Research on optimized design of air supply duct for subway train air conditioning

LIU Zhiyuan; LONG Yuan; LI Hang; YANG Tianzhi; YI Ke; LUO Jiangguo

doi:10.13890/j.issn.1000-128X.2024.01.104

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Research on optimized design of air supply duct for subway train air conditioning

Railway Rolling Stock | 更新时间：2024-08-02

- Research on optimized design of air supply duct for subway train air conditioning
- Electric Drive for Locomotives Issue 1, Pages: 58-63(2024)
- 作者机构：
  
  1.重载快捷大功率电力机车全国重点实验室，湖南株洲 412001
  2.中车株洲电力机车有限公司，湖南株洲 412001
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2024.01.104
  CLC： U231;U270.38⁺3
- Published：10 January 2024，
  
  Received：16 April 2022，
  
  Revised：26 June 2023，
- 稿件说明：
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刘智远, 龙源, 李行, 等. 地铁列车空调送风风道优化设计研究[J]. 机车电传动, 2024(1): 58-63.

LIU Zhiyuan, LONG Yuan, LI Hang, et al. Research on optimized design of air supply duct for subway train air conditioning[J]. Electric drive for locomotives,2024(1): 58-63.
刘智远, 龙源, 李行, 等. 地铁列车空调送风风道优化设计研究[J]. 机车电传动, 2024(1): 58-63. DOI：10.13890/j.issn.1000-128X.2024.01.104.

LIU Zhiyuan, LONG Yuan, LI Hang, et al. Research on optimized design of air supply duct for subway train air conditioning[J]. Electric drive for locomotives,2024(1): 58-63. DOI：10.13890/j.issn.1000-128X.2024.01.104.

摘要

空调送风风道是地铁列车的关键部件之一，其性能优劣极大地影响着地铁的舒适性。如何优化空调送风风道结构，提升其送风均匀性成为亟待解决的难题。为改善风道的送风量、送风均匀性和噪声等指标，文章基于均匀送风管道理论设计与计算流体动力学仿真（CFD）验证的方法，优化了空调送风风道的结构。首先基于客室低噪声要求，将动压到静压转换的腰形孔的平均出流速度控制在5 m/s；其次通过送风风道动压与静压之间的关系进行理论计算，控制动压腔内的动压和动静压腔之间的静压差来保证送风的均匀性；不同于传统的等宽动压腔风道结构，优化后的送风风道的动压腔为缩径结构，此结构可提升风道的送风均匀性。为验证理论设计方法的准确性，采用CFD计算软件对通过理论设计优化的风道结构进行了流场仿真分析，将优化风道与原始风道模型搭建在同一客室模型上，并对两种风道与客室耦合模型的仿真结果进行了对比分析。研究表明通过理论设计优化的风道结构各腰形孔的送风均匀性都控制在20%以内，客室内风速分布也得到较大改善，进一步验证了理论计算优化方法的有效性，对于空调风道的工程应用具有指导意义。

Abstract

The performance of the air supply duct

a crucial component of subway trains

significantly influences passenger comfort. Therefore

optimizing the structure of the air supply duct to enhance air supply uniformity has become an urgent concern. This study focused on improving indicators such as air supply volume

uniformity and noise through the optimization of the air supply duct structure based on theoretical design and computational fluid dynamics (CFD) simulation verification. First

to meet low noise requirements in the passenger compartment

the average outflow speed of the waist-shaped hole for converting dynamic pressure to static pressure was controlled at 5 m/s. Next

theoretical calculations of relationship between dynamic pressure and static pressure were conducted to control the dynamic pressure in the dynamic pressure chamber and the static pressure difference between the dynamic and static pressure chambers

ensuring air supply uniformity. Unlike traditional air duct structures with equal-width dynamic pressure chambers

the optimized air supply duct had a reduced diameter structure in the dynamic pressure chamber

which could improve air supply uniformity. To verify the accuracy of the theoretical design method

CFD calculation software was employed to analyze the flow field simulation of the theoretically designed optimized air duct structure. The optimized air duct model and the original air duct model were both incorporated into the same passenger compartment model

and the simulation results of the two coupled models were compared and analyzed. The findings demonstrate that the air supply uniformity of each waist-shaped hole in the optimized air duct structure was controlled within 20%

significantly improving the air speed distribution in the passenger compartment. This further validated the effectiveness of the theoretical calculation and optimization method

providing valuable guidance for the engineering application of air conditioning ducts.

关键词

地铁列车空调风道均匀性噪声数值仿真

Keywords

subway trainair conditioning ductuniformitynoisenumerical simulation

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Related Author

LIU Zhiyuan

LONG Yuan

LI Hang

YANG Tianzhi

YI Ke

LUO Jiangguo

ZHANG Hongjun

WANG Zhonghui

Related Institution

Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems

Shanghai Automotive Wind Tunnel Center, Tongji University

Locomotive Management Department, China Railway Shanghai Group Co., Ltd.

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