Experimental study of aerodynamic characteristics of high-speed train on bridge-tunnel junctions under crosswinds

Abstract

This paper introduces a moving train model experimental study concerning aerodynamic characteristics of a Fuxing train with a scale ratio of 1:16.8 passing a bridge-tunnel junction under crosswinds. This experiment was carried out using the moving model experimental device independently developed by the Wind Tunnel Laboratory at Central South University. A wireless pressure measuring device mounted on the vehicle body was used to monitor aerodynamic pressure on train surface and the pressure can be used to calculate the aerodynamic force by integration. The results show when the train passes the bridge-tunnel junction under crosswinds, the side force of the train will dramatically change from negative to positive or from positive to negative and the standard deviation of pressure on train windward surface is larger than that on train leeward surface. The aerodynamic change patterns of trains on the windward and leeward tracks are similar, but the side force of the train running on the windward track is generally more significant than that on the leeward track; the main reason is that compared with the train on leeward track, the negative pressure on windward surface is smaller and that on leeward surface is larger.

Keywords

crosswinds / moving train / tunnel-bridge junction / pressure measurement / track position / wind tunnel test

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