Abstract In this paper, different compressible correction strategies for k-ω turbulence model are proposed. The dilatation dissipation term, which is significant in compressible flow, is taken into account and modeled in the Favre-averaged k-equation and ω-equation. We propose correction model for the dilation dissipation term based on the gradient Mach number in this paper, the coefficients of which are calibrated from experimental data on compressible turbulent mixed layers, and compare it to the Wilcox, Sarkar, and Heinz correction models. In slope-cavity flow and oblique shock wave/boundary layer interactions, the performance of these corrections is evaluated and compared to experimental data. The new correction has a similar or even better effect in separation prediction, heat flux prediction, and other aspects, and the uncertainty of model form and coefficients can be investigated further.

    Highlights A general compressible correction model is conducted with the consideration of dilatation and structural compressibility. The experimental data of compressible turbulent mixed layers is employed to calibrate the model coefficients. Verification and validation are carried out in slope-cavity flow and incident oblique shock wave/boundary layer interactions. The performance of the model and its comparison with other correction models are discussed.


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    Titel :

    Compressible correction for separated and shear flow based on structural compressibility


    Beteiligte:
    Yi, Chen (Autor:in) / Zhang, Zhen (Autor:in) / Li, Jinping (Autor:in) / Zeng, Fanzhi (Autor:in) / Yan, Chao (Autor:in)

    Erschienen in:

    Acta Astronautica ; 210 ; 372-383


    Erscheinungsdatum :

    2023-05-30


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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