IMPROVED TURBINE

摘要

A fluid turbine (30) for extraction of power from a moving fluid, particularly suitable as a wind turbine, includes a rotor (32) mounted to a support structure (31) for rotation about a horizontal axis (39), the rotor (32) having multiple blades (37) extending forwardly and outwardly from a hub (36) and a ring fairing (38) secured to the blades (37) at their outer ends and rotatable with the blades (37) concentrically about the axis. The ring fairing (38) has at least one peripheral location a radial cross section shaped to develop in operation a circulatory flow (60) about the cross section in such a direction as to increase the velocity of fluid flow between the ring fairing (38) and the hub (36).