文献类型：期刊文献

英文题名：3D real-time volumetric particle tracking velocimetry ? A promising tool for studies of airflow around high-rise buildings

作者：Zhao, Yu[1];Ma, Xiaojun[2];Zhang, Chengbin[1];Wang, Haoyu[2];Zhang, Yuanhui[1]

第一作者：Zhao, Yu

通讯作者：Zhang, YH[1]

机构：[1]Univ Illinois, Dept Agr & Biol Engn, Urbana, IL 61801 USA;[2]Beijing Union Univ, Coll Biochem Engn, Beijing, Peoples R China

第一机构：Univ Illinois, Dept Agr & Biol Engn, Urbana, IL 61801 USA

通讯机构：[1]corresponding author), Univ Illinois, Dept Agr & Biol Engn, Urbana, IL 61801 USA.

年份：2020

卷号：178

外文期刊名：BUILDING AND ENVIRONMENT

收录：;EI(收录号：20202008649788);Scopus(收录号：2-s2.0-85084410445);WOS:【SCI-EXPANDED(收录号:WOS:000540970400007)】；

基金：The authors acknowledge the support from National Natural Science Foundation of China (Grant No. 51578065) and National Natural Science Foundation of Beijing (Grant No. 8182019) to Dr. Xiaojun Ma and Dr. Haoyu Wang respectively, to allow their collaboration and visiting abroad.

语种：英文

外文关键词：Anemometers - Computational fluid dynamics - Turbulent flow - Velocimeters - Velocity measurement - Wind tunnels

摘要：Airflow patterns around high-rise buildings affect building wind environment (BWE) including infiltration/exfiltration, heating/cooling loads and internal environment. Scaled high-rise building models are usually placed in a wind tunnel to study BWE. However, measuring 3D flow patterns around scaled high-rise buildings in real-time is a challenge. In this study, a 3D real-time Volumetric Particle Tracking Velocimetry (VPTV) system was used to measure the airflows around three different scaled-building setups: single building, double building parallel to the wind, and double building perpendicular to the wind. Trajectories in Lagrangian coordinates system were tracked and then interpolated to generate 3D Eulerian description of the flow field. In this study, the relative errors of velocities measured by VPTV were smaller than 2% for magnitudes range from 0.025 m/s to 2.2 m/s. The local velocity magnitudes measured by hot-wire anemometer and CFD at selected positions were compared with VPTV measurement with relative error 26.2% and 16.3% respectively. Finally, measured streamlines and reattachment lengths were compared with CFD simulation at selected plane. Results show that the VPTV system is capable of capturing detailed and accurate data of airflow around scaled high-rise building models. ? 2020 Elsevier Ltd