A Generative Design And Drag Coefficient Prediction System For Sedan Car Side Silhouettes Based On Computational Fluid Dynamics
| Autor: | Serkan Gunpinar, Mustafa Ozsipahi, Erkan Gunpinar, Umut Can Coskun |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Drag coefficient Computer science ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology Computational fluid dynamics GeneralLiterature_MISCELLANEOUS Industrial and Manufacturing Engineering Silhouette 020901 industrial engineering & automation Conceptual design Computer Science::Computational Engineering Finance and Science 0202 electrical engineering electronic engineering information engineering Generative Design Astrophysics::Galaxy Astrophysics ComputingMethodologies_COMPUTERGRAPHICS Wind tunnel Artificial neural network business.industry 020207 software engineering Computer Graphics and Computer-Aided Design Computer Science Applications Computer Science::Computer Vision and Pattern Recognition Principal component analysis Astrophysics::Earth and Planetary Astrophysics business Algorithm |
| Popis: | A design support system is developed in this work that can be integrated into the car side silhouette design tools and can estimate the drag coefficient of a given silhouette. This task is typically performed via two manners: namely wind tunnel testing and computational fluid dynamics (CFD) simulations. Due to the high computational cost for these two approaches, it is impractical to employ them during the silhouette conceptual design stage in a real time. Therefore, a mathematical model is obtained in this study for the drag coefficient estimation of a given silhouette. First, the desired number of silhouettes are generated via a generative design (silhouette sampling) technique so that the silhouettes are evenly distributed in the silhouette design space. Each silhouette is then tested via computational fluid dynamics simulations, and their corresponding drag coefficients ( C D s) are obtained. A training dataset is formed with the silhouette geometries and C D s of the silhouettes, and a mathematical model that can estimate the drag coefficient ( C D ) of a silhouette is finally obtained via principal component analysis (PCA) followed by regression/neural network methods. These three steps are repeated until a desired level of reliable mathematical model is obtained. Finally, three generative design test cases are illustrated based on the mathematical model obtained to predict C D of a given silhouette. |
| Databáze: | OpenAIRE |
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