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Wind Turbine Technology: Fundamental Concepts in Wind Turbine Engineering, Second Edition

David A. Spera, Ph.D.
David A. Spera, Ph.D.
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ASME Press
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In this chapter we will discuss the detailed characteristics of the lifting surfaces which we know as airfoils, in order to provide guidance in the selection of airfoil shapes that will perform satisfactorily over the broad operating environment of a wind turbine. In addition, the fundamental fluid-dynamic principles involved in modeling the structure of rotor wakes and integrating wake-induced effects over an array of turbines are presented in this chapter.

Wind turbines operate by the action of the relative wind (the natural wind plus wind caused by rotor motion and rotor-induced flow), which creates aerodynamic forces on the rotating...

Characteristic Behavior of Airfoils
Airfoil Aerodynamic Requirements
Airfoil Selection
Field Performance Testing of Wind Turbine Airfoils
Tip Shapes of HAWT Blades
Wind Turbine Wake Effects
Development of Wind Turbine Wake Models
Wake Geometry Models
Integration of Wakes for Array Effect
Analytical Results Obtained with Wake Models
Measurement of Wake Effects
Summary Comments on Wind Turbine Wake Effects
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