A wind turbine assembly comprising a generally cylindrical wind turbine rotor that is supported by a rotor support and operable to rotate about a rotational axis, the rotor comprising a plurality of aerofoil blades with each aerofoil blade having a leading edge, a trailing edge, a suction surface, a pressure surface, and an aerofoil chord having a chord length between the leading edge and the trailing edge, the aerofoil blades being in a generally cylindrical arrangement around the rotational axis with the leading edges at a larger radial separation from the rotational axis than the trailing edges, and the chords being angled relative to radii through the rotational axis such that the suction surfaces and pressure surfaces respectively face generally outwardly and inwardly from and to the rotational axis, wherein the minimum separation (S) between the leading edge of a first aerofoil and the suction surface of an adjacent aerofoil is less than the chord length (L.sub.C), and wherein the location of the maximum thickness of each aerofoil blade (L.sub.Tmax) along the chord (L.sub.C)) is less than 20% of the chord length (L) from the leading edge.

The present disclosure relates to a rotor blade of a wind power installation, at least comprising a first rotor blade component having: a first end for arranging on the wind power installation, and a second end for connecting to a second rotor blade component; a second rotor blade component having: a first end for arranging on the first rotor blade component, and a second end wherein the first rotor blade component can be connected to the second rotor blade component at a separating point to the rotor blade, wherein the rotor blade has an aerodynamically open profile at the separating point.

A lift type rotor blade which has a chord length gradually increased from a blade root to a maximum chord length portion being a base portion of a blade end portion, includes a leading edge, a front surface and an inclined portion formed on the blade end portion. The leading edge has a maximum thickness that is the maximum at the blade root and is gradually and continuously decreased from the blade root to a tip portion via the maximum chord length portion in a side view. The front surface is gradually inclined in a direction of a back surface from the blade root to the maximum chord length portion such that an interval between the front and back surfaces is continuously decreased. The inclined portion is inclined in a front surface direction from the maximum chord length portion.

Disclosed is a multiple blade wind turbine (MBWT). The MBWT includes: at least one rotor comprising two closed loop tracks positioned parallel or equidistant to one another and a plurality of airfoils interspaced within the tracks. The plurality of airfoils are connected at each end to one of said tracks and are fully rotatable with respect to said closed loop tracks. A transmission is connected to one of the tracks. The track drives the transmission and an electric generator is connected to said transmission for generating electricity. The rotors are oriented vertically or horizontally with respect to a vertical support structure that is used to support the rotors. The MBWT's design allows the electric generator(s) and transmission system to be housed relatively close to ground level. This configuration reduces the mass of the central support tower and reduces the construction and ongoing maintenance costs.

A wind turbine for converting wind into mechanical energy, includes a support and a vane rotatably connected to the support, the vane including an elongated body and a wind receptacle formed as a lid hinged to the body such that the receptacle can adopt an open configuration wherein the lid is hinged away from the body, and a closed configuration wherein the lid is hinged towards the body, the lid having an outer surface directed away from the wind when the receptacle takes the open configuration, and an opposite inner surface, wherein the inner surface of the lid is provided with profiles protruding from the inner surface, and extending in a direction perpendicular to the longitudinal direction of the vane, and wherein the profiles diverge toward the site where the lid is hinged to the body.

A rotor blade for a wind power generator which is a lift type blade having a wide chord length at a blade end portion. The rotor blade (1) comprises a side surface with a thickness that gradually decreases from a blade root (1A) to a blade end portion, and a front surface (1D) which gradually inclines in a direction of a back surface (1E) from the blade root (1A) to the blade end portion. Owing to a difference in the thickness, a speed of airflow passing in a chord direction at the blade root, when the rotor blade is rotating, increases at the blade end portion, and air pressure at the blade root is reduces at the blade end portion, and airflow concentrating, due to the reduction of the air pressure at the blade root, naturally moves to the blade end portion due to a difference in the air pressure.

A wind turbine for converting wind into mechanical energy, includes a support and a vane rotatably connected to the support, the vane including an elongated body and a wind receptacle formed as a lid hinged to the body such that the receptacle can adopt an open configuration wherein the lid is hinged away from the body, and a closed configuration wherein the lid is hinged towards the body, the lid having an outer surface directed away from the wind when the receptacle takes the open configuration, and an opposite inner surface, wherein the inner surface of the lid is provided with profiles protruding from the inner surface, and extending in a direction perpendicular to the longitudinal direction of the vane, and wherein the profiles diverge toward the site where the lid is hinged to the body.

Double blade airfoils and related systems are disclosed. The double blade design may efficiently use a minimal amount of material yet achieve exceptional aerodynamic efficiencies well above the previously understood theoretical maximum. The disclosed designs may operate at lower wind speeds than those known in the art. Furthermore, the balance of forces generated by the disclosed designs may also reduce the stress felt by the airfoils and rotor, enhancing the longevity of the system.

Disclosed is a multiple blade wind turbine (MBWT). The MBWT includes: at least one rotor comprising two closed loop tracks positioned parallel or equidistant to one another and a plurality of airfoils interspaced within the tracks. The plurality of airfoils are connected at each end to one of said tracks and are fully rotatable with respect to said closed loop tracks. A transmission is connected to one of the tracks. The track drives the transmission and an electric generator is connected to said transmission for generating electricity. The rotors are oriented vertically or horizontally with respect to a vertical support structure that is used to support the rotors. The MBWT's design allows the electric generator(s) and transmission system to be housed relatively close to ground level. This configuration reduces the mass of the central support tower and reduces the construction and ongoing maintenance costs.

Double blade airfoils and related systems are disclosed. The double blade design may efficiently use a minimal amount of material yet achieve exceptional aerodynamic efficiencies well above the previously understood theoretical maximum. The disclosed designs may operate at lower wind speeds than those known in the art. Furthermore, the balance of forces generated by the disclosed designs may also reduce the stress felt by the airfoils and rotor, enhancing the longevity of the system.