The paper presents results of a wind tunnel test campaign of a high speed train carried out at the GroWiKa wind tunnel of the TU-Berlin. The main goal of the study was to gain certain details of a high speed train's flow field imposed to strong cross winds. In order to assess the influence of the infrastructure on the developing flow field, the investigations were performed with a scaled ICE3 model (1:15), Re=3.34 x 105 and three different local infrastructure features. Besides the true flat ground (FG according to TSI HS RST and DB Ril807) configuration, the standard single track with ballast and rail one (STBR according to prEN 14067-6:2009) and a typical DB standard bridge deck configuration were studied for two wind scenarios, i.e. a pure cross wind (yaw=90 deg) and a yaw angle of 30 deg which is more relevant to fast running high speed trains. However, the post processing of the measurement data obtained for oblique inflow is in progress and the present paper has to be focused on the orthogonal case, thus. A comparison of the results should provide a more detailed picture of local differences in the resulting flow field induced by different track types. Of major interest are improvements in the understanding of reasons for deviations of the aerodynamic properties of vehicles placed on such structures. The studies will help to gain further insight into the details of the flow development around the train and may be used for validation purposes. The measurements were performed mainly by means of a two component LDV probe allowing the simultaneous determination of stream wise and wall normal velocity components with a high spatial resolution.
Wind tunnel experiments of a high speed train exposed to cross wind on ground and bridge configurations
Windkanaluntersuchung eines Hochgeschwindigkeitszuges, der Seitenwind auf Erdboden- und Brückenkonfigurationen ausgesetzt ist
2009
13 Seiten, 17 Bilder, 14 Quellen
Conference paper
English
Wind tunnel experiments with a high-speed train model subject to cross wind conditions
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