The invention relates to a rotor blade (100) for a wind turbine, having a rotor blade root (102), a rotor blade outer edge (104), a leading edge (106) and a trailing edge (108), The leading edge (106) and the trailing edge (108) define a chord (110), the length of which increases from the rotor blade root (102) to the rotor blade outer edge (104), Chord centre points (112) define a rotor wing centre line (114) running from the rotor blade root (0.102) to the rotor blade outer edge (104) and the rotor wing centre line (114) divides the rotor blade outer edge (104) into a leading edge portion (116) and a trailing edge portion (118), a winglet (120) that extends only along the trailing edge portion (118) being arranged on the rotor blade outer edge (104).

A pultruded fibrous composite strip for wind turbine spar caps, a spar cap having such a strip, and a wind turbine blade having such spar cap. The strip has longitudinally extending unidirectional fibers and an elongate body having first and second edge regions separated in the longitudinal direction of the strip by an intermediate region. The intermediate region has first and second mutually opposed longitudinally extending and parallelly disposed planar surfaces. The strip's thickness is measurable perpendicular to the planar surfaces and the width is measurable parallel to the planar surfaces and perpendicular to the longitudinal direction of the strip. In the strip, the first and/or the second edge regions, starting from the intermediate region and extending longitudinally, simultaneously tapers along the width and the thickness of the strip.

An axial flow impeller includes a hub and a blade at the hub. A blade edge of the blade includes a blade root edge, a front blade edge, a blade top edge, and a rear blade edge connected sequentially. The blade includes a divider strip arranged between the front blade edge and the rear blade edge and connecting the blade root edge and the blade top edge. At a same circumference, a ratio between a circumferential span from the divider to the front blade edge and a circumferential span from the front blade edge to the rear blade edge is equal to or greater than 0.2 and equal to or smaller than 0.4, a thickness of the divider strip is greater than thicknesses of other portions of the blade, and a thickness of the rear blade edge is smaller than a thickness of the front blade edge.

There is provided a blower realizing characteristics in which the pressure is reduced as the flow rate is increased in pressure-flow rate characteristics in a case where an impeller rotates at a fixed rotation speed, while having a simple structure. An impeller includes a main plate formed in a disc shape and a plurality of main blades formed to stand on the main plate, the impeller is extended to a position facing the inside of a discharge flow path formed so as to circle on an outer peripheral side, and auxiliary blades are formed to stand on an extended portion extended inside the discharge flow path.

A wind turbine blade apparatus at least includes a wind turbine blade body, wherein a serration portion is disposed on at least on a part of a trailing edge of the wind turbine blade body, the serration portion having a saw-teeth shape where a mountain portion and a valley portion are arranged alternately in a blade longitudinal direction, and wherein a chord-directional cross section of the wind turbine blade body along a chord direction is formed to have an airfoil shape at any position in a region from the mountain portion to the valley portion.

A rotor blade for a wind power installation, which extends in a longitudinal direction with a profile course from a blade connector to a blade tip, wherein the profile course contains at least one profile, comprising: a suction side and a pressure side, a relative profile thickness of greater than 25%, a profile chord, which extends between a leading edge and a trailing edge of the profile and has a length which defines the profile depth, a mean line which extends at least partially below the profile chord, a convex region which extends on the suction side from the trailing edge, and a convex region which extends on the pressure side from the trailing edge, wherein the convex region on the pressure side defines a rounded transition region of the pressure side to the trailing edge.

A tidal current energy generating device includes a generator, a connecting shaft, an impeller and an adjustment assembly. The impeller includes an impeller hub and an impeller blade arranged thereon. The impeller hub is connected with the connecting shaft, and the generator is connected with the impeller hub. The impeller blade is driven under the action of a tidal current to drive the impeller hub to rotate synchronously around an axis of the connecting shaft, driving the generator to generate electricity. The adjustment assembly is connected with the impeller blade, and can be driven to swing under the action of the tidal current to drive the impeller blade to rotate around the axis of the impeller blade relative to the impeller hub, thereby adjusting the angle of the impeller blade.

An energy-producing system comprising an axle configured to be driven by an electric vehicle's wheels when in motion. The axle supports a series of wind-catching cups contained within an aerodynamic housing configured to direct air to the cups while also increasing the air speed. During vehicle motion, the cups are acted upon by rushing air causing the rotation of the axle such that the rotation may be transferred into energy via a generator/alternator linked thereto. A series of similarly polarized magnets integrated on said cups and/or spacers and/or housing proximate thereto further maintain the axle in motion during short vehicle stops. The system extends the life of the batteries between charges as well the distance the vehicle can travel between charges. A power controller is configured to distribute power from said generator to an axle drive motor, vehicle drive motor and/or start-up battery pack.

The present invention relates to a wind turbine blade (10) comprising a shell body with at least one pressure side shell member (36) and at least one suction side shell member (38), and a plurality of shear webs (70) arranged within the shell body. The plurality of shear webs (70) is successively arranged spanwise within the shell body such that adjacent shear webs overlap along part of their spanwise extent (L), wherein a gap (88) in the chordwise direction is provided between adjacent shear webs (70).

A method to reduce noise and vibration between separate blade segments of a jointed wind turbine rotor blade includes determining an actual offset at a chord-wise joint line between the shell members of the first and second blade segments at a load condition on the jointed wind turbine rotor blade, wherein the offset is any one or combination of a flap-wise offset, a twist-wise offset, or a yawl-wise offset. The method defines a modified configuration of the joint structure at a no-load condition on the wind turbine rotor blade that compensates at least partially for the actual offset at the load condition, and the first and second blade segments are connected with the modified configuration of the joint structure.