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.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Optimization of aerodynamic properties of high-speed trains with CFD and response surface models


    Additional title:

    Aerodynamische Optimierung von Hochgeschwindigkeitszügen mit numerischer Strömungssimulation und Response-Surface-Modellen


    Contributors:


    Publication date :

    2009


    Size :

    15 Seiten, 7 Bilder, 5 Tabellen, 8 Quellen





    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English