How does turbulence change approaching a rotor?
How does turbulence change approaching a rotor?
复制标题
接近转子时湍流如何变化？
DOI：
--
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Søren Juhl Andersen
中科院分区：
文献类型：
--
作者：
J. Mann;A. Peña;N. Troldborg;Søren Juhl Andersen
抽象的。对于风力涡轮机上的负载计算，通常假设
接近转子的湍流并不改变它的统计数据
穿过感应区我们使用一个
安装在机舱上的前视脉冲激光雷达，用于测量低频风
在0.5和3个转子直径之间的距离处同时发生波动
上游测量结果表明，在额定风速以下，
在上游0.5转子直径处，风力变化减少了10%，
最高可提高20%。一个准稳态模型，
考虑到推力系数随风速的变化，
部分变化。湍流近场的大涡模拟
转子的致动器盘模型支持的发现，
推力曲线影响低频波动。
Abstract. For load calculations on wind turbines it is usually assumed that the
turbulence approaching the rotor does not change its statistics as it goes
through the induction zone. We investigate this assumption using a
nacelle-mounted forward-looking pulsed lidar that measures low-frequency wind
fluctuations simultaneously at distances between 0.5 and 3 rotor diameters
upstream. The measurements show that below rated wind speed the low-frequency
wind variance is reduced by up to 10 % at 0.5 rotor diameters upstream and
above rated enhanced by up to 20 %. A quasi-steady model that takes into
account the change in thrust coefficient with wind speed explains these
variations partly. Large eddy simulations of turbulence approaching an
actuator disk model of a rotor support the finding that the slope of the
thrust curve influences the low-frequency fluctuations.
湍流快速扭曲进入开放式涡轮转子
影响因子：
3.7
作者：
Graham J
通讯作者：
Graham J