A study of the slipstreams of high-speed passenger trains and freight trains
A study of the slipstreams of high-speed passenger trains and freight trains
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DOI：
10.1243/09544097jrrt133
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
Mark Sterling;Chris Baker;Sarah Jordan;T. Johnson
中科院分区：
文献类型：
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作者：
Mark Sterling;Chris Baker;Sarah Jordan;T. Johnson
摘要：随着客运和货运列车速度的提高，人们越来越担心列车边界层和尾流中产生的不稳定阵风将给站台候车的乘客和轨旁工作人员带来更大的风险。此外，互操作性的需求使得这个问题与整个欧洲的铁路运营商越来越相关。近年来进行了许多模型规模和全规模实验，为量化这些流动提供了可靠的实验数据。本文考虑了高速旅客列车和集装箱货运列车的所有可用数据集，并对它们进行比较，得出了一些关于列车滑流特征的结论。结论是，早期工作中对许多不同流动区域的识别通常是有效的，并且形成了考虑该问题的有用框架。每个地区的气流特征都不同，并且根据列车类型、距列车的测量距离和离地高度的不同，观测到的列车峰值阵风可能发生在列车通过期间或其尾流中的任何时间。还得出结论，从小规模移动模型周围的测量获得的结果与全尺寸测量非常一致，并再现了所有重要的流动特征。
Abstract As the speeds of both passenger and freight trains increase, there is increasing concern that the unsteady gusts generated in train boundary layers and wakes will become more of for a risk to passengers waiting on platforms and for trackside workers. In addition, the demands of interoperability make this a problem of growing relevance to railway operators across Europe. A number of model scale and full-scale experiments have been carried out in recent years that have provided robust experimental data to quantify these flows. This paper considers all the available datasets for high-speed passenger trains and container freight trains, and in making a comparison between them, arrives at a number of conclusions concerning the characteristics of train slipstreams. It is concluded that the identification of a number of distinct flow regions in earlier work is generally valid and forms a useful framework for the consideration of the problem. The flow characteristics are different in each region, and, depending upon the train type, the measurement distance from the train and height above ground, the observed peak gusts for a train may occur at any time during the train passage or in its wake. It is also concluded that results obtained from measurements around small scale moving models are in good agreement with the full scale measurements and reproduce all the important flow features.