如东沿海近地层风速及风能时空分布特征研究

A Study of Temporal and Spatial DistributionCharacteristics in Near-surface Wind Speed and Wind Energy in Rudong Coastal

利用如东东凌风塔2005年观测资料,研究了该区域近地层风速及风能时空分布特征。结果表明,如东沿海地区5月前后是大风值时段,12月前后为次大风值时段;日变化中,风速最大值出现在17时左右,且高层滞后低层约1小时;风速随高度按自然对数规律增大,10～25m高度随高度递增较明显,40～60m高度的风速主要集中在4～8m·s-1;距地面10m高度年平均风功率密度约175W.m-2,随高度呈现乘幂增加趋势,60m高度处达333W·m-2,平均约270W·m-2。

Using the wind observation data which is measured by the Rudong Dongling wind tower of 2005,this article studies the temporal and spatial distribution characteristics in near-surface wind speed and wind energy in this region.The results show that the maximum wind speed occurs in May,the second maximum wind speed appears in December;As to the diurnal variation,the maximum wind speed value appears near 17：00,and the maximum wind speed value in the high layer is one hour later than that in the lower layer;The wind speed increases with height according to the rules of natural logarithm,between 10m and 25m,the wind speed increases obviously with height,between 40m to 60m,the wind speed mostly ranges from 4m/s to 8m/s;at the height of 10m,The wind power density is about 175W/m^2,and the wind power density increases with height according to the rules of power,at the height of 60m,333W/m^2,the wind power density is about 270W/m^2 on average.