城市街谷与上游阻挡建筑最不利间距的研究

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Abstract

Numerical simulations were conducted to investigate the influence of the distance between the upstream building and the downstream building in street canyons (D) on characteristics of air flow and distributions of gaseous pollutants in the canyons. The simulation results showed that the wind velocities in the windward regions in the canyons did not change with the change of D. However, the wind velocities in the leeward and central regions decreased first and then increased with the increase of D, and the minimum value occurred when D=90m. Correspondingly, the peak concentration of the pollutant in the canyons appeared at the same D, which indicated the most unfavorable value of D existed. In urban planning, it should be avoided as far as possible. When D was more than 90m, the larger the D was, the lower the pollutant concentration would be. When D was less than 90m, the smaller the D was, the lower the concentration would be, which could be benefit for both land-saving and traffic pollution reduction.

Key words： street canyon upstream building traffic pollutant distance CFD

Received: 28 March 2019

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X51

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	Articles by authors
	ZHOU Hua-yuan
	KANG Yan-ming
	YANG Fang
	LIU Gai-ling
	ZHONG Ke

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ZHOU Hua-yuan,KANG Yan-ming,YANG Fang等. Studies on the most unfavorable distance between the upstream building and the windward building in street canyons in urban area[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(10): 4125-4132.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I10/4125

