平入式地铁出入口风压作用CFD模拟研究
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摘要
以重庆市地铁1号线沙坪坝站1号出入口为实际物理模型,采用CFD方法对平入式地铁出入口的风压作用进行了研究。比较了地铁出入口封闭与不封闭时的风压与风压系数(Cp)的变化,发现上述两种情况下的风压与风压系数差别较大。此外,还研究了风速对风压系数(Cp)的影响,得出封闭与不封闭的出入口的风压系数随风速变化的趋势并不相同。
In this paper, wind pressure on the level subway entrance is studied by CFD method, and it takes the 1 st entrance of Shapingba Subway Station of Chongqing Subway Line 1 as an actual physical model. Compared the variation of wind pressure and wind pressure coefficient(Cp) when subway entrance is closed and unclosed, and find out wind pressure and wind pressure coefficient of the above two conditions are significantly different. In addition, the influence of wind velocity on wind pressure coefficient(Cp) is studied, it has shown that the trend of Cp is different whether the entrance closed or unclosed.
In this paper, wind pressure on the level subway entrance is studied by CFD method, and it takes the 1 st entrance of Shapingba Subway Station of Chongqing Subway Line 1 as an actual physical model. Compared the variation of wind pressure and wind pressure coefficient(Cp) when subway entrance is closed and unclosed, and find out wind pressure and wind pressure coefficient of the above two conditions are significantly different. In addition, the influence of wind velocity on wind pressure coefficient(Cp) is studied, it has shown that the trend of Cp is different whether the entrance closed or unclosed.
引文
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[2]BS 5925 Code of practice for ventilation principles and designing for natural ventilation[M].British Standards Institution,London,1991.
[3]BS 6399 Ch.V-Loading for buildings:Code of practice for wind loads[M].British Standards Institution,London,1997.
[4]Liddament M W.Air infiltration calculation techniques-an application guide[M].Air Infiltration and Ventilation Centre,International Network for Information on Ventilation,Brussels,Belgium,1986.
[5]李红祥.风压作用下自然通风阻力特性研究[D].长沙:湖南大学,2004.
[6]龚光彩,李红祥,李玉国.自然通风的应用与研究[J].建筑热能通风空调,2003,(4):4-6,20.
[7]Y Li,A Delsante,J Symons.Prediction of natural ventilation in buildings with large openings[J].Building and Environment,2001,35(3):191-206.
[8]李勋.地铁出入口及风亭环境景观设计研究[D].杨凌:西北农林科技大学,2013.
[9]姬利伟.地铁车站出入口设计方法[J].铁道标准设计,2011,(7):78-83.
[10]高峰.地铁出入口及地面建筑环境装饰[D].西安:西安建筑科技大学,2014.
[11]金招芬,朱颖心.建筑环境学[M].北京:中国建筑工业出版社,2010.
[12]Chia-Ren,Y H Chiu.Wind-driven natural ventilation for buildings with two openings on the same external wall[J].Energy and Buildings,2015,108:365-372.