Studies on a Horizontal Axis Wind Turbine With Passive Pitch-Flap Mechanism (Performance and Flow Analysis Around Wind Turbine)

We describe the development of a passive system to control the output power of a horizontal axis wind turbine. This pitch-flap coupling mechanism can reduce rotor power above rated wind speed. This mechanism has two kinds of blade motions: the flapping and the pitching motions. Braking effects are investigated experimentally