Surrogate-based aeroelastic loads prediction in the presence of shock-induced separation. Brouwer, K. R. & McNamara, J. J. Journal of Fluids and Structures, 93:102838, February, 2020. doi abstract bibtex A surrogate-based modeling strategy is presented for robust and efficient prediction of unsteady aeroelastic loads in the presence of shock-induced separation. Enriched piston theory predictions are extended with a data-driven nonlinear autoregressive with exogenous inputs model to account for hysteresis from the interplay of a dynamically deforming surface with the separation bubble in a shock/boundary layer interaction. The approach is evaluated for prescribed surface motion and shock-induced panel flutter responses, with good agreement observed in each scenario relative to unsteady Reynolds-averaged Navier–Stokes simulations. For the latter, excellent agreement is observed in the prediction of the stability boundary and oscillation frequency. In contrast, the oscillation amplitude conservatively deviates from the Reynolds-averaged Navier–Stokes solution with increasing dynamic pressure. The online computational cost of the extended approach is orders of magnitude less than that required for predictions using an unsteady Reynolds-averaged Navier–Stokes model.
@article{brouwer2020,
title = {Surrogate-based aeroelastic loads prediction in the presence of shock-induced separation},
volume = {93},
issn = {0889-9746},
doi = {10.1016/j.jfluidstructs.2019.102838},
abstract = {A surrogate-based modeling strategy is presented for robust and efficient prediction of unsteady aeroelastic loads in the presence of shock-induced separation. Enriched piston theory predictions are extended with a data-driven nonlinear autoregressive with exogenous inputs model to account for hysteresis from the interplay of a dynamically deforming surface with the separation bubble in a shock/boundary layer interaction. The approach is evaluated for prescribed surface motion and shock-induced panel flutter responses, with good agreement observed in each scenario relative to unsteady Reynolds-averaged Navier–Stokes simulations. For the latter, excellent agreement is observed in the prediction of the stability boundary and oscillation frequency. In contrast, the oscillation amplitude conservatively deviates from the Reynolds-averaged Navier–Stokes solution with increasing dynamic pressure. The online computational cost of the extended approach is orders of magnitude less than that required for predictions using an unsteady Reynolds-averaged Navier–Stokes model.},
language = {en},
urldate = {2023-08-11},
journal = {Journal of Fluids and Structures},
author = {Brouwer, Kirk R. and McNamara, Jack J.},
month = feb,
year = {2020},
keywords = {Kriging, Limit cycle oscillation, NARX model, Panel flutter, Shock impingement, Supersonic, Surrogate models, Two-dimensional},
pages = {102838},
}
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