An improved delayed detached eddy simulation based on a shear–stress transport κ–ω turbulence model is used to investigate the aerodynamic characteristics of a high-speed train with an aerodynamic braking plate installed in the inter-car gap (ICG) region. The flow field and the aerodynamic performance of high-speed trains with different aerodynamic braking plate configurations are compared and analysed. The numerical method used in this study is verified through a wind tunnel test. Results show that opening the plates installed in the ICG significantly increased the aerodynamic drag of the train, especially large downstream plates with relatively small fluctuations in the aerodynamic forces relative to those of large upstream plates. The braking plates significantly affected the levels of downstream ICG turbulence, which then interacted with the external flow to reduce the wake profile.

中文翻译：

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不同配置空气动力制动板安装在车间间隙区域的高速列车气动特性比较

基于剪应力传输 κ-ω 湍流模型的改进延迟分离涡模拟用于研究在车间间隙 (ICG) 区域安装气动制动板的高速列车的气动特性。对比分析了不同气动制动板配置的高速列车的流场和气动性能。本研究中使用的数值方法通过风洞试验得到验证。结果表明，打开安装在ICG中的板显着增加了列车的气动阻力，尤其是下游大板，相对于上游大板，气动力波动相对较小。制动板显着影响了下游 ICG 湍流的水平，