Results of a numerical study using the direct simulation Monte Carlo (DSMC) method are presented for the hypersonic flow about an elliptically blunted cone. The flow conditions are those for a proposed Aeroassist Flight Experiment (AFE) vehicle. The altitude range considered is that from 130 to 90 km which encompasses most of the transitional flow regime for the AFE vehicle, that is, the region bounded by free molecular and continuum flow. Freestream velocities of 9.9 to 7.5 km/sec are considered. The numerical simulations show that noncontinuum effects are evident for all cases considered. The onset of chemical dissociation occurs at a simulated altitude of about 130 km. Results presented highlight the thermal and chemical nonequilibrium nature of the flowfield and the impact of these effects on the surface heating and body drag. A calculation which included the additional effects of ionization and thermal radiation demonstrates that the inclusion of such effects would not significantly alter the surface quantities calculated in the present study. The radiative heating is negligible when compared with the convective heating, and the same would be true for the other conditions considered.


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    Title :

    Direct simulation of aerothermal loads for an aeroassist flight experiment vehicle


    Additional title:

    Direkte Simulation von aerothermischen Belastungen eines luftunterstuetzten Versuchsflugzeuges


    Contributors:
    Dogra, V.K. (author) / Moss, J.N. (author) / Simmonds, A.L. (author)

    Published in:

    AIAA-Papers ; Jun ; 1-11


    Publication date :

    1987


    Size :

    11 Seiten, 13 Bilder, 3 Tabellen, 15 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Direct simulation of aerothermal loads for an aeroassist flight experiment vehicle

    DOGRA, VIRENDRA / MOSS, JAMES / SIMMONDS, ANN | AIAA | 1987


    Aeroassist Flight Experiment (AFE)

    Siemers, Paul M., III | NTRS | 1988


    The Aeroassist Flight Experiment

    Walberg, G. D. / Siemers, P. M., III / Calloway, R. L. et al. | NTRS | 1987


    Aeroassist Flight Experiment (AFE)

    P. M. Siemers | NTIS | 1988


    Flight stagnation-point heating calculations on Aeroassist Flight Experiment vehicle

    Hamilton, H. H., II / Gupta, Roop N. / Jones, Jim J. | NTRS | 1991