Shutdown characteristics of the Mod-0 wind turbine with aileron controls
- Resource Type
- Conference
- Authors
- Source
- Conference: Horizontal-axis wind turbine technology conference, Cleveland, OH, USA, 8 May 1984
- Subject
- 17 WIND ENERGY WIND TURBINES
SHUTDOWNS
CONTROL EQUIPMENT
TESTING
EQUIPMENT
MACHINERY
TURBINES
TURBOMACHINERY 170602* -- Wind Energy Engineering-- Turbine Design & Operation
- Language
- English
Horizontal-axis wind turbines utilize partial or full variable blade pitch to regulate rotor speed. The weight and costs of these systems indicated a need for alternate methods of rotor control. Aileron control is an alternative which has potential to meet this need. The NASA Lewis Research Center has been experimentally testing aileron control rotors on the Mod-0 wind turbine to determine their power regulation and shutdown characteristics. This paper presents experimental and analytical shutdown test results for a 38 percent chord aileron-control rotor. These results indicated that the 38 percent chord ailerons provided overspeed protection over the entire Mod-0 operational windspeed range, and had a no-load equilibrium tip speed ratio of 1.9. Thus, the 38 percent chord ailerons had much improved aerodynamic braking capability when compared with the first aileron-control rotor having 20 percent chord ailerons.