| Autor: |
Séror, S., Schall, E., Druguet, M.-C., Zeitoun, D.E. |
| Zdroj: |
Shock Waves; Oct1998, Vol. 8 Issue 5, p285-298, 14p |
| Abstrakt: |
A new preferential vibration-dissociation-exchange reactions coupling model – labelled CVDEV – resulting from an extension of the well-known Treanor and Marrone CVDV model, has been derived to take into account the coupling between the vibrational excitation of the $N_{2}$ and $O_{2}$ molecules and the two Zeldovich exchange reactions. Analytical expressions for the exchange reactions coupling factor and for the average vibrational energy lost – or gained – by a molecule through an exchange reaction have been developed. The influence of such a coupling has been shown by means of numerical simulations of hypersonic air flows through normal and bow shock waves. Code-to-code comparisons between our model and other recent approaches have been conducted. The infrared radiation of nitric oxide behind a normal shock wave resulting from computations with the CVDEV model has been compared with other coupling model results and to recent shock tube experimental data. These comparisons have shown a good agreement of our model results with the experimental data. In this context, the results show the prominent influence of $N_{2}$ vibration coupling on the first Zeldovich reaction, and the absence of $O_{2}$ vibration coupling effects on the second Zeldovich reaction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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