New European Wind Atlas: The Østerild balconies experiment
New European Wind Atlas: The Østerild balconies experiment
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新欧洲风图集：Østerild 阳台实验
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
N. Vasiljević
中科院分区：
文献类型：
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作者：
Ioanna Karagali;J. Mann;E. Dellwik;N. Vasiljević
新欧洲风地图集（NEWA）项目的主要目标之一是开展高时空分辨率的大规模野外实验，并对现有的实验数据库进行重大升级。Østerild阳台实验旨在收集相对平坦和半森林地形的测量数据，以量化各种地形特征对平均风场的影响。实验于2016年4月至8月在丹麦北部的Østerild大型风力涡轮机试验站进行。试验场的两座250米高的气象塔配备了阳台，首先在当地地面以上50米，后来上升到200米。扫描激光雷达被放置在每个阳台上，根据进入的风向进行90°弧形的东或西方向的水平扫描。本研究的目的是描述i)应用于数据的新滤波方法，ii)风场重建，以及iii)利用导出的风场来检查地表非均质性对平均风流的影响。利用航空激光雷达扫描的云点数据，精确地推导出地形和树木高度。地表以上50 m高度的平均风型受地形特征的影响较大。
One of the main objectives of the New European Wind Atlas (NEWA) project is to carry out large scale field experiments at a high spatial and temporal resolution, and provide a significant upgrade to the experimental databases currently available. The Østerild balconies experiment aimed at collecting measurements over a relatively flat and semi-forested terrain to quantify the effect of various terrain features on the mean wind field. The experiment was performed at the Østerild test station for large wind turbines in Northern Denmark, from April to August 2016. The two 250 m meteorological towers available at the test site were equipped with balconies, first at 50 m above local ground level, later raised to 200 m. Scanning lidars were placed on each of the balconies, performing horizontal scans over 90° arcs with an east or west orientation depending on the incoming wind direction. The purpose of this study is to describe i) the new filtering method applied to the data, ii) the wind field reconstruction and the iii) utilisation of the derived wind fields to examine the imprint of surface heterogeneity on the mean wind flow. Cloud point data from aerial lidar scans were used to accurately derive the terrain and tree height. The mean wind flow patterns appeared to be heavily influenced by the terrain characteristics at the height of 50 m above ground level.