工字型城市地下人行通道的通风环境与优化设计研究
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摘要
为探讨我国南方多雨、湿热地区城市常采用的工字型地下人行通道的内部通风环境,揭示其夏季易潮湿结露的成因,对武汉市岳家嘴工字型地下人行通道进行现场监测;内容包括通道内的空气温度、湿度、壁面温度、风速等。借助CFD数值模拟,与实测成果进行了对比研究。结果表明:工字型地下人行通道的主通道难以实现有效的自然通风,夏季通道内处于高湿状态,易出现严重的结露状况。利用马格努斯(Magnus)公式阐释了结露现象产生的原因。对工字型地下人行通道的布局方案进行优化,利用CFD数值模拟对不同优化模型进行对比,验证了优化方案的合理性,可为南方城市修建地下人行通道工程提供借鉴。
In order to explore the ventilation environment and reveal the condensation mechanism of I-shaped pedestrian underpass adopted by cities in the rainy and humid regions in south areas of China in summer,on-site monitoring of Yuejiazui pedestrian underpass in Wuhan was carried out,including air temperature,humidity,wall temperature,wind speed,and other parameters. A contrastive analysis was made between CFD numerical simulation and the measured data. Results show that natural ventilation is difficult to achieve in main channel of the Ishaped pedestrian underpass. The underpass is often in state of high humidity and prone to condensation in summer. The reason of condensation phenomenon can be explained by Magnus formula. Different optimization models of I-shaped pedestrian underpass are compared by CFD numerical simulation,and the rationality of the optimization scheme is verified. It can provide reference for the construction of pedestrian underpass project in the southern city of China.
In order to explore the ventilation environment and reveal the condensation mechanism of I-shaped pedestrian underpass adopted by cities in the rainy and humid regions in south areas of China in summer,on-site monitoring of Yuejiazui pedestrian underpass in Wuhan was carried out,including air temperature,humidity,wall temperature,wind speed,and other parameters. A contrastive analysis was made between CFD numerical simulation and the measured data. Results show that natural ventilation is difficult to achieve in main channel of the Ishaped pedestrian underpass. The underpass is often in state of high humidity and prone to condensation in summer. The reason of condensation phenomenon can be explained by Magnus formula. Different optimization models of I-shaped pedestrian underpass are compared by CFD numerical simulation,and the rationality of the optimization scheme is verified. It can provide reference for the construction of pedestrian underpass project in the southern city of China.
引文
1 CJJ 69-1995,城市人行天桥与人行地道技术规范CJJ 69-1995,Technical specifications of urban pedestrian overcrossing and underpass
2 GB 50038-2005,人民防空地下室设计规范GB 50038-2005.Code for design of air defence basementl
3 GB/T 5701-2008,室内热环境条件GB/T 5701-2008.Thermal environmental conditions for human occupancy
4 GB 50157-2013,地铁设计规范.GB 50157-2013.Code for design of metro.
5杨武杆.西安市地下人行通道内环境研究.西安:西安建筑科技大学,2007Yang W G.Study on the internal environment of underground pedestrian passge in Xi'an.Xi'an:Xi'an University of Architecture and Technology,2007
6王国栋,李安桂,邱少辉.西安市地下人行通道热湿环境测试调查.建筑热能通风空调,2009;28(2):25-28Wang G D,Li A G,Qiu S H.Survey and measurement on indoor environment of underground tunnels in Xi'an.Building Energy&Environment,2009;28(2):25-28
7宁竹之,沈寒放,王登高,等.地下建筑通风措施的空气质量评价与地下环境舒适带探讨.地下空间与工程学报,1986;(1):35-38Ning Z Z,Shen H F,Wang D G,et al.Discussion of Air quality with different ventilation measures and the comfort of the underground environmental.Chinese Journal of Underground Space and Engineering,1986;(1):35-38
8谢东,刘惠,张雪纯,等.衡阳市某地下人行通道热环境数值模拟与实验研究.全国通风技术学术会议,2013Xie D,Liu H,Zhang X C,et al.Numerical simulation and experimental study on the thermal environment of a certain underground pedestrian passageway in Hengyang City.Conference on ventilation technology in China,2013
