Improving Understanding and Parameterisation of the Marine Atmospheric Boundary Layer (MABL) in Near Coastal Regions

英国在安装海上风电场方面处于世界领先地位。然而，与陆上相比，我们对近海风况的了解有限，这主要是因为缺乏近海测量。海上风力涡轮机的性能和寿命在很大程度上取决于机器运行的风力条件。这项研究的目的是为了更好地了解近海风电场建设频繁的近海地区的海洋大气边界层(MABL)。目前对大气边界层(ABL)的了解主要来自平坦均匀地形上的陆基观测。这些观察结果导致了类似Monin和Obukhov(MO)的相似关系的发展。很明显，MO相似尺度可能不适合于近海应用，特别是在具有陆地/海洋流动和显著热层结时期的非均匀情况下。更好地了解MABL的关键是详细的气象测量。这样的测量很少，尽管海上风电行业已经开始部署一些海上桅杆和固定/浮动激光雷达设备。来自这类设施的数据通常在商业上是敏感的，很难获取。离岸可再生能源弹射器最近安装了Narec离岸风速测量中心(NOAH)气象桅杆，距离诺森伯兰布莱斯附近海岸6公里。这提供了高达海平面104米的多个高度的气象测量。该桅杆为研究和商业测试提供风资源和环境数据。此外，沿海激光雷达提供了高达170米的剖面，适合于研究陆地/海洋过渡。研究学生将使用这些数据来研究当地的MABL。学生将把统计数据分析和数值模拟方法结合起来，包括中尺度和计算流体动力学(CFD)程序，以更好地了解大气层圈，并发展更适合近海地区(100公里)的新的尺度关系。这个项目有可能在更好地了解海上风电场的运行环境方面产生实际影响。该学生将在可再生能源系统技术中心(CREST)工作。该奖学金是与布莱斯的离岸可再生能源弹射器一起获得的科学与工程合作奖(CASE)。

The UK leads the world in terms of the installation of offshore wind farms. However, our understanding of the wind conditions offshore is limited compared with onshore, mainly due to the lack of offshore measurements. The performance and longevity of offshore wind turbines very much depends on the wind conditions in which the machines operate. This research aims to provide a better understanding of the marine atmospheric boundary layer (MABL) in near coastal regions where offshore wind farms are frequently constructed. Present understanding of the atmospheric boundary layer (ABL) comes primarily from land based observations in flat homogeneous terrain. These observations have led to the development of similarity relationships such as that by Monin and Obukhov (MO). It is becoming apparent that MO similarity scaling may not be appropriate for offshore applications, particularly in non-homogeneous situations with land/sea flows and periods of significant thermal stratification. Key to a better understanding of the MABL are detailed meteorological measurements. Such measurements are scarce, though a number of offshore masts and fixed/floating LiDAR devices have started to be deployed by the offshore wind power industry. Data from such installations are generally commercially sensitive and difficult to access. The Offshore Renewable Energy Catapult recently installed the Narec Offshore Anemometry Hub (NOAH) meteorological mast 6km from the coast near Blyth, Northumberland. This provides meteorological measurements at multiple heights up to 104m above the sea surface. This mast provides wind resource and environmental data for research and commercial testing. In addition, a coastal LiDAR provides profiles up to 170m, appropriate for studying the land/sea transition. The research student will use the data to study the local MABL. This will be supplemented by additional remote sensing data, e.g. satellite as well as operational forecast and reanalysis datasets.The student will combine statistical data analysis with numerical modelling approaches which will include mesoscale and computational fluid dynamics (CFD) codes to provide a better understanding of the MABL and to develop new scaling relationships more appropriate for the near coastal region (<100km). This project has the potential to make a real impact in terms of a better understanding of the operating environment for offshore wind farms.The student will work within the Centre for Renewable Energy Systems Technology (CREST). The studentship is a Cooperative Award in Science and Engineering (CASE) in conjunction with the Offshore Renewable Energy Catapult at Blyth.