Blade for wind driven machine - has auxiliary blades mounted on leading edge and on trailing edge

摘要

The blade of a wind driven machine consists of a main blade (B) to which two auxiliary blades (A,C) are attached. The main blade (B) has a pressure surface of elliptical form and has asymmetrical pressure and suction surfaces with the suction surface area being 1.03 times as great as the pressure surface area. The first auxiliary blade (B) is mounted at the leading edge of the main blade and forms a nozzle with the leading edge. The second auxiliary blade (C) is mounted beyond the trailing edge of the main blade. USE/ADVANTAGE - Blade for wind machine which utilises wind energy more effectively.