Volume 26, Issue 1 (7-2007)
2007, 26(1): 247-268 |
Back to browse issues page
Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
M. R. Soltani, M. Seddighi, and A. Bakhshalipour. Effect of Reduced Frequency on the Unsteady Aerodynamic Performance of a Wind Turbine Blade Section. Computational Methods in Engineering 2007; 26 (1) :247-268
URL: http://jcme.iut.ac.ir/article-1-419-en.html
URL: http://jcme.iut.ac.ir/article-1-419-en.html
Abstract: (5430 Views)
The blades of wind turbines are the most important parts in producing power output. In this study, a section of a 660 KW wind turbine blade will be installed in Iran in near future was tested in a wind tunnel. In addition to steady tests, various unsteady tests including the effects of reduced frequency, mean angle of attack, and amplitudes were carried out. The preliminary results show strong effects of reduced frequency on the aerodynamic coefficients of the airfoil. Moreover, increasing the reduced frequency delays dynamic stall angle of attack but increases lift and drag coefficients compared to the static results. Further, the values of the aerodynamic coefficients in the upstroke motion (increasing angle of attack) are different from their corresponding values in the downstroke (decreasing angle of attack). These differences create a hysteresis loop where its width and shape are strong functions of reduced frequency, mean angle of attack, and amplitudes.
