...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Building and Environment >Wind weakening in a dense high-rise city due to over nearly five decades of urbanization
【24h】

Wind weakening in a dense high-rise city due to over nearly five decades of urbanization

机译：由于近五十年的城市化，高密度高层城市的风力减弱

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Decades of urbanization can lead to significant wind reduction in urban areas. At the King's Park meteorological station in the heart of the Kowloon Peninsula Hong Kong, a wind speed reduction of 0.6 m/s per decade was observed from 1968 to 1995, and -0.16 m/s per decade from 1996 to 2017. We obtained data on the changing three-dimensional urban morphology of Kowloon during the period of 1964-2010, and conducted computational fluid dynamics simulations on historical wind environment considering the prevailing winds. The wind speed and its loss were calculated as both intrinsic and comprehensive spatial averages within an elevation of 200 m. The results show that the overall mean wind speed in the studied urban areas gradually decreased due to the continuous urban development and elevation in building height. The total wind loss ratios at three representative locations have increased from less than 10% to greater than 20% during the study period. The total wind loss ratio may increase to about 40% by 2050 if the current weakening trend continues. The average wind speed at pedestrian level has significantly declined, and local acceleration of wind was only observed in some local areas. However, such accelerated airflow is only maintained around a few blocks of buildings. Our study demonstrates the impact of urbanization on the wind weakening in Hong Kong and reveals the importance and need of factoring in urban air ventilation into the design of urban morphology.
机译：数十年的城市化进程可能导致城市地区的大风量减少。在香港九龙半岛中心的国王公园气象站，从1968年至1995年，风速每十年降低0.6 m / s，从1996年至2017年，风速每十年降低-0.16 m / s。我们获得了数据研究了1964-2010年期间九龙城市三维形态的变化，并考虑了盛行风对历史风环境进行了计算流体动力学模拟。风速及其损失计算为200 m海拔内的内在和综合空间平均值。结果表明，由于城市的持续发展和建筑物高度的升高，研究城市的总体平均风速逐渐降低。在研究期间，三个代表性地点的总风损率已从小于10％增至大于20％。如果当前的减弱趋势持续下去，到2050年，总风损率可能会增加到40％左右。行人水平的平均风速已大大降低，并且仅在某些局部地区观察到局部风速加速。但是，这种加速的气流只能维持在几座建筑物周围。我们的研究表明了城市化对香港风向减弱的影响，并揭示了在城市形态设计中考虑城市空气流通的重要性和必要性。

著录项

  • 来源
    《Building and Environment》 |2018年第6期|207-220|共14页
  • 作者

    Peng Lei; Liu Jia-Ping; Wang Yi; Chan Pak-wai; Lee Tsz-cheung; Peng Fen; Wong Man-Sing; Li Yuguo;

  • 作者单位

    Univ Hong Kong, Dept Mech Engn, Pokfulam, Hong Kong, Peoples R China;

    Xian Univ Architecture & Technol, Coll Architecture, Xian, Shaanxi, Peoples R China;

    Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian, Shaanxi, Peoples R China;

    Hong Kong Observ, Hong Kong, Hong Kong, Peoples R China;

    Hong Kong Observ, Hong Kong, Hong Kong, Peoples R China;

    Changsha Univ Sci & Technol, Changsha, Hunan, Peoples R China;

    Hong Kong Polytech Univ, Dept Land Surveying & Geoinformat, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Mech Engn, Pokfulam, Hong Kong, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Wind loss; Wind weakening; CFD; Urban environment; Hong Kong;

    机译：风损失;风减弱;差价合约;城市环境;香港;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号