Investigating wind turbine impacts on near-wake flow using profiling lidar data and large-eddy simulations with an actuator disk model
Investigating wind turbine impacts on near-wake flow using profiling lidar data and large-eddy simulations with an actuator disk model
复制标题
使用剖面激光雷达数据和致动器盘模型的大涡模拟来研究风力涡轮机对近尾流的影响
DOI：
10.1063/1.4928873
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发表时间：
2015
影响因子：
2.5
通讯作者：
M. Churchfield
中科院分区：
文献类型：
--
作者：
J. Mirocha;D. Rajewski;N. Marjanović;J. Lundquist;B. Kosović;C. Draxl;M. Churchfield
利用作物风能试验（CWEX-11）和大涡模拟（LESs）数据，采用广义驱动盘（GAD）风力涡轮机模型，研究了风力涡轮机对大气流动的影响。CWEX-11采用了来自两个多普勒激光雷达系统的速度-方位角显示（VAD）数据，对运行中的1.5 MW风力涡轮机上游和尾流中转子深度上的气流参数垂直剖面进行采样。分析了2011年7月4天期间获得的激光雷达和地面观测结果，以表征涡轮机对风速和气流变率的影响，并检查这些变化对大气稳定性的敏感性。显著的速度赤字（VD）观察在下游位置在对流和稳定的四个昼夜循环的部分，大，持续的赤字发生在稳定的条件下。在稳定和不稳定条件下，流向速度分量的方差σu同样显示出下游的大幅增加，
Wind turbine impacts on the atmospheric flow are investigated using data from the Crop Wind Energy Experiment (CWEX-11) and large-eddy simulations (LESs) utilizing a generalized actuator disk (GAD) wind turbine model. CWEX-11 employed velocity-azimuth display (VAD) data from two Doppler lidar systems to sample vertical profiles of flow parameters across the rotor depth both upstream and in the wake of an operating 1.5 MW wind turbine. Lidar and surface observations obtained during four days of July 2011 are analyzed to characterize the turbine impacts on wind speed and flow variability, and to examine the sensitivity of these changes to atmospheric stability. Significant velocity deficits ( VD) are observed at the downstream location during both convective and stable portions of four diurnal cycles, with large, sustained deficits occurring during stable conditions. Variances of the streamwise velocity component, σu, likewise show large increases downstream during both stable and unstable conditions, with ...