Browse Publications Technical Papers 2017-01-1510
2017-03-28

A Spline-Based Modeling Algorithm for Application to Aerodynamic Shape Optimization Based on CFD Analysis 2017-01-1510

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
We also recommend:
TECHNICAL PAPER

Development of the Aerodynamics of the New Nissan Murano

2015-01-1542

View Details

JOURNAL ARTICLE

Vehicle Aerodynamics Simulation for the Next Generation on the K Computer: Part 2 Use of Dirty CAD Data with Modified Cartesian Grid Approach

2014-01-0580

View Details

TECHNICAL PAPER

Automation of Vehicle Aerodynamic Shape Exploration and Optimization using Integrated Mesh Morphing and CFD

2011-01-0170

View Details

X