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Published in: Optimization and Engineering 4/2020

01-02-2020 | Research Article

Efficient aerodynamic shape optimization through reduced order CFD modeling

Authors: Peng Shengfang, Zhang Junjie, Zhang Chunyu

Published in: Optimization and Engineering | Issue 4/2020

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Abstract

Although computational power is increasingly available, high-fidelity simulation based aerodynamic shape optimization is still challenging for industrial applications. To make the simulation based optimization acceptable in the practice of engineering design, a technique combining mesh morphing and reduced order modeling is proposed for efficient aerodynamic optimization based on CFD simulations. The former technique avoids the time-consuming procedure of geometry discretization. And the latter speeds up the procedure of field solution by exploiting pre-computed solution snapshots. To test the efficiency of the proposed method, the windshield of a motorbike is analyzed and optimized. It is shown that even the total number of cells of the mesh is around 0.4 million, the CFD computation and the post-processing of the results can be completed in less than 10 s if the reduced order model is adopted. Running on a personal computer, the generic algorithm is applied to optimize the profile of the windshield. A 8% reduction of the drag coefficient is achieved after 800 queries of the reduced order CFD model and the total CPU time is only around 2 h.

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Metadata
Title
Efficient aerodynamic shape optimization through reduced order CFD modeling
Authors
Peng Shengfang
Zhang Junjie
Zhang Chunyu
Publication date
01-02-2020
Publisher
Springer US
Published in
Optimization and Engineering / Issue 4/2020
Print ISSN: 1389-4420
Electronic ISSN: 1573-2924
DOI
https://doi.org/10.1007/s11081-020-09489-9

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