An insight into the separate flow and stall delay for HAWT
An insight into the separate flow and stall delay for HAWT
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DOI：
10.1016/j.renene.2010.05.021
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发表时间：
2011
期刊：
影响因子：
8.7
通讯作者：
Guo-liang Yu;X. Shen;Xiaocheng Zhu;Z. Du
中科院分区：
文献类型：
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作者：
Guo-liang Yu;X. Shen;Xiaocheng Zhu;Z. Du
研究了风力机转子在稳态非偏航状态下的流动特性和叶片旋转引起的失速延迟现象。采用不可压缩的reynolds -average Navier-Stokes解算器，求解了5 ~ 10 m/s风速下的所有情况，风速间隔为1 m/s。在10 m/s风速下，CFD结果与实验结果吻合较好，但在10 m/s风速下，由于相对较大的流动分离和叶片吸力面三维展向流动存在一定偏差。同时，采用带Du-Selig失速延迟模型和不带Du-Selig失速延迟模型的升力面代码进行功率预测。本文开发了一个MATLAB程序，从三维CFD计算中提取气动力系数，并与二维翼型风洞实验进行了比较，以证明在叶片内跨位置的失速延迟和增升现象。将计算结果与基于美国宇航局艾姆斯风洞非定常气动实验测量的Du-Selig模型和升力面法得到的修正值进行了比较。
The flow characteristics and the stall delay phenomenon of wind turbine rotor due to blade rotation in the steady state non-yawed conditions are investigated. An incompressible Reynolds-averaged Navier–Stokes solver is applied to carry out all the cases at different wind speeds from 5 m/s to 10 m/s with an interval of 1 m/s. CFD results turn out to agree well with experimental ones at incoming wind speeds below 10 m/s, though at 10 m/s some deviations exist due to the relative large flow separation and 3D spanwise flow over the suction surface of the blade. In the meanwhile, a lifting surface code with and without Du–Selig stall delay model is used to predict the power. A MATLAB code is developed to extract aerodynamic force coefficients from 3D CFD computations which are compared with the 2D airfoil wind tunnel experiment to demonstrate the stall delay and augmented lift phenomenon particularly at inboard span locations of the blade. The computational results are compared with the corrected value by the Du–Selig model and a lifting surface method derived data based on the measurements of the Unsteady Aerodynamic Experiment at the NASA Ames wind tunnel.