新疆达坂城风区顺风向脉动风功率谱

为研究新疆乌鲁木齐所处达坂城风区的复杂脉动风环境，基于实测风场风速数据分析并拟合了该风区的顺风向脉动风功率谱。结果表明：以反比例函数拟合山区峡谷地形平均风速与湍流强度的关系误差较小；山区峡谷地形湍流积分尺度分布较离散，但整体随平均风速的增大而增大；考虑地形系数的Kaimal修正谱在含能区和惯性子区间能较好地表征实测谱，在耗能区选用三参数拟合描述实测谱效果良好；选用过渡函数来描述惯性子区间与耗能区接触区域的功率谱，拟合效果较为理想。可见达坂城风区具有特殊顺风向脉动风特性，以修正谱和拟合谱分段构成的函数模型可用于表征该风区顺风向脉动风功率谱。

Downwind fluctuating wind power spectrum of Dabancheng Wind area in Xinjiang

In order to study the complex fluctuating wind environment of Dabancheng wind area located in Urumqi, Xinjiang, the measured wind speed data was used to analyze and fit the downwind fluctuating wind power spectrum of the wind area. The results show that the error in fitting the relationship between mean wind speed and turbulence intensity in mountain canyon terrain with an inverse proportional function is small. The integral scale distribution of topographic turbulence in mountain canyons is more discrete, but overall increases with the increase of mean wind speed. The Kaimal modified spectrum considering terrain coefficient can represent the measured spectrum better in Energy-containing Range and Inertial Subrange, and the three-parameter fitting in Dissipation Range is chosen to describe the measured wind spectrum well. The transition function is used to describe the power spectrum of the contact region between Inertial Subrange and Dissipation Range, and the fitting effect is better. It is concluded that Dabancheng wind area has special downwind fluctuating wind characteristics, and the function model composed of modified spectral and fitted spectral segments can be used to characterize the downwind pulsating wind power spectrum in this wind area.