Air-shaft entrance hood model with fence is investigated to reduce micro pressure wave in a single-track tunnel of the high-speed railway. Aerodynamically designed airshaft hoods are classified by 5 cases according to fence types and the micro pressure waves are measured by the low frequency sound level meters installed at a tunnel exit of a moving model test rig with a scale ratio of 1/64. Based on the case of no hood model, 5 different hood models were tested and analyzed for the speed of a model train from 180 km/h to 250 km/h.

中文翻译：

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空气竖井入口罩的详细形状对隧道压力波的影响

为了降低高速铁路单线隧道中的微压力波，研究了带围栏的气井入口罩模型。空气动力学设计的气井发动机罩根据围栏类型分为5种情况，微压力波由安装在运动模型试验台的隧道出口处的低频声级计测量，比例比为1/64。在没有引擎盖模型的情况下，对5种不同的引擎盖模型进行了测试，并分析了模型火车从180 km / h到250 km / h的速度。