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Variation of leading-edge-erosion relevant precipitation parameters with location and weather type
Meteorologische Zeitschrift ( IF 1.2 ) Pub Date : 2021-07-08 , DOI: 10.1127/metz/2021/1063
Anna-Maria Tilg , Martin Hagen , Flemming Vejen , Charlotte Bay Hasager

Precipitation is a key driver of leading-edge erosion of wind turbine blades, which leads to a loss in annual energy production and high cost for repair of wind turbines. Precipitation type, drop size and their frequency are relevant parameters, but not easily available. Reflectivity-Rain Rate (Z‑R) relationships as well as annual sums of rainfall amount and rainfall kinetic energy potentially could be used to estimate leading-edge erosion. Although Z‑R relationships and amounts are known for several places, their spatial variation and dependence on weather types is unknown in the North Sea and Baltic Sea area. We analysed time series of multiple disdrometers located on the coast of the North Sea and Baltic Sea to characterize the variation and weather-type dependence of the Z‑R relationship, precipitation type, rainfall amount and kinetic energy.The Z‑R relationship as indication for the mean drop-size distribution showed small variations within different locations, but had a large variability for specific, but rare weather types. Only the precipitation types snow and hail showed some tendencies of weather-type dependence. Rainfall amount and rainfall kinetic energy were higher for stations in the eastern part of the North Sea compared to the western part and the Baltic Sea. Highest values were related to advection from the West. Overall, variations with location and weather type were found. These results will need to be considered in leading-edge erosion modelling and site assessment.

中文翻译:

前缘侵蚀相关降水参数随位置和天气类型的变化

降水是风力涡轮机叶片前缘侵蚀的关键驱动因素,这会导致年发电量损失和风力涡轮机维修成本高。降水类型、液滴大小及其频率是相关参数,但不容易获得。反射率-降雨率 (Z-R) 关系以及降雨量和降雨动能的年总和可能用于估计前缘侵蚀。尽管 Z-R 关系和数量在多个地方已知,但在北海和波罗的海地区,它们的空间变化和对天气类型的依赖性未知。我们分析了位于北海和波罗的海沿岸的多个偏差计的时间序列,以表征 Z-R 关系、降水类型、降雨量和动能的变化和天气类型依赖性。作为平均水滴大小分布指示的 Z-R 关系在不同位置显示出很小的变化,但对于特定但罕见的天气类型有很大的变化。只有降水类型雪和冰雹表现出一些天气类型依赖的趋势。与西部和波罗的海相比,北海东部站点的降雨量和降雨动能更高。最高值与来自西方的平流有关。总体而言,发现了位置和天气类型的变化。在前沿侵蚀建模和场地评估中需要考虑这些结果。只有降水类型雪和冰雹表现出一些天气类型依赖的趋势。北海东部站点的降雨量和降雨动能高于西部和波罗的海站点。最高值与来自西方的平流有关。总体而言,发现了位置和天气类型的变化。在前沿侵蚀建模和场地评估中需要考虑这些结果。只有降水类型雪和冰雹表现出一些天气类型依赖的趋势。北海东部站点的降雨量和降雨动能高于西部和波罗的海站点。最高值与来自西方的平流有关。总体而言,发现了位置和天气类型的变化。在前沿侵蚀建模和场地评估中需要考虑这些结果。
更新日期:2021-07-08
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