Model of interior pressure fluctuation in high-speed trains considering the dynamic characteristics of variable air volume systems

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-01-28 DOI:10.1016/j.jweia.2025.106021

Boyuan Mu , Chunjun Chen , Lu Yang

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引用次数: 0

Abstract

High-speed trains experience significant interior pressure fluctuations when passing through tunnels, which can adversely affect passenger comfort and, in extreme cases, cause health issues. These fluctuations arise from rapid aerodynamic load changes and are challenging to predict accurately due to the limitations of existing models. To address this, this paper presents a stochastic modeling approach for interior pressure fluctuations, specifically tailored for the tunnel-passing scenario. The model is based on the continuity equation and the ideal gas law, integrated within a dynamic variable air volume system. It accounts for spatial airflow velocity variations, as well as the influence of airflow rate and the interior-exterior pressure difference on critical system components, including valve pressure reducing ratios, fan performance, and duct characteristics. By incorporating the effects of complex duct structures and fluctuating flow fields on gas mass transfer, the model achieves a 41.14% reduction in root mean square error and eliminates system time delays. This enhanced modeling framework provides a reliable tool for accurately predicting interior pressure dynamics during tunnel crossings, contributing to improved passenger comfort in train carriage.

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考虑变风量系统动态特性的高速列车内部压力波动模型

高速列车在通过隧道时，会经历巨大的内部压力波动，这会对乘客的舒适度产生不利影响，在极端情况下，还会导致健康问题。这些波动源于气动载荷的快速变化，由于现有模型的局限性，很难准确预测。为了解决这个问题，本文提出了一种内部压力波动的随机建模方法，专门针对隧道通过的情况。该模型基于连续性方程和理想气体定律，集成在一个动态变风量系统中。它考虑了空间气流速度的变化，以及气流速率和内外压差对系统关键部件的影响，包括阀门减压比、风机性能和风道特性。通过考虑复杂管道结构和波动流场对气体传质的影响，该模型的均方根误差降低了41.14%，并消除了系统时滞。这种增强的建模框架为准确预测隧道穿越时的内部压力动态提供了可靠的工具，有助于提高火车车厢乘客的舒适度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.