This report provides an assessment of current turbulent flow calculation methods for hypersonic propulsion flowpaths, particularly the scramjet engine. Emphasis is placed on Reynolds-averaged Navier-Stokes (RANS) methods, but some discussion of newer meth- ods such as Large Eddy Simulation (LES) is also provided. The report is organized by considering technical issues throughout the scramjet-powered vehicle flowpath including laminar-to-turbulent boundary layer transition, shock wave / turbulent boundary layer interactions, scalar transport modeling (specifically the significance of turbulent Prandtl and Schmidt numbers) and compressible mixing. Unit problems are primarily used to conduct the assessment. In the combustor, results from calculations of a direct connect supersonic combustion experiment are also used to address the effects of turbulence model selection and in particular settings for the turbulent Prandtl and Schmidt numbers. It is concluded that RANS turbulence modeling shortfalls are still a major limitation to the accuracy of hypersonic propulsion simulations, whether considering individual components or an overall system. Newer methods such as LES-based techniques may be promising, but are not yet at a maturity to be used routinely by the hypersonic propulsion community. The need for fundamental experiments to provide data for turbulence model development and validation is discussed.


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    Titel :

    Status of Turbulence Modeling for Hypersonic Propulsion Flowpaths


    Beteiligte:
    Georgiadis, Nicholas J. (Autor:in) / Yoder, Dennis A. (Autor:in) / Vyas, Manan A. (Autor:in) / Engblom, William A. (Autor:in) / FROM (Autor:in)

    Kongress:

    47th Joint Propulsion Conference and Exhibit ; 2011 ; San Diego, CA, United States


    Erscheinungsdatum :

    2012-04-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Status of Turbulence Modeling for Hypersonic Propulsion Flowpaths

    N. J. Georgiadis / D. A. Yoder / M. A. Vyas et al. | NTIS | 2012


    Status of Turbulence Modeling for Hypersonic Propulsion Flowpaths

    Georgiadis, Nicholas / Yoder, Dennis / Vyas, Manan et al. | AIAA | 2011


    Preliminary Design Methodology for Hypersonic Engine Flowpaths

    Torrez, S. / Driscoll, J. / Dalle, D. et al. | British Library Conference Proceedings | 2009


    Preliminary Design Methodology for Hypersonic Engine Flowpaths

    Torrez, Sean / Driscoll, James / Dalle, Derek et al. | AIAA | 2009


    Design of Dual-Mode Engine Flowpaths for Hypersonic Vehicles Using Reduced-Order Models

    Torrez, S. / Dalle, D. / Driscoll, J. et al. | British Library Conference Proceedings | 2011