An inviscid computational fluid dynamics (CFD) code is presented which can handle multiple component species, simple chemical reactions, a completely general equation of state and velocities up to hundreds of km/sec. The code can also handle multiple moving zones containing different media. Radiation effects are not included. The code uses third order spatial extrapolation/interpolation of the primitive variables to determine cell boundary values, applies limiting procedures to these values to maintain code stability and accuracy, and then uses Godunov procedures to calculate the cell boundary fluxes. The code numerical methods are presented in some detail and the results of benchmark test cases used to proof out the code are given. The agreement between the CFD and exact analytical calculations is found to be excellent. The code is used to investigate a ramjet-in-tube concept. In this concept, a projectile flies down a tube filled with combustible gas mixtures. The mixtures studied are H2 plus O2 plus excess H2 or N2 or CO2 as diluent. The projectile velocity range is 4 to 10 km/sec. Efficiencies up to 0.26 and ratios of effective projectile thrust pressure to maximum cycle pressure up to 0.12 are obtained. Plots of the pressure field around the projectile are presented.


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    Titel :

    A computational fluid dynamics code for the investigation of ramjet-in-tube concepts


    Weitere Titelangaben:

    Ein fluiddynamisches Rechenverfahren fuer die Untersuchung von Rohr-Staustrahltriebwerkskonzepten


    Beteiligte:
    Bogdanoff, D.W. (Autor:in) / Brackett, D.C. (Autor:in)

    Erschienen in:

    AIAA-Papers ; Jul ; 1-9


    Erscheinungsdatum :

    1987


    Format / Umfang :

    9 Seiten, 9 Bilder, 1 Tabelle, 18 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch






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