9 Yuan F D,You S J.CFD simulation and optimization of the ventilation for subway side-platform.Tunnelling&Underground Space Technology,2007;22(4):474-482
10徐琳,张旭.超大断面水平隧道纵向通风临界风速CFD分析.地下空间与工程学报,2007;3(1):124-127Xu L,Zhang X.CFD ana lysis on criticalve locity of longitudinal ventilation for super large horizontal tunnel.Chinese Journal of Underground Space and Engineering,2007;3(1):124-127
11翟波,巩志敏.地下车库诱导风机通风效果数值模拟研究.科学技术与工程,2009;9(7):1766-1771Zhai B,Gong Z M.Numerical simulation research on inducing fan in underground garage.Science Technology and Engineering,2009;9(7):1766-1771
12 Guo X,Zhang Q.Analytical solution,experimental data and CFDsimulation for longitudinal tunnel fire ventilation.Tunnelling&Underground Space Technology,2014;42(5):307-313
13蒋明镜,张望城.一种考虑流体状态方程的土体CFD-DEM耦合数值方法.岩土工程学报,2014;(5):793-801Jiang M J,Zhang W C.Coupled CFD-DEM method for soils incorporating equation of state for liquid.Chinese Journal of Geotechnical Engineering,2014;(5):793-801
14高超,陈梅珊,吴伟亮.地下空间通风优化.科学技术与工程,2015;15(12):265-269Gao C,Chen M S,Wu W L.The optimization of flow field in the underground garage.Science Technology and Engineering,2015;15(12):265-269
15 Diego I,Torno S,Torao J,et al.A practical use of CFD for ventilation of underground works.Tunnelling&Underground Space Technology,2011;26(1):189-200
2 GB 50038-2005,人民防空地下室设计规范GB 50038-2005.Code for design of air defence basementl
3 GB/T 5701-2008,室内热环境条件GB/T 5701-2008.Thermal environmental conditions for human occupancy
4 GB 50157-2013,地铁设计规范.GB 50157-2013.Code for design of metro.
5杨武杆.西安市地下人行通道内环境研究.西安:西安建筑科技大学,2007Yang W G.Study on the internal environment of underground pedestrian passge in Xi'an.Xi'an:Xi'an University of Architecture and Technology,2007
6王国栋,李安桂,邱少辉.西安市地下人行通道热湿环境测试调查.建筑热能通风空调,2009;28(2):25-28Wang G D,Li A G,Qiu S H.Survey and measurement on indoor environment of underground tunnels in Xi'an.Building Energy&Environment,2009;28(2):25-28
7宁竹之,沈寒放,王登高,等.地下建筑通风措施的空气质量评价与地下环境舒适带探讨.地下空间与工程学报,1986;(1):35-38Ning Z Z,Shen H F,Wang D G,et al.Discussion of Air quality with different ventilation measures and the comfort of the underground environmental.Chinese Journal of Underground Space and Engineering,1986;(1):35-38
8谢东,刘惠,张雪纯,等.衡阳市某地下人行通道热环境数值模拟与实验研究.全国通风技术学术会议,2013Xie D,Liu H,Zhang X C,et al.Numerical simulation and experimental study on the thermal environment of a certain underground pedestrian passageway in Hengyang City.Conference on ventilation technology in China,2013
9 Yuan F D,You S J.CFD simulation and optimization of the ventilation for subway side-platform.Tunnelling&Underground Space Technology,2007;22(4):474-482
10徐琳,张旭.超大断面水平隧道纵向通风临界风速CFD分析.地下空间与工程学报,2007;3(1):124-127Xu L,Zhang X.CFD ana lysis on criticalve locity of longitudinal ventilation for super large horizontal tunnel.Chinese Journal of Underground Space and Engineering,2007;3(1):124-127
11翟波,巩志敏.地下车库诱导风机通风效果数值模拟研究.科学技术与工程,2009;9(7):1766-1771Zhai B,Gong Z M.Numerical simulation research on inducing fan in underground garage.Science Technology and Engineering,2009;9(7):1766-1771
12 Guo X,Zhang Q.Analytical solution,experimental data and CFDsimulation for longitudinal tunnel fire ventilation.Tunnelling&Underground Space Technology,2014;42(5):307-313
13蒋明镜,张望城.一种考虑流体状态方程的土体CFD-DEM耦合数值方法.岩土工程学报,2014;(5):793-801Jiang M J,Zhang W C.Coupled CFD-DEM method for soils incorporating equation of state for liquid.Chinese Journal of Geotechnical Engineering,2014;(5):793-801
14高超,陈梅珊,吴伟亮.地下空间通风优化.科学技术与工程,2015;15(12):265-269Gao C,Chen M S,Wu W L.The optimization of flow field in the underground garage.Science Technology and Engineering,2015;15(12):265-269
15 Diego I,Torno S,Torao J,et al.A practical use of CFD for ventilation of underground works.Tunnelling&Underground Space Technology,2011;26(1):189-200