铁道标准设计2025，Vol.69Issue(11)：219-226,8.DOI:10.13238/j.issn.1004-2954.202402250001
公交化运营城际铁路隧道阻塞工况温度特性及纵向通风研究
Research on Temperature Characteristics and Longitudinal Ventilation under Congestion Conditions in Intercity Railway Tunnels with Public Transport Operation
摘要
Abstract
Intercity railways in Guangdong have characteristics of public transport operation,and congestion conditions must be considered when trains operate in section tunnels.To ensure that the inlet temperature of train air-conditioning condensers and the section air velocity meet design requirements under congestion conditions in intercity railway tunnels with public transport operation,a three-dimensional numerical simulation method was used.Taking the intercity railways in the two typical cities of Shenzhen and Guangzhou as the research objects,this study investigated the temperature characteristics and longitudinal ventilation control under train congestion conditions in double-tube single-track tunnels and single-tube double-track tunnels,and innovatively proposed recommended values for the activation time of ventilation equipment and longitudinal ventilation velocity under congestion conditions in intercity railway tunnels.The results showed that:(1)under no-ventilation conditions,the temperatures in both tunnel cross-sections exhibited distinct vertical stratification and the temperatures at all condenser inlets were basically consistent.When the congestion duration reached a certain value,all condenser inlet temperatures exceeded 45 ℃.(2)Compared with double-tube single-track tunnels,single-tube double-track tunnels had larger cross-sections,providing more heat-accumulation space above the air-conditioning condenser and allowing longer congestion durations.The tunnel ventilation system should be activated when the congestion duration of trains(CRH6F)reached 2.5 min in double-tube single-track tunnels and 6 min in single-tube double-track tunnels.(3)The required longitudinal ventilation velocity under tunnel congestion was influenced by factors such as tunnel cross-sectional size,supply-air temperature,and train type.Specifically,a larger tunnel cross-section,lower supply-air temperature,and smaller maximum heat dissipation of air-conditioning condensers resulted in a lower required longitudinal ventilation velocity.(4)The required longitudinal ventilation velocity under congestion conditions in intercity railway tunnels was significantly lower than the 2 m/s specified in the metro design code.It was recommended that the design longitudinal ventilation velocity should be 1.65 m/s for double-tube single-track tunnels and 1.0 m/s for single-tube double-track tunnels in Guangdong.关键词
铁路隧道/城际铁路/公交化运营/阻塞工况/温度特性/纵向通风/冷凝器进风口温度/数值模拟Key words
railway tunnel/intercity railway/public transport operation/congestion condition/temperature characteristics/longitudinal ventilation/condenser inlet temperature/numerical simulation分类
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刘冰,陈霖,杨波..公交化运营城际铁路隧道阻塞工况温度特性及纵向通风研究[J].铁道标准设计,2025,69(11):219-226,8.基金项目
中铁工程设计咨询集团有限公司科研课题(研2021-12) （研2021-12）
