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A numerical investigation on the dynamic stall of a wind turbine section using different turbulent models

Ahmadi, A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. Publisher: 2009
  3. Abstract:
  4. In this article, the flow behavior around a NACA 0012 airfoil which is oscillating with different Reynolds numbers and in various amplitudes has been investigated numerically. Numerical simulations have been performed with ANSYS software. First, the 2-D geometry has been studied in different Reynolds numbers and angles of attack with various numerical methods in its static condition. This analysis was to choose the best turbulent model and comparing the grids to have the optimum one for dynamic simulations. Because the analysis was to study the blades of wind turbines, the Reynolds numbers were not arbitrary. They were in the range of 9.71e5 to 22.65e5. The angle of attack was in the range of - 41.81° to 41.81°. By choosing the forward wind speed as the independent parameter, the others like Reynolds and the amplitude of the oscillation would be known automatically. The results show that the SST turbulent model is the best choice that leads the least numerical error with respect the experimental ones. Also, a dynamic stall phenomenon is more probable at lower wind speeds in which the lift force is less
  5. Keywords:
  6. Dynamic stall ; Turbulent model ; Wind turbine ; Angles of attack ; ANSYS software ; Best choice ; Dynamic simulation ; Dynamic stalls ; Flow behaviors ; Independent parameters ; Lift force ; Numerical errors ; Numerical investigations ; Numerical simulation ; Reynolds ; Static conditions ; Turbulent models ; Wind speed ; Airfoils ; Angle of attack ; Dynamic models ; Numerical methods ; Oscillating flow ; Reynolds equation ; Reynolds number ; Turbomachine blades ; Wind power ; Wind turbines ; Wind effects ; Computer simulation
  7. Source: World Academy of Science, Engineering and Technology ; Volume 58 , 2009 , Pages 290-296 ; 2010376X (ISSN)
  8. URL: https://publications.waset.org/15287/a-numerical-investigation-on-the-dynamic-stall-of-a-wind-turbine-section-using-different-turbulent-models