| 《50W lamp with vertical axis wind turbine experiment and research》is a cooperated project with a company of Hebei Hengshui City. Designed six sets of 50W vertical axis wind turbine impellers, campared the power output characteristics with truck experiment and selected optimized utilization of wind energy , better starting performance, more stable operating performance, 50W vertical axis wind turbines.The designed six sets of impellers:①symmetrical NACA0018 airfoil ,diameter is 960mm,three blades;②symmetrical NACA0018 airfoil, diameter is 960mm, 5 blades;③symmetrical NACA0018 airfoil diameter is 860mm, 5 blades;④thicker symmetrical airfoil NACA0018 , diameter is 960mm ,three blades;⑤thicker symmetrical airfoil NACA0018 , diameter is 960mm, 5 blades;⑥thicker symmetric airfoil NACA0018, diameter is 860mm,5 blades .Blades are all 1m height and were wrapped multi-layers Epoxy resin outside; hub was made of stainless steel material, and did the structure optimized design according to truss theory. Through the power output experiment, choosethe a optimum matching program.The results show that:①the power output with repair-type airfoil is superior to the no repair-type airfoil and it indicated that the modification principle is feasible.②By comparing the start speed and output power characteristics of the six sets of impellers, the symmetric thickening of repair-type airfoil NACA0018 ,960mm diameter impeller is the better impeller with lower start speed and higher power at rated speed .
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