热带地理 ›› 2019, Vol. 39 ›› Issue (3): 365-376.doi: 10.13284/j.cnki.rddl.003127
李大全1,孙 武1,欧阳睿康1,黄 盛1,高梦媛1,李庆祥2,黄启明2
收稿日期:
2018-11-11
修回日期:
2019-01-10
出版日期:
2019-05-05
发布日期:
2019-05-05
通讯作者:
孙武(1963―),男,甘肃武威人,教授,主要研究方向为城市风环境,(E-mail)sunw@scnu.edu.cn。
作者简介:
李大全(1993―),男,广西桂林人,硕士研究生,主要从事城市风环境研究,(E-mail)dqli2017@126.com;
基金资助:
国家自然科学基金项目(41771001);广州市科技计划项目(201704020136)
Li Daquan1, Sun Wu1, Ouyang Ruikang1, Huang Sheng1, Gao Mengyuan1, Li Qingxiang2 and Huang Qiming2
Received:
2018-11-11
Revised:
2019-01-10
Online:
2019-05-05
Published:
2019-05-05
摘要:
分别构建广州主建成区垂直比例尺为1﹕2 000、1﹕1 000和1﹕500的3个建筑物模型,利用大型边界层风洞,在西北和东南两风向下,基于中性流模拟分析了复杂城市地形下湍流度随高度的变化及其对宏观地形的依赖。结果表明:风廓线指数α与不同高度的湍流度之间的关系密切,利用现有模型,根据4类粗糙度边界层和不同垂直比例尺,可确定相应的湍流度随高度变化模型的主要系数,预测精度高。城市地形下最大湍流度面发育在0~0.2 h之间狭窄的范围内。用湍流度形态指数β来表征湍流度随高度的变化,无论城市屋脊还是平坦地形,随着风程区的延伸,廓线的指数α升高,湍流度形态指数β降低。表明同一高度湍流度值具有由迎风区、丘顶区向背风区增高,沿风程逐渐增大的规律,对地形部位和风程的依赖性强,与来流翻越简单地形时的特征一致。
李大全,孙武,欧阳睿康,黄盛,高梦媛,李庆祥,黄启明. 湍流度随高度的变化及其对城市宏观地形的依赖[J]. 热带地理, 2019, 39(3): 365-376.
Li Daquan, Sun Wu, Ouyang Ruikang, Huang Sheng, Gao Mengyuan, Li Qingxiang and Huang Qiming. Variation in Turbulence Degree with Height and its Dependence on Urban Macroscopic Topography[J]. TROPICAL GEOGRAPHY, 2019, 39(3): 365-376.
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