This paper describes the results of wind tunnel tests that were carried out to measure the aerodynamic characteristics of an electrical multiple unit (EMU) vehicle in a cross wind. The measurements were made on a 1/30 scale model of the Class 365 EMU in a simulation of the natural wind. The time histories of surface pressures were measured at a large number of points over the vehicle from which the aerodynamic characteristics and force coefficients were determined. This paper describes the complexfluctuating pressure field over the vehicle, through a consideration of the mean and fluctuating pressure coefficients and their spectra, and through a proper orthogonal decomposition analysis, which identifies the major modes of this distribution. The mean, fluctuating, and extreme aerodynamic side and lift forces are also discussed. It is shown that the flow pattern around the vehicle is dominated by large windward roof corner pressure fluctuations.


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    Title :

    Aerodynamic forces on multiple unit trains in cross winds


    Additional title:

    Aerodynamische Kräfte auf Eisenbahnzüge mit verschiedenen Aufbauten bei Seitenwind


    Contributors:

    Published in:

    Publication date :

    2009


    Size :

    14 Seiten, 27 Bilder, 4 Tabellen, 22 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Aerodynamic forces on freight trains

    Hammitt, Andrew G. | SLUB | 1978





    Multiple-unit trains

    Graff-Baker, W.S. | Engineering Index Backfile | 1950