Based on the original blade of NREL Phase VI horizontal-axis wind turbine, a double-wings blade is proposed in this paper. The blade aerodynamic performance of the new horizontal axis wind turbine is numerically simulated under different incoming wind speeds. Firstly, the accuracy and reliability of the simulation method is validated by the traditional NREL Phase VI wind turbine with the experiment results. Secondly, the velocity streamlines at different cross sections along the blade spanwise are studied. The results show that the double-wings blade can suppress the flow separation effectively. Furthermore, the comparisons of torque and bending moment among these double-wings wind turbines under the same condition are made to analyze the aerodynamic performance and the wind energy absorption coefficient. Lastly, the impact of the setting angle of blade on wind turbine performance is considered in this paper.
Key words
wind turbines /
flow control /
wind power /
double-wings
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