涡流发生器（VG）是一种优秀的抑制流动分离的气动附件，安装VG造成的计算域复杂的拓扑结构及巨大的网格数限制了数值模拟方法在VG参数设计时的应用。针对某大型风力机叶片运行过程中需要进行流动控制的实际情况，利用三角形VG的二维统计模型及三维数值模型设计VG的高度、安装位置等参数。首先采用数值模型进行参数初步选择设计，最后利用实体建模的方式进行验证。计算结果表明，通过调整VG的高度及安装位置，实现了翼型最大升力系数的有限增加（约11％），同时小迎角阻力基本不发生变化，较大攻角阻力明显减小的目的。
Vortex generators(VG) are effective flow separation control devices; however, equipment of them has the mesh topology complex and the grids tremendous, which limits the application of CFD method in parameters design of VG. It's a real problem we meet that some large wind turbine blade needs flow control devices in operation. Therefore, vortex generators are chosen and designed by 2D and 3D numerical methods primarily about height and locations of VG. In this study, preliminary parameters are investigated by numerical methods, and then an optimum design is verified by calculation in the complex topology mesh of a real model. The results show that the airfoil lift increases properly (about 11%) at an appropriate design of height and location. Meanwhile, the drag has little difference with clean condition without VG at small angles of attack, and has large decrease at large angles of attack.
参考文献
| [1] | 刘刚,刘伟,牟斌,肖中云.涡流发生器数值计算方法研究[J].空气动力学学报,2007(02):241-244. |
| [2] | W. A. Timmer;R. P. J. O. M. van Rooij .Summary of the Delft University Wind Turbine Dedicated Airfoils[J].Journal of Solar Energy Engineering,2003(4):488-496. |
| [3] | Nikolaou IG;Politis ES;Chaviaropoulos PK .Modelling the flow around airfoils equipped with vortex generators using a modified 2D Navier-Stokes solver[J].Journal of Solar Energy Engineering,2005(2):223-233. |
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