Abstract
A new procedure for optimization of aerodynamic properties of trains is presented. Instead of large number of evaluations of Navier-Stokes solver, simple polynomial response surface models are used as a basis for optimization. The suggested optimization strategy is demonstrated on two flow optimization cases: optimization of the train’s front for the crosswind stability and optimization of vortex generators for purpose of drag reduction. Besides finding global minimum for each aerodynamic objective, a strategy for finding a set of optimal solution is demonstrated. This is based on usage of generic algorithms onto response surface models. The resulting solutions called Pareto-optimal help to explore the extreme designs and to find tradeoffs between design objectives. The paper shows that accuracy of the polynomial response surfaces is good and suitable for optimization of train aerodynamics.
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Krajnović, S. (2009). Optimization of Aerodynamic Properties of High-Speed Trains with CFD and Response Surface Models. In: Browand, F., McCallen, R., Ross, J. (eds) The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains. Lecture Notes in Applied and Computational Mechanics, vol 41. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85070-0_16
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DOI: https://doi.org/10.1007/978-3-540-85070-0_16
Publisher Name: Springer, Berlin, Heidelberg
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