Abstract In this study, the natural ventilation of a horizontal entrance of a typical subway station is investigated based on numerical simulations and experiments. In addition, a renormalization group k-ɛ model (RNG k-ɛ model) is applied to compute both the internal and external airflow patterns. Computational fluid dynamics (CFD) simulations are validated based on the experimental results. Furthermore, a multiple variable regression model is employed to study how the different parameters affect the internal airflow rates of the subway station statistically, according to the experimental results. For this typical model, the parameter importance can be ranked as follows: (1) outdoor wind speed; (2) flow resistance of the subway station; (3) height of the wind catcher; and (4) length of the wind catcher. To understand the detailed pressure distribution of the horizontal entrance of the subway station with and without the wind catcher, 3D numerical simulations are conducted for different scenarios. We attempt to alter the size of the wind catcher (including the length and height) to study the characteristics of the pressure on the horizontal entrance of the subway station under outdoor wind-driven conditions. The pressure distributions for the entrance for different scenarios are compared and analyzed. Finally, the interactions between the internal and external flows are investigated by changing the resistance of the subway station. When the internal flow resistance is changed, the pressure coefficient (Cp) of the entrance is different as well. Hence, the Cp is not only affected by the outdoor environment, but is also influenced by the internal airflows.

中文翻译：

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地铁站不同类型出入口对自然通风的影响

摘要 在本研究中，基于数值模拟和实验研究了典型地铁车站水平入口的自然通风。此外，重整化群 k-ɛ 模型（RNG k-ɛ 模型）用于计算内部和外部气流模式。基于实验结果验证了计算流体动力学 (CFD) 模拟。此外，根据实验结果，采用多元回归模型来研究不同参数对地铁站内部气流速率的统计影响。对于这个典型模型，参数重要性可以排序如下： (1) 室外风速；(2)地铁站的流阻；(3) 捕风器的高度；(4) 捕风器的长度。为了了解有和没有捕风器的地铁站水平入口的详细压力分布，对不同场景进行了 3D 数值模拟。我们尝试改变捕风器的尺寸（包括长度和高度）来研究室外风驱动条件下地铁站水平入口压力的特征。对不同场景下入口的压力分布进行了比较和分析。最后，通过改变地铁站的阻力来研究内部和外部流动之间的相互作用。当内部流阻改变时，入口的压力系数（Cp）也不同。因此，Cp 不仅受室外环境的影响，