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高密度城市气候与城市环境气象研究

发布人：网站管理员 发布日期：2021-02-02

建筑形态、气象条件、光化学反应和绿化参数是影响微尺度城市(~100m- 1km)湍流、污染物扩散与热环境特征的重要因子。建筑形态参数包括建筑密度、街道高宽比(H/W)、天空视域因子、建筑热容和表面颜色、排列方式和高低变化等。气象参数包括太阳辐射(纬度、季节)和天气(晴朗、云层)、风速风向和温度层结(不稳定、中性、稳定甚至逆温)等。野外站副站长杭建教授团队在上述研究领域本年度取得重要科研成果：

（1）总结并改进街区绿化的多孔介质数值模型，在实验数据的验证下，提高CFD数值模拟准确性，进行了城市绿化环境效应与NOx-O3光化学反应影响城市空气污染与人群暴露的若干数值模拟研究。

（2）完成理想二维街谷模型中街道绿化、高宽比、建筑储热能力影响城市风热环境的SOMUCH缩尺尺度外场实验研究。

城市街道绿化可降低城市噪音和美化环境，并提供遮阴和蒸发冷却降温作用，是改善城市夏季室外热舒适性的重要手段，也是应对全球变暖和城市热岛的关键自适应策略之一。然而当热力因素重要时，城市建筑几何布局、城市绿化种类、城市绿化布局等参数可控的高质量参数化实验研究困难，各参数的相对重要性和非线性热力影响机理仍未完全明确。如图9，本实验于广州郊区构建了热惯性足够大、建筑储热项易测、建筑形态和绿化参数可控可调的缩尺尺度二维街谷模型(高H = 1.2m，长L = 12m)，并针对中、高建筑密度(H/W ≥ 1)模型，进行了有效的参数化缩尺尺度外场实验，致力于研究典型真实气象条件下街道高宽比（AR = H/W = 1, 2, 3）和城市绿化等对非稳态城市湍流和热环境时空特征的影响机理。上述研究发表SCI论文13篇，通讯作者为杭建教授。

 

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图9 城市绿化的缩尺尺度外场实验模型示意图

已发表的相关论文：

  1. Hongyu Yang#, Cho Kwong Charlie Lam#, Yuanyuan Lin, Lan Chen, Magnus Mattsson, Mats Sandberg, Abolfazl Hayati, Leif Claesson, Jian Hang* （通讯作者）. Numerical investigations of Re-independence and influence of wall heating on flow characteristics and ventilation in full-scale 2D street canyons. Building and Environment, 2020, Dec. (accepted).
  2. Lan Chen, Jian Hang, Guanwen Chen, Shanhe Liu, Yuanyuan Lin, Magnus Mattsson, Mats Sandberg, Hong Ling*. Numerical investigations of wind and thermal environment in 2D scaled street canyons with various aspect ratios and solar wall heating. Building and Environment, 2020, Dec. (accepted).
  3. Taihan Chen, Hongyu Yang, Guanwen Chen, Cho Kwong Charlie Lam, Jian Hang*(通讯作者), Xuemei Wang, Yonglin Liu, Hong Ling. Integrated impacts of tree planting and street aspect ratios on urban thermal environment in street canyons: A scaled outdoor experiment. Science of the Total Environment. 2020，已接收，即将发表。
  4. Jiarui Liu（学生第一作者）, Shuhang Cui, Guanwen Chen, Yong Zhang, Xuemei Wang, Qun Wang, Peng Gao, Jian Hang*(通讯作者). The influence of solar natural heating and NOx-O3 photochemistry on flow and reactive pollutant exposure in 2D street canyons. Science of the Total Environment, 2020 已在线发表。
  5. Guanwen Chen（学生第一作者）, Xia Yang, Hongyu Yang, Jian Hang*(通讯作者), Yuanyuan Lin, Xuemei Wang, Qun Wang, Yonglin Liu. The influence of aspect ratios and solar heating on flow and ventilation in 2D street canyons by scaled outdoor experiments. Building and Environment 2020.  已在线发表。
  6. Yong Zhang(学生为第一作者), Cuiyun Ou, Lan Chen, Luolin Wu, Jiarui Liu, Xuemei Wang, Hualiang Lin, Peng Gao, Jian Hang*(通讯作者). Numerical studies of passive and reactive pollutant dispersion in high-density urban models with various building densities and height variations. Building and Environment 2020, 169: 106569。
  7. Xia Yang（学生为第一作者）, Cuiyun Ou, Hongyu Yang, Li Liu, Hualiang Lin, Tie Song, Jian Hang*(通讯作者). Transmission of pathogen-laden expiratory droplets in a coach bus.  Journal of Hazardous Materials 2020, 397: 122609。
  8. Guanwen Chen(学生为第一作者), Dongyang Wang, Qun Wang, Yuguo Li, Xuemei Wang, Jian Hang*(通讯作者), Peng Gao, Cuiyun Ou, Kai Wang. Scaled outdoor experimental studies of urban thermal environment in street canyon models with various aspect ratios and thermal storage. Science of the Total Environment 2020, 726: 138147。
  9. Jian Hang, Xieyuan Chen, Guanwen Chen, Taihan Chen, Yuanyuan Lin, Zhiwen Luo, Xuelin Zhang*, Qun Wang*. The influence of aspect ratios and wall heating conditions on flow and passive pollutant exposure in 2D typical street canyons. Building and Environment, 2020, 168: 106536.
  10. Hongyu Yang(学生为第一作者), Taihan Chen, Yuanyuan Lin, Riccardo Buccolieri, Magnus Mattsson, Ming Zhang, Jian Hang*（通讯作者）, Qun Wang. Integrated impacts of tree planting and street aspect ratios on CO dispersion and personal exposure in full-scale street canyons. Building and Environment, 2020, 169: 106529.
  11. Keer Zhang(学生为第一作者),Guanwen Chen, Yong Zhang, Shanhe Liu, Xuemei Wang, Baoming Wang, Jian Hang*（通讯作者）. Integrated impacts of turbulent mixing and NOX-O3 photochemistry on reactive pollutant dispersion and intake fraction in shallow and deep street canyons. Science of the Total Environment, 2020, 712: 135553.
  12. Xia Yang(学生为第一作者), Yong Zhang, Jian Hang*（通讯作者）, Yuanyuan Lin, Magnus Mattsson, Ming Zhang, Mats Sandberg, Kai Wang. Integrated assessment of indoor and outdoor ventilation in street canyons with naturally-ventilated buildings by various ventilation indexes. Building and Environment, 2020, 169: 106528.
  13. Yong Zhang(学生为第一作者), Xia Yang, Hongyu Yang, Keer Zhang, Xuemei Wang, Zhiwen Luo, Jian Hang*（通讯作者）, Shengzhen Zhou. Numerical investigations of reactive pollutant dispersion and personal exposure in 3D urban-like models. Building and Environment, 2020, 169: 106569.
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