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Wind speed measurements at up to 500m altitude using Doppler sodars and effects of terrain roughness on wind speed profiles

使用多普勒声雷达在高达 500m 高度测量风速以及地形粗糙度对风速剖面的影响

基本信息

批准号：
10450207
负责人：
TAMURA Yukio
金额：
$ 3.9万
依托单位：
TOKYO INSTITUTE OF POLYTECHNICS
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

Wind speed measurements using two or three sets of Doppler sodars were conducted with different combinations at various sites : Minami-Machida (a suburban residential area), Hiratsuka City (a low-rise urban area), Takahamadai (a sea shore), Odaiba (a bay area), Etchujima (an urban area), Minamisenju (a high density residential area) and Atsugi (a middle-rise urban area). Methods of measuring mean wind speed profiles and turbulence intensities, height correction methods and noise effect evaluations were examined in detail to improve measurement accuracy.Various important results were obtained on atmospheric boundary layer winds developed over ground with different terrain roughnesses at up to 500m altitude.Physical model studies were also conducted using two different wind tunnels. Two ground roughness models were made that geometrically simulated buildings in the range of 8km between Takahamadai and Hiratsuka City, and 12km between Odaiba , Etchujima and Minamisenju. Development of the model scale atmospheric boundary layers for fetches simulated in the wind tunnels were examined and compared with full-scale results.Numerical simulations using the k-ε model coded by Maruyama were also conducted using the digital database of buildings on the ground between Takahamadai and Hiratsuka City, and between Odaiba, Etchujima and Minamisenju. The spatial distributions of the mean wind speed and turbulence intensities were calculated and compared with the wind tunnel experiments and full-scale data.Three years of comprehensive studies of atmospheric boundary layer winds using Doppler sodars at seven different sites of up to 500m altitude, wind tunnel studies and numerical simulations provided new knowledge and information that was useful for the accurate evaluation of the design wind speed for various terrain categories.

使用两套或三套多普勒声雷达在不同的地点进行了风速测量：南町田（郊区住宅区），平冢市（低层城市地区），高滨台（海海岸），台场（海湾地区），越中岛（城市地区），南千州（高密度住宅区）和厚木（中层城市地区）。为了提高测量精度，对平均风速廓线和湍流强度的测量方法、高度修正方法和噪声影响评价等进行了详细的研究，获得了500米以下不同地形粗糙度地面上发展的大气边界层风的各种重要结果，并在两个不同的风洞中进行了物理模型研究。制作了两个地面粗糙度模型，几何模拟了高滨台和平冢市之间8 km范围内的建筑物，以及台场、越中岛和南千州之间12 km范围内的建筑物。在风洞中模拟了大气边界层的发展，并与全尺寸结果进行了比较。利用高滨台和平冢市之间以及台场、越中岛和南千州之间的地面建筑物数字数据库，使用Maruyama编写的k-ε模型进行了数值模拟。计算了平均风速和湍流强度的空间分布，并与风洞试验和全尺寸试验资料进行了比较。利用多普勒声雷达在海拔500米以下的7个不同地点对大气边界层风场进行了为期3年的综合研究，风洞研究和数值模拟提供了新的知识和信息，这些知识和信息对于准确评估设计风速是有用的，各种地形类别。