ROTORS FOR EXTRACTING ENERGY FROM WIND AND HYDROKINETIC SOURCES

摘要

Rotors for devices such as wind turbines have one or more blades that each include a first airfoil, and a second airfoil positioned proximate the first airfoil so that the first and second airfoils interact aerodynamically during rotation of the rotor. The first airfoil can be configured to pivot so that its angle of attack remains approximately zero.

主权项

1. A rotor for extracting energy from a moving fluid, comprising:
a frame; a first airfoil mounted on the frame and configured to pivot in relation to the frame; and a second airfoil fixed to the frame proximate the first airfoil so that the second airfoil interacts aerodynamically with the first airfoil in response to the moving fluid.