[1]	申俊.PM2.5污染对公共健康和社会经济的影响研究[D]. 武汉:中国地质大学, 2018. Shen J. Research on Public Health and Socio-economic Impacts of PM2.5 Pollution[D]. Wuhan:China University of Geosciences, 2018.
[2]	Hunter L J, Watson I D, Johnson G T. Modelling air flow regimes in urban canyons[J]. Energy and Buildings, 1991,15(3):315-324.
[3]	董龙翔,左洪超,杨宾,等.边界入流风场扰动对模拟城市大气扩散的影响[J]. 中国环境科学, 2017,37(9):3210-3219. Dong L X, Zuo H C, Yang B. Influence of boundary inflow wind fluctuation on simulated urban atmospheric diffusion[J]. China Environmental Science, 2017,37(9):3210-3219
[4]	王乐,张云伟,顾兆林.动态风场及交通流量下街道峡谷内污染物扩散模拟[J]. 中国环境科学, 2012,32(12):2161-2167. Wang L, Zhang Y W, Gu Z L. The numerical simulation of pollutant dispersion in street canyons under dynamic wind field and traffic flux conditions[J]. China Environmental Science, 2012,32(12):2161-2167
[5]	杨方,钟珂,亢燕铭.街道峡谷对称性对污染物扩散的影响[J]. 中国环境科学, 2015,35(3):706-713. Yang F, Zhong K, Kang Y M. Effects of street geometric configurations on the pollutant dispersion around the canyons[J]. China Environmental Science, 2015,35(3):706-713.
[6]	Carpentieri M, Robins A G. Influence of urban morphology on air flow over building arrays[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2015,145:61-74.
[7]	Yang F, Gao Y, Zhong K, et al. Impacts of cross-ventilation on the air quality in street canyons with different building arrangements[J]. Building and Environment, 2016,104:1-12.
[8]	Ai Z T, Mak C M. CFD simulation of flow in a long street canyon under a perpendicular wind direction:Evaluation of three computational settings[J]. Building and Environment, 2017,114:293-306.
[9]	Di Bernardino A, Monti P, Leuzzi G, et al. Pollutant fluxes in two-dimensional street canyons[J]. Urban climate, 2018,24:80-93.
[10]	Zhang K, Chen G, Wang X, et al. Numerical evaluations of urban design technique to reduce vehicular personal intake fraction in deep street canyons[J]. Science of the Total Environment, 2019,653:968-994.
[11]	Ng W Y, Chau C K. Evaluating the role of vegetation on the ventilation performance in isolated deep street canyons[J]. International Journal of Environment and Pollution, 2012,50(1-4):98-110.
[12]	冯寒立,赵敬德,翟静.高架覆盖的街谷内可吸入颗粒物的浓度分布[J]. 环境工程学报, 2017,11(8):4669-4676. Feng H L, Zhao J D, Zhai J. Concentration diffusion of particulate matter in street canyon covered with elevated road[J]. Chinese Journal of Environmental Engineering, 2017,11(8):4669-4676.
[13]	钟珂,亢燕铭,王翠萍,等.城市绿化对街道空气污染物扩散的影响[J]. 中国环境科学, 2005,25(S1):6-9. Zhong K, Kang Y M, Wang C P, et al. Influence of afforestation of cities on urban road air pollutants diffusion[J]. China Environmental Science, 2005,25(S1):6-9.
[14]	王友君,亢燕铭,陈勇航.建筑和绿化对街谷空气污染物扩散的影响[J]. 东华大学学报(自然科学版), 2012,38(6):740-744,770. Wang Y J, Kang Y M, Chen Y H. Influence of buildings and tree planting on air pollutants diffusion in street canyon[J]. Journal of Donghua University (Natural Science), 2012,38(6):740-744,770.
[15]	Huang Y, Zhou Z A. numerical study of airflow and pollutant dispersion inside an urban street canyon containing an elevated expressway[J]. Environmental Modeling & Assessment, 2013,18(1):105-114.
[16]	Gu Z L, Zhang Y W, Lei K B. Large eddy simulation of flow in a street canyon with tree planting under various atmospheric instability conditions[J]. Science China Technological Sciences, 2010,53(7):1928-1937.
[17]	朱强,亢燕铭,杨方,等.上游建筑对街道峡谷内流场和污染物分布特征的影响[J]. 中国环境科学, 2015,35(1):45-54. Zhu Q, Kang Y M, Yang F, et al. Impacts of upstream buildings on the flow fields and pollutant distributions in street canyons[J]. China Environmental Science, 2015,35(1):45-54.
[18]	Yim S H L, Fung J C H, Lau A K H, et al. Air ventilation impacts of the "wall effect" resulting from the alignment of high-rise buildings[J]. Atmospheric Environment, 2009,43(32):4982-4994.
[19]	刘改玲,陈晓萌,钟珂.背景风速对上游有阻挡建筑的街谷环境的影响[J]. 建筑热能通风空调, 2017,36(6):39-43. Liu G L, Chen X M, Zhong K. Impacts of background wind speed on the flow fields and pollutant distributions in street canyons[J]. Building Energy & Environment, 2017,36(6):39-43.
[20]	Li X X, Leung D Y C, Liu C H, et al. Physical modeling of flow field inside urban street canyons[J]. Journal of Applied Meteorology and Climatology, 2008,47(7):2058-2067.
[21]	Liu C H, Barth M C, Leung D Y C. Large-eddy simulation of flow and pollutant transport in street canyons of different building-height-to-street-width ratios[J]. Journal of Applied Meteorology, 2004,43(10):1410-1424.
[22]	Li X X, Liu C H, Leung D Y C. Development of a .-. model for the determination of air exchange rates for street canyons[J]. Atmospheric Environment, 2005,39(38):7285-7296.
[23]	Meroney R N, Pavageau M, Rafailidis S, et al. Study of line source characteristics for 2-D physical modelling of pollutant dispersion in street canyons[J]. Journal of wind Engineering and industrial Aerodynamics, 1996,62(1):37-56.
[24]	Liu C H, Wong C C C. On the pollutant removal, dispersion, and entrainment over two-dimensional idealized street canyons[J]. Atmospheric research, 2014,135:128-142.
[25]	Chen L, Hang J, Sandberg M, et al. The impacts of building height variations and building packing densities on flow adjustment and city breathability in idealized urban models[J]. Building and Environment, 2017,118:344-361.
[26]	王福军.计算流体动力学分析——CFD软件原理与应用[M]. 北京:清华大学出版社, 2004. Wang F J. Computational fluid dynamics analysis-CFD software principles and applications[M]. Beijing:Tsinghua University Press, 2004.
[27]	陶文铨.数值传热学(第2版)[M]. 西安:西安交通大学出版社, 2001. Tao W Q. Numerical Heat Transfer (Second Edition)[M]. Xi'an:Xi'an Jiaotong University Press, 2001.
[28]	杨方.街区与建筑室内空气环境耦合特征的研究[D]. 上海:东华大学, 2015. Yang F. Investigations on the coupling exchange between outdoor wind flow in street canyon and indoor air flow inside buildings[D]. Shanghai:Donghua University, 2015.
[29]	Wang Y, Zhong K, Zhang N, et al. Numerical analysis of solar radiation effects on flow patterns in street canyons[J]. Engineering Applications of Computational Fluid Mechanics, 2014,8(2):252-262.
[30]	Vardoulakis S, Fisher B E A, Pericleous K, et al. Modelling air quality in street canyons:a review[J]. Atmospheric Environment, 2003,37(2):155-182.
[31]	Leung K K, Liu C H, Wong C C C, et al. On the study of ventilation and pollutant removal over idealized two-dimensional urban street canyons[C]//Building Simulation. Tsinghua Press, 2012,5(4):359-369.
[32]	Barratt R. Atmospheric Dispersion Modelling-An Introduction to Practical Applications[M]. London:Earthscan Publication, 2001.
[33]	Chang C H, Meroney R N. Numerical and physical modeling of bluff body flow and dispersion in urban street canyons[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2001,89(14/15):1325-1334.