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在中性大气层结条件下,利用35 m铁塔上五层不同高度处的有效风速,分析得到了非均一地形近地面层风速廓线特点及由粗糙元所决定的粗糙度。结果表明:(1)近地面层风速廓线一般符合对数风速廓线模式,其相关系数均大于0.985,标准偏差为0.04左右;(2)粗糙度的值为1.25 m。但由于外界流体运动状态改变可引起粗糙度出现起伏,其变化范围较大,一般在0.038～4.903 m,与风速之间的相关系数为-0.953。
Under the condition of neutral atmospheric junction, the wind speed profile of near-surface layer of inhomogeneous terrain and the roughness determined by the roughness element are obtained by using the effective wind speed at five levels of 35m tower. The results show that: (1) The wind speed profile of the near-surface layer generally complies with the logarithmic wind speed profile model with correlation coefficients greater than 0.985 and a standard deviation of about 0.04; (2) Roughness is 1.25 m. However, due to changes in the state of the external fluid movement can cause roughness ups and downs, the larger the range, generally in the 0.038 ~ 4.903 m, and wind speed correlation coefficient of -0.953.