A blade for a wind turbine can include an elongated and curved sheet having a curved root, a curved tip, a leading edge, and a trailing edge. The root and the tip can be rotated relative to each other such that the blade is twisted along its length. The root can include an edge having curved projections, the curved projections being distributed along a curvature of the root. A wind turbine can include a mounting element and a plurality of turbine blades. Each turbine blade can be attached to the mounting element closer to the trailing edge than to the leading edge such that an intersection of the leading edge and the root projects upstream from the wind turbine. A wind turbine generator assembly for converting wind into electrical energy can include a wind turbine and a generator. In addition, a support structure can support the wind turbine and generator.

A spiral turbine blade having at least one concave compartment that is rotatable by a moving fluid for the generation of electricity is provided. A spiral turbine blade is aligned so that the axis of rotation is generally parallel to the mean direction of a moving fluid. Attached to the intake-facing side of the at least one spiral turbine blade are concave compartments comprised of an intake void, interior space, and exit void. The concave compartments are oriented to capture an additional range of velocity imaginary vectors; specifically those aligned via vortex inducing elements, such as spiral depressions on a conical intake shroud, thereby augmenting the torque induced the spiral turbine blade, and thus improving the conversion efficiency and electrical energy output.

Aerodynamic element having a cross section in an airflow direction with a suction side