11 Nov 2004 |
Keywords
- Chemical reactions
- High-temperature gas effects
- Hypersonic flow
- Transition