Aerospace vehicles flying at supersonic and hypersonic speeds are subject to increased wall heating rates caused by viscous friction with the gas environment. This extra heat is commonly referred to as convective aerodynamic heating. In wall-modeled large-eddy simulations, the near-wall region of the flow is not resolved by the computational grid. As a result, the effects of aerodynamic heating need to be modeled using a large-eddy simulation wall model. In this investigation, wall-modeled large-eddy simulations of turbulent high-speed flows are performed to address this issue. In particular, an equilibrium wall model is employed in high-speed turbulent Couette flows subject to different combinations of thermal boundary conditions and grid sizes as well as in transitional hypersonic boundary layers interacting with incident shock waves. Specifically, the wall-modeled large-eddy simulations of the Couette flow configuration demonstrate that the shear-stress and heat-flux predictions made by the wall model show only a small sensitivity to the grid resolution even in the most adverse case where aerodynamic heating prevails near the wall and generates a sharp temperature peak there. Additionally, the simulations indicate that the wall model predicts shear stresses and heat fluxes that are mostly proportional to the near-wall velocity in a manner that resembles an approximate power law. In the wall-modeled large-eddy simulation of hypersonic boundary-layer/shock-wave interaction, the model is tested against direct numerical simulations and experiments. It is shown to correctly capture aerodynamic heating and the overall heat transfer rate around the shock-impingement zone, despite the fact that the adverse pressure gradients in that region may involve nonequilibrium effects.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Aerodynamic Heating in Wall-Modeled Large-Eddy Simulation of High-Speed Flows


    Beteiligte:
    Yang, X. I. A. (Autor:in) / Urzay, J. (Autor:in) / Bose, S. (Autor:in) / Moin, P. (Autor:in)

    Erschienen in:

    AIAA Journal ; 56 , 2 ; 731-742


    Erscheinungsdatum :

    2017-11-28


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Wall-Modeled Large Eddy Simulation of High Speed Flows

    Mettu, Balachandra R. / Subbareddy, Pramod K. | AIAA | 2022


    Assessing Wall-Modeled Large-Eddy Simulation for Low-Speed Flows with Heat Transfer

    Xu, Haosen H. A. / Yang, Xiang I. A. / Milani, Pedro M. | AIAA | 2021


    An Immersed Boundary Wall-Modeled Large-Eddy Simulation Approach for Low Speed Turbulent Flows

    Ganju, Sparsh / van Noordt, William / Brehm, Christoph | AIAA | 2022


    WALL-MODELED LARGE-EDDY SIMULATIONS OF LOW-SPEED FLOWS WITH HEAT TRANSFER

    Yang, Xiang I. / Xu, Haosen / Milani, Pedro | TIBKAT | 2021


    Wall-modeled Large-eddy Simulations of Low-speed Flows with Heat Transfer

    Yang, Xiang I. / Xu, Haosen / Milani, Pedro | AIAA | 2021