Abstract
A preferential coupled vibration-dissociation and exchange reactions-vibration model resulting from an extension of the well-known Treanor and Marrone coupled vibration-dissociation-vibration 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 airflows through different configurations: normal and bow shock waves, wind-tunnel nozzle, and boundary layer. Code-to-code comparisons of our model and other recent approaches and code-to-experiments comparisons have been conducted for the one-dimensional flow behind a normal shock wave
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