吉阳核电厂址气象铁塔塔层风频规律及风速分布拟合研究

通过安徽吉阳核电厂址气象塔观测系统获取观测数据,研究了该地区的风频规律性,并按南沿江流、北沿江流对塔层风速分布进行幂函数近似拟合,估算了地表粗糙度。结果表明：本区主导风向多集中在偏东北风上,而且频率很高,次主导风向则略有差异;塔层风廓线分布基本符合幂函数关系,由廓线求出的n指数推荐值为：A类0.165,B类0.167,C类0.192,D类0.313,E类0.406,F类0.463;南沿江流方向的地表粗糙度为1.547 063 m,北沿江流方向的地表粗糙度为1.738 45 m。

A Analysis of the Law of the Frequencies of Wind and the Fitting of the Tower-Layer Wind Speed of the Meteorological Tower of the Jiyang Nuclear Power Plant

Base on the observations data from the meteorological tower of the Jiyang nuclear power plant in AnHui,the law of the frequencies of wind is analysed,and the Tower-layer wind speed is fitting approximation power function by the south and north along the river flow,and finally calculate the surface roughness.Results showed that the dominant wind direction is north-easterly,and the frequency is high,and the sub-dominant wind direction is slightly different;the Tower-layer wind profile generally consistent with the power function,and the n index of recommended values which are calculated by the profiles：the class A is 0.165,the B is 0.167,the C is 0.192,the D is 0.313,the E is 0.406,and the F is 0.463;the surface roughness of the south along the river flow is 1.547063 m,and the surface roughness of the north along the river flow is 1.738 45 m.