Supplemental Learning Module

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Supplemental Learning Module COHERENT APPLICATION THREADS CATs   Wind Turbines Supplemental Learning Module EK 301 MECHANICS 1 Wind Turbines & Friction Don Wroblewski Associate Professor, Mechanical Engineering Associate Chair, Aerospace Engineering Undergraduate Program

BRAKING AND FRICTION BRAKE Braking used to stop rotor in high winds, to prevent structural failure

BRAKING AND FRICTION MB rBR N F N x Moment from aerodynamic forces on blades MB x Brake FRICTION force rBR N Brake NORMAL force N F VIEW FROM BELOW Maximum FRICTION force Sum moments about x axis FRICTION force needed to prevent motion m is static coefficient of friction Minimum NORMAL force needed to prevent motion,

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