A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Efficient aerodynamic shape optimization through reduced order CFD modeling
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.
Efficient aerodynamic shape optimization through reduced order CFD modeling
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.
Efficient aerodynamic shape optimization through reduced order CFD modeling
Optim Eng
Shengfang, Peng (author) / Junjie, Zhang (author) / Chunyu, Zhang (author)
Optimization and Engineering ; 21 ; 1599-1611
2020-12-01
13 pages
Article (Journal)
Electronic Resource
English
Efficient aerodynamic shape optimization by structure exploitation
| Springer Verlag | 2012
Efficient aerodynamic shape optimization by structure exploitation
| Online Contents | 2012
Aerodynamic Shape Optimization Using First and Second Order Adjoint and Direct Approaches
| Online Contents | 2008
Aerodynamic Shape Optimization for High-Rise Conceptual Design
| TIBKAT | 2020
An adaptive geometry parametrization for aerodynamic shape optimization
| Springer Verlag | 2013