A Spline-Based Modeling Algorithm for Application to Aerodynamic Shape Optimization Based on CFD Analysis

Paper #:
  • 2017-01-1510

Published:
  • 2017-03-28
DOI:
  • 10.4271/2017-01-1510
Citation:
Song, K., Choo, K., and Mavris, D., "A Spline-Based Modeling Algorithm for Application to Aerodynamic Shape Optimization Based on CFD Analysis," SAE Int. J. Passeng. Cars - Mech. Syst. 10(2):541-552, 2017, doi:10.4271/2017-01-1510.
Pages:
12
Abstract:
In early phases of conceptual design stages for developing a new car in the modern automobile industry, the lack of systematic methodology to efficiently converge to an agreement between the aesthetics and aerodynamic performance tremendously increases budget and time. During these procedures, one of the most important tasks is to create geometric information which is versatilely morphable upon the demands of both of stylists and engineers. In this perspective, this paper proposes a Spline-based Modeling Algorithm (SMA) to implement into performing aerodynamic design optimization research based on CFD analysis. Once a 3-perspective schematic of a car is given, SMA regresses the backbone boundary lines by using optimum polynomial interpolation methods with the best goodness of fit, eventually reconstructing the 3D shape by linearly interpolating from the extracted boundaries minimizing loss of important geometric features. As a preliminary study, an aerodynamic shape optimization based on CFD analysis is conducted using ANSYS fluid dynamics solutions. To maximize the performance, we employed state-of-art design methodologies such as design-of-experiments (DOE) and surrogate modeling techniques that incorporate a series of procedures from creating geometries to conducting CFD simulations. The SMA is programmatically integrated with the CFD procedures to automatically morph and create corresponding automobile external shapes. For validation and verification, three notional vehicles are explored by investigating aerodynamic performance. Not only does the baseline geometries obtained from SMA show well-matched drag coefficients (CD) but also the optimization study results in a significant amount of CD reduction.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
1961-01-01
Book
2006-10-19
Article
2016-07-01
Technical Paper / Journal Article
1959-01-01
Article
2016-07-06
Technical Paper / Journal Article
1964-01-01
Technical Paper / Journal Article
1981-09-01
Training / Education
2011-04-20
Technical Paper / Journal Article
1931-01-01
Technical Paper / Journal Article
1962-01-01
Technical Paper / Journal Article
1960-01-01
Technical Paper / Journal Article
1908-01-01