A computational study has been performed on hypersonic high-enthalpy viscous air flow past blunt bodies. In the thermochemical processes describing this nonequilibrium flow, nonpreferential or preferential vibration-dissociation-vibration coupling and vibration-vibration energy exchanges have been taken into account. A five-species reactive air mixture, in which the diatomic species N2 and O2 are in thermal nonequilibrium, was considered. The set of equations was solved using a second-order implicit finite difference scheme. Several flow conditions, corresponding to a range of Mach numbers from 14 to 18, in connection with available experiments were investigated. The predicted shock standoff distance and stagnation heat flux are in agreement with the experimental data. These conditions were used by several authors to validate their computations. Through a code-to-code comparison, the effects of the physical modeling, on the temperatures and the species mass fractions distributions, are emphasized.


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    Title :

    Vibration-dissociation coupling in nonequilibrium hypersonic viscous flows


    Additional title:

    Kopplung des Schwingungszerfalls in ungleichgewichtigen zähen Hyperschallströmungen


    Contributors:
    Zeitoun, D. (author) / Schall, E. (author) / Burtschell, Y. (author) / Druguet, M.C. (author)

    Published in:

    AIAA Journal ; 33 , 1 ; 79-85


    Publication date :

    1995


    Size :

    7 Seiten, 14 Bilder, 1 Tabelle, 22 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English