A Confidence-based Aerospace Design Approach Robust to Structural Turbulence Closure Uncertainty
| Autor: | G. Gori, O. Le Maître, P.M. Congedo |
|---|---|
| Přispěvatelé: | Uncertainty Quantification in Scientific Computing and Engineering (PLATON), Centre de Mathématiques Appliquées - Ecole Polytechnique (CMAP), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), PlaFRIM, European Project: 722734,H2020 Pilier Excellent Science,H2020-MSCA-ITN-2016,UTOPIAE(2017) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Eigenspace Perturbation Method
[SPI]Engineering Sciences [physics] Aerodynamic design General Computer Science RANS model uncertainty General Engineering [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] Robust optimization Turbulence closure uncertainty [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation |
| Zdroj: | Computers and Fluids Computers and Fluids, 2022, 246, pp.105614. ⟨10.1016/j.compfluid.2022.105614⟩ |
| ISSN: | 0045-7930 |
| DOI: | 10.1016/j.compfluid.2022.105614⟩ |
| Popis: | International audience; We propose a confidence-based design approach robust to turbulence closures model-form uncertainty in Reynolds-Averaged Navier-Stokes computational models. The Eigenspace Perturbation Method is employed to compute turbulence closure uncertainty estimates of the performance targeted by the optimizer. The magnitude of the uncertainty estimates is exploited to establish an indicator parameter associated to the credibility of numerical prediction. The proposed approach restricts the optimum search only to design space regions for which the credibility indicator suggests trustworthy RANS model predictions. In this way, we improve the efficiency of the design process, potentially avoiding designs for which the computational model is unreliable. The reference test case consists in a two-dimensional single element airfoil resembling a morphing wing section in a high-lift configuration. Results show that the prediction credibility constraint has a non negligible impact on the definition of the optimal design. |
| Databáze: | OpenAIRE |
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