A complete turbulence model is presented in which the turbulent Prandtl and Schmidt numbers are calculated as part of the solution and in which averages involving chemical source terms are modeled. The model avoids the use of assumed or evolution probability distribution functions and thus results in a highly efficient algorithm for reacting flows. The predictions from the model are compared with two sets of experiments involving supersonic mixing and one involving supersonic combustion. Two sets of H2/air chemical kinetic mechanisms are considered: one involving 7 species and 7 reactions, the other involving 9 species and 19 reactions, with reaction rates being dependent on both pressure and temperature. The results demonstrate the need for consideration of turbulence/chemistry interactions in supersonic combustion. In general, good agreement with the experiment is indicated.


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    Title :

    Modeling scramjet flows with variable turbulent Prandtl and Schmidt numbers


    Additional title:

    Modellierung von Scramjet-Strömungen mit variablen turbulenten Prandtl- und Schmidt-Zahlen


    Contributors:
    Xiao, X. (author) / Hassan, H.A. (author) / Baurle, R.A. (author)

    Published in:

    AIAA Journal (online) ; 45 , 6 ; 1415-1423


    Publication date :

    2007


    Size :

    9 Seiten, 14 Bilder, 16 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Modeling Scramjet Flows with Variable Turbulent Prandtl and Schmidt Numbers

    Xudong Xiao / Hassan Hassan / Robert Baurle | AIAA | 2007


    Modeling Scramjet Flows with Variable Turbulent Prandtl and Schmidt Numbers

    Xiao, Xudong / Hassan, Hassan / Baurle, R. | AIAA | 2006


    Modeling Scramjet Flows with Variable Turbulent Prandtl and Schmidt Numbers

    Xiao, X. / Hassan, H. A. / Baurle, R. A. | NTRS | 2006



    Modeling Scramjet Flows with Variable Turbulent Prandtl and Schmidt Numbers (AIAA 2006-0128)

    Xiao, X. / Hassan, H. A. / Baurle, R. A. et al. | British Library Conference Proceedings | 2006