Determination of angle of attack for rotating blades

Abstract

For a rotating blade the flow passing by a blade section is bended due to the rotation and the local flow field is influenced by the bound circulation on the blade. As a further complication, 3-D effects from tip and root vortices do a precise definition of the angle of attack (AOA) a difficult task. Two methods for determining the AOA on rotating blade from velocity and pressure measurements are presented.

Keywords

• Wind turbine
• 3-D rotational effects
• Numerical simulation
• blade section