Aerodynamic loads and rotor performance for the Darrieus wind turbines
Conference
·
· AIAA Pap.; (United States)
OSTI ID:5460260
Aerodynamic blade loads and rotor performance are studied for the Darrieus windmill by using a double-multiple streamtube model. The Darrieus is represented as a pair of actuator disks in tandem at each level of the rotor, with upstream and downstream half-cycles. An equilibrium velocity exists in the center plane, and the upwind velocity is higher than the downwind velocity lift and drag coefficients are calculated from the Reynolds number and the local angle of attack. Half-rotor torque and power are found by averaging the contributions from each streamtube at each position of the rotor in the upwind cycle. An example is provided for a 17 m Darrieus employing NACA blades. While the method is found to be suitable for predicting blade and rotor performance, the need to incorporate the effects of dynamic stall in the model is stressed as a means to improve accuracy.
- Research Organization:
- Hydro-Quebec, Institut de Recherche, Varennes, Canada
- OSTI ID:
- 5460260
- Report Number(s):
- CONF-811205-
- Conference Information:
- Journal Name: AIAA Pap.; (United States) Journal Volume: 81-2582
- Country of Publication:
- United States
- Language:
- English
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