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Wind tunnel testing of a horizontal axis wind turbine rotor and comparison with simulations from two Blade Element Momentum codes
Abstract The results of wind tunnel tests performed on a full scale horizontal axis wind turbine with a rotor diameter of 1.2m are presented, analyzed and compared with those predicted by WT_Perf and Qblade Blade Element Momentum (BEM) codes. The studied rotor, carved in wood, belongs to a family of wind turbines suitable for production by unskilled persons with hand tools, with more than one thousand turbines already produced. The experiments were conducted in a 2×2m open test chamber closed circuit wind tunnel at wind speeds of 3.0; 3.7; 4.4; 5.5; 7.2; 7.7m/s and shaft power with varying tip speed ratios (λ) was measured. The maximum experimentally obtained power coefficient (C p) was found to vary significantly with the wind speed, between C p=0.32 for 3.0m/s and C p=0.40 for 7.7m/s. The tip speed ratio corresponding to peak power coefficient was found to vary inversely with the wind speed, from λ=6.5 at 3.0m/s to λ=4.8 at 7.7m/s. Comparison of the obtained wind tunnel data with the results provided by the two BEM codes was found to be good.
Highlights A 1.2m diameter full scale horizontal axis wind turbine is investigated. A fair power coefficient (C p) of 0.40 achieved despite the small size of the rotor. Good agreement of experiments and simulations for peak C p. Simulations underestimate tip speed ratio for peak C p. Tip speed ratio corresponding to peak C p found to vary inversely with wind speed.
Wind tunnel testing of a horizontal axis wind turbine rotor and comparison with simulations from two Blade Element Momentum codes
Abstract The results of wind tunnel tests performed on a full scale horizontal axis wind turbine with a rotor diameter of 1.2m are presented, analyzed and compared with those predicted by WT_Perf and Qblade Blade Element Momentum (BEM) codes. The studied rotor, carved in wood, belongs to a family of wind turbines suitable for production by unskilled persons with hand tools, with more than one thousand turbines already produced. The experiments were conducted in a 2×2m open test chamber closed circuit wind tunnel at wind speeds of 3.0; 3.7; 4.4; 5.5; 7.2; 7.7m/s and shaft power with varying tip speed ratios (λ) was measured. The maximum experimentally obtained power coefficient (C p) was found to vary significantly with the wind speed, between C p=0.32 for 3.0m/s and C p=0.40 for 7.7m/s. The tip speed ratio corresponding to peak power coefficient was found to vary inversely with the wind speed, from λ=6.5 at 3.0m/s to λ=4.8 at 7.7m/s. Comparison of the obtained wind tunnel data with the results provided by the two BEM codes was found to be good.
Highlights A 1.2m diameter full scale horizontal axis wind turbine is investigated. A fair power coefficient (C p) of 0.40 achieved despite the small size of the rotor. Good agreement of experiments and simulations for peak C p. Simulations underestimate tip speed ratio for peak C p. Tip speed ratio corresponding to peak C p found to vary inversely with wind speed.
Wind tunnel testing of a horizontal axis wind turbine rotor and comparison with simulations from two Blade Element Momentum codes
Monteiro, João P. (author) / Silvestre, Miguel R. (author) / Piggott, Hugh (author) / André, Jorge C. (author)
Journal of Wind Engineering and Industrial Aerodynamics ; 123 ; 99-106
2013-09-10
8 pages
Article (Journal)
Electronic Resource
English