The work provides an integrated pipeline for the model order reduction of turbulent flows around parametrised geometries in aerodynamics. In particular, Free-Form Deformation is applied for geometry parametrisation, whereas two different reduced-order models based on Proper Orthogonal Decomposition (POD) are employed in order to speed-up the full-order simulations: the first method exploits POD with interpolation, while the second one is based on domain decomposition. For the sampling of the parameter space, we adopt a Greedy strategy coupled with Constrained Centroidal Voronoi Tessellations, in order to guarantee a good compromise between space exploration and exploitation. The proposed framework is tested on an industrially relevant application, i.e. the front-bumper morphing of the DrivAer car model, using the finite-volume method for the full-order resolution of the Reynolds-Averaged Navier-Stokes equations.

Free-form deformation, mesh morphing and reduced-order methods: enablers for efficient aerodynamic shape optimisation / Salmoiraghi, F.; Scardigli, A.; Telib, H.; Rozza, G.. - In: INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS. - ISSN 1061-8562. - 32:4-5(2018), pp. 233-247. [10.1080/10618562.2018.1514115]

Free-form deformation, mesh morphing and reduced-order methods: enablers for efficient aerodynamic shape optimisation

Salmoiraghi, F.;Scardigli, A.;Rozza, G.
2018-01-01

Abstract

The work provides an integrated pipeline for the model order reduction of turbulent flows around parametrised geometries in aerodynamics. In particular, Free-Form Deformation is applied for geometry parametrisation, whereas two different reduced-order models based on Proper Orthogonal Decomposition (POD) are employed in order to speed-up the full-order simulations: the first method exploits POD with interpolation, while the second one is based on domain decomposition. For the sampling of the parameter space, we adopt a Greedy strategy coupled with Constrained Centroidal Voronoi Tessellations, in order to guarantee a good compromise between space exploration and exploitation. The proposed framework is tested on an industrially relevant application, i.e. the front-bumper morphing of the DrivAer car model, using the finite-volume method for the full-order resolution of the Reynolds-Averaged Navier-Stokes equations.
2018
32
4-5
233
247
https://doi.org/10.1080/10618562.2018.1514115
https://arxiv.org/abs/1803.04688v2
Salmoiraghi, F.; Scardigli, A.; Telib, H.; Rozza, G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/83718
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