Atmospheric icing effects of S816 airfoil on a 600 kW wind turbine's performance

Document Type : Article

Author

Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran

Abstract

The aerodynamic loads and energy losses for a typical 600 KW wind turbine with S816 airfoil blade under two different icing conditions, have been studied. Three sections at different radial positions are considered for estimation of the icing effect along the blade. Ice accretion simulations in wet and dry regimes are performed, using the NASA LEWICE 3.2 computer program. The airflow simulations are carried out with CFD methods and implementing the SST k-ω turbulence model. The results of these simulations including; streamlines, surface pressure, skin friction, lift, and drag coefficients are inspected for both clean and iced-airfoils. In the case of wet iced-airfoil, a separation bubble is created in the leading edge due to a horn shaped ice and further downstream, the airflow is reattached. Ice-induced separation bubbles dominate the flow field and the aerodynamic performance of the wind turbine. In order to assess the production losses, the Blade Element Momentum (BEM) theory is used to calculate the power curves for clean and iced wind turbine blades. In the case of dry regime, the performance deterioration is about 30% and in another case, the turbine fails to produce any power at all.

Keywords

Main Subjects


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