New criteria for assessing local wind environment at pedestrian level based on exceedance probability analysis

被引:34
作者
Bu, Zhen [1 ]
Kato, Shinsuke [2 ]
Ishida, Yoshihiro [2 ]
Huang, Hong [2 ]
机构
[1] Univ Tokyo, Grad Sch Engn, Meguro Ku, Tokyo 1538505, Japan
[2] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan
关键词
Void; Local wind environment; Exceedance probability (EP); Local air change rate (LACR); Local kinetic energy (KE); PURGING FLOW-RATE; GROUND-LEVEL;
D O I
10.1016/j.buildenv.2008.08.002
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In this present study, the wind environment was evaluated for local void domain at pedestrian level in the aspect of ventilation performance and thermal comfort. Exceedance probability analysis was applied as the main approach in order to estimate the uncertainties associated with the influence of climate on wind environment. Two criteria were proposed based on local air change rate and local kinetic energy respectively, which are domain-based indices allowing comprehensive estimation of local wind environment. Calculating output of these criteria in the form of cumulative distribution function forms a ground for reliability analysis of inadequate ventilation or thermal discomfort. A simple street canyon situated in Tokyo, defined as void model, was applied as an illustration of the new criteria in evaluating the local wind environment at ground level. The influences of two configuration factors: orientation and aspect ratio of the void model were investigated by CFD simulation. The results demonstrated that both factors show great influences an local ventilation performance, which also indicated the practicability and effectiveness of the proposed criteria to help achieving good wind environmental design. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1501 / 1508
页数:8
相关论文
共 17 条
[1]   CFD analysis of ventilation efficiency around an elevated highway using visitation frequency and purging flow rate [J].
Huang, Hong ;
Kato, Shinsuke ;
Ooka, Ryozo .
WIND AND STRUCTURES, 2006, 9 (04) :297-313
[2]  
Hunt J.C. R., 1976, BUILD ENVIRON, V11, P15, DOI [DOI 10.1016/0360-1323(76)90015-9, 10.1016/0360-1323(76)90015-9]
[3]   AN INVESTIGATION OF 3-DIMENSIONAL CHARACTERISTICS OF FLOW REGIMES WITHIN THE URBAN CANYON [J].
HUNTER, LJ ;
JOHNSON, GT ;
WATSON, ID .
ATMOSPHERIC ENVIRONMENT PART B-URBAN ATMOSPHERE, 1992, 26 (04) :425-432
[4]  
ISHIDA Y, 2005, P 6 AS PAC C WIND EN, P397
[5]  
ITO K, 2000, J ARCHIT PLANN ENV E, V529, P31
[6]  
*JAP ASS WIND ENG, 2005, BAS KNOWL BUILD WIND
[7]   STUDY ON ACCEPTABLE CRITERIA FOR ASSESSING WIND ENVIRONMENT AT GROUND-LEVEL BASED ON RESIDENTS DIARIES [J].
MURAKAMI, S ;
IWASA, Y ;
MORIKAWA, Y .
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 1986, 24 (01) :1-18
[8]  
MURAKAMI S, 1988, P 10 WIND ENG S, P199
[9]   STUDY ON THE ASSESSMENT OF ENVIRONMENTAL WIND CONDITIONS AT GROUND-LEVEL IN A BUILT-UP AREA - BASED ON LONG-TERM MEASUREMENTS USING PORTABLE 3-CUP ANEMOMETERS [J].
OHBA, M ;
KOBAYASHI, N ;
MURAKAMI, S .
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 1988, 28 (1-3) :129-138
[10]   STREET DESIGN AND URBAN CANOPY LAYER CLIMATE [J].
OKE, TR .
ENERGY AND BUILDINGS, 1988, 11 (1-3) :103-113