Darrieus型垂直轴风力机气动特性研究

Aerodynamic Study on the Darrieus Vertical Axis Wind Turbine

本文结合叶素动量算法,研究了Jacobs等人建立的关于达里厄型垂直轴风力机的几种数据库,并进行了研究比对.基于美国桑迪亚国家实验室的现场可靠的实验研究,通过建立在几种数据库上的模拟仿真和实验数据比对,研究表明,叶素动量算法模拟结果可以和大多数的数据库很好的吻合,但是动态失速条件下例外,尤其是在低雷诺数时,原因是对升力系数过低的估算.研究还表明,在不同型号不同转速条件下Jacobs数据曲线更接近于实验曲线,因此,利用叶素动量算法对达里厄型垂直轴风力机进行仿真模拟研究时,应首选Jacobs数据库.

The different aerodynamic databases of Jacobs and other researchers are studied and compared. The databases are adopted in conjunction with a Blade-Element Momentum algorithm. Experimental data deriving from Sandia National Laboratories field test available in literature for a wide range of rotor sizes are considered and compared to the simulation results. Research shows that Blade Element-Momentum Algorithm simulation results are consistent well with most of the database, but the dynamic stall exceptional conditions, especially at low Reynolds number, because of the low lift coe？cient estimates. The study also showed that different models under different conditions Jacobs speed data curve is closer to the experimental curve. Therefore the results highlight that the Jacobs database should be preferred for BE-M simulations. Overall, the main databases available in literature are considered and the results obtained compared, in order to provide the vertical axis turbine researchers with a practical indication on the methodology to apply for their studies.