Numerical Study of the Wake Flow of a Wind Turbine with Consideration of the Inflow Turbulence
محل انتشار: ژورنال مهندسی عمران، دوره: 4، شماره: 8
سال انتشار: 1397
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 286
فایل این مقاله در 10 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_CEJ-4-8_016
تاریخ نمایه سازی: 6 آذر 1397
چکیده مقاله:
Considering the fact that wind turbines operate at the bottom of the atmospheric boundary layer (ABL) where the turbulence is at a high level, and the difficulty of mesh generation in the fully modeled numerical simulation, it is necessary to carry out researches to study the wake flow of wind turbines with consideration of the inflow turbulence. Therefore, a numerical method generating turbulence was proposed and the results show good agreement with those in experiments, based on which the flow fields in the wake of a wind turbine at two tip speed ratios are examined in detail through three actuator methods, namely, ADM, ADM-R and ALM. The performances of these methods were studied and the error sources for each method are clarified. Moreover, the computational efficiency were revealed and the influencing factor for the efficiency is concluded. Besides, the equilibrium relation of the N-S equation in the wake is revealed, which provides a theoretical basis for the optimal arrangement of the wind turbine. It shows that the mean velocity and fluctuating velocity vary greatly near the wind turbine, and become stable gradually away from the wind turbine. The results of ALM method shows the best agreement with the experiment. At near wake region, the turbulent stress term, pressure gradient term and convection term mainly contribute to the equation equilibrium, and convection term is in equilibrium with the turbulent stress term at the far wake.
کلیدواژه ها:
نویسندگان
Xiaoyu Luo
Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou, Guangdong, China
Qiuming Li
School of Civil Engineering and Mechanic , Huazhong University of Science and Technology , Wuhan, China
Shishu Xiong
School of Civil Engineering and Mechanic , Huazhong University of Science and Technology , Wuhan, China
Zhenqing Liu
School of Civil Engineering and Mechanic , Huazhong University of Science and Technology , Wuhan, China