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首页> 外文期刊>Journal of aerospace engineering >Aerodynamic Effects of Viaduct-Cutting Connection Section on High-Speed Railway by Wind Tunnel Tests
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Aerodynamic Effects of Viaduct-Cutting Connection Section on High-Speed Railway by Wind Tunnel Tests

机译：风洞试验对高铁高架桥连接段的空气动力学影响

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摘要

The wind environment and aerodynamic characteristics of vehicles are easily affected by the structural form of the railway. To investigate the aerodynamic effects of viaduct-cutting connection sections on vehicles, models of standard cutting, viaduct, and China Railway Highspeed (CRH2) trains at a scale of 1:20 were tested in wind tunnel tests. The wind speed profiles and vehicle aerodynamic coefficients were developed using a Cobra probe and balance, respectively. Additionally, the effects of wind barriers were applied. The test results indicate that the wind speed profile at the railway juncture is almost independent of the lateral positions at the same position. The aerodynamic influence of vehicles on different tracks (windward and leeward railway tracks) is different. Moreover, wind barriers can change both wind speed profiles and aerodynamic coefficients and significantly reduces wind speed and changes the aerodynamic coefficients to improve vehicle wind-resistant performance.
机译：车辆的风环境和空气动力特性很容易受到铁路结构形式的影响。为了研究高架桥切割连接段对车辆的空气动力学影响，在风洞测试中测试了标准切割，高架桥和1:20比例的中国铁路高铁（CRH2）火车的模型。分别使用Cobra探头和天平开发了风速曲线和车辆空气动力系数。此外，还应用了风障的效果。测试结果表明，铁路交界处的风速分布几乎与相同位置的横向位置无关。车辆在不同轨道（迎风和背风铁路轨道）上的空气动力学影响是不同的。此外，挡风板可以改变风速分布和空气动力学系数，并显着降低风速并改变空气动力学系数，以提高车辆的抗风性能。

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