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Energy - Renewable and Green Energy | Smart Rotor Modeling - Aero-Servo-Elastic Modeling of a Smart Rotor with Adaptive Trailing Edge

Smart Rotor Modeling

Aero-Servo-Elastic Modeling of a Smart Rotor with Adaptive Trailing Edge Flaps

Bergami, Leonardo

2014, X, 156 p. 72 illus., 60 illus. in color.

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  • Addresses the development of a smart rotor with an active load alleviation system featuring adaptive trailing edge flaps on the rotor blades
  • Investigates the smart rotor development from an aero-servo-elastic perspective
  • Recipient of the Excellent Young Wind Doctor Award 2013of the European Academy of Wind Energy (EAWE)

A smart rotor is a wind turbine rotor that, through a combination of sensors, control units and actuators actively reduces the variation of the aerodynamic loads it has to withstand. Smart rotors feature a promising load alleviation potential, and might provide the technological breakthrough required by the next generation of large wind turbine rotors.

The book presents the aero-servo-elastic model of a smart rotor with Adaptive Trailing Edge Flaps for active load alleviation, and provides an insight on the rotor aerodynamic, structural, and control modeling. A novel model for the unsteady aerodynamics of an airfoil section with flap is presented, and coupled with a multi-body structural representation. A smart rotor configuration is proposed, where the Adaptive Trailing Edge Flaps extend along the outer 20 % of the blade span. Linear Quadratic and Model Predictive algorithms are formulated to control the flap deflection.  The potential of the smart rotor is finally confirmed by simulations in a turbulent wind field. A significant reduction of the fatigue loads on the blades is reported:  the flaps, which cover no more than 1.5 % of the blade surface, reduce the fatigue load by 15 %; a combination of flap and individual pitch control allows for fatigue reductions up to 30 %.

Content Level » Research

Keywords » Smart Rotor - Wind Energy - Wind Turbines

Related subjects » Classical Continuum Physics - Energy Technology - Renewable and Green Energy

Table of contents 

Introduction.- Simulation Environment.- Load Analysis.- ATEFlap Aerodynamic Model.- Adaptive Trailing Edge Flap placement.- Preliminary evaluation with feed-forward cyclic control.- Model Based control algorithms for a rotor with ATEF.- Summary of findings and future work.- Conclusion.

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