A new surrogate modeling approach is developed that augments the loads from an analysis over an undeformed surface in order to account for the effects of static surface deformations in high-speed flows. The approach relies on pointwise data-driven surrogates to approximate the nonlinear flow mechanics and theoretical expressions to identify the surrogate input parameters. The pointwise nature of the model enables efficient construction with minimal assumptions on the surface deformation. The accuracy of the modeling strategy is evaluated relative to steady Reynolds-averaged Navier–Stokes analyses for prescribed deformations and quasi-static aerothermoelastic response prediction. Basic fluid loads models and conventional kriging interpolation models, where deformation is parameterized using global characteristic shapes, are also considered. The new surrogate approach yields normalized root mean square errors of less than 5% relative to steady Reynolds-averaged Navier–Stokes predictions of pressure and heat flux over prescribed deformations. Results for aerothermoelastic simulations highlight that the approach outperforms all other models in terms of predicting the thermo-structural response and fluid loads. In regard to computational requirements, the new approach affords a 93% reduction in the offline costs compared with conventional kriging models and is several orders of magnitude faster than Reynolds-averaged Navier–Stokes simulations for online predictions.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Generalized Treatment of Surface Deformation for High-Speed Computational Fluid Dynamic Surrogates


    Beteiligte:

    Erschienen in:

    AIAA Journal ; 58 , 1 ; 329-340


    Erscheinungsdatum :

    2019-09-06


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    GENERALIZED COORDINATE SURROGATES FOR INTEGRATED ESTIMATION AND CONTROL

    NELSON GABRIEL / STEPHENS BENJAMIN | Europäisches Patentamt | 2023

    Freier Zugriff

    Generalized coordinate surrogates for integrated estimation and control

    NELSON GABRIEL / STEPHENS BENJAMIN | Europäisches Patentamt | 2023

    Freier Zugriff

    Generalized Coordinate Surrogates for Integrated Estimation and Control

    NELSON GABRIEL / STEPHENS BENJAMIN | Europäisches Patentamt | 2021

    Freier Zugriff

    Generalized coordinate surrogates for integrated estimation and control

    NELSON GABRIEL / STEPHENS BENJAMIN | Europäisches Patentamt | 2018

    Freier Zugriff

    Computational Fluid Dynamic Approach for Aerodynamic of the French High Speed Train

    Masbernat, F. / Wollfhugel, Y. F. / Dumas, J. C. et al. | British Library Conference Proceedings | 1992