DOI: 10.1016/j.atmosenv.2015.01.067
Scopus记录号: 2-s2.0-84922678959
论文题名: Field and wind tunnel modeling of an idealized street canyon flow
作者: Blackman K ; , Perret L ; , Savory E ; , Piquet T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 106 起始页码: 139
结束页码: 153
语种: 英语
英文关键词: Boundary layer
; Field experiment
; Particle image velocimetry
; Street canyon
; Wind tunnel
Scopus关键词: Atmospheric thermodynamics
; Boundary layers
; Turbulence
; Velocity measurement
; Wind
; Field experiment
; Low-frequency motion
; Particle image velocimetries
; Spatial correlations
; Street canyon
; Turbulence statistics
; Two-point correlation
; Wind tunnel modeling
; Wind tunnels
; boundary layer
; flow field
; flow modeling
; numerical model
; street canyon
; turbulence
; wind direction
; wind tunnel
; accuracy
; Article
; boundary layer
; correlation coefficient
; dynamics
; measurement
; model
; motion
; priority journal
; reproducibility
; turbulent flow
; velocity
; wind
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The present work examines the flow field in a simple street canyon that has been modeled at full-scale and at 1:200 scale in a wind tunnel. It relies on the detailed analysis of statistics of both flows including two-point correlation coefficients, an approach not commonly done for canyon flows. Comparison between the field and wind tunnel study has demonstrated good agreement for the mean velocity and turbulence statistics, which are typically within 20%. However, significant differences in the along-canyon mean and turbulent components have been observed and are shown to be a result of the changing of the ambient wind direction and low frequency motion present in the field. As the wind direction changes over time the result is a channeling of flow along the canyon axis. This phenomenon cannot be accurately reproduced by the wind tunnel model, which produces nominally 2D flow. The turbulence dynamics were investigated through two-point spatial correlation of the streamwise, spanwise and vertical components, which show agreement to within 15-30% between the field and wind tunnel results. From estimation of boundary layer log-law parameters it has been shown that using a single point reference velocity measurement at 10m height to estimate the boundary layer log-law parameters is unreliable in the present case. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81911
Appears in Collections: 气候变化事实与影响
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作者单位: University of Western Ontario, London, ON, Canada; LUNAM Université, Ecole Centrale de Nantes, LHEEA UMR CNRS, Nantes, France; Institut de Recherche en Sciences et Techniques de la Ville (IRSTV), FR CNRS, Nantes, France
Recommended Citation:
Blackman K,, Perret L,, Savory E,et al. Field and wind tunnel modeling of an idealized street canyon flow[J]. Atmospheric Environment,2015-01-01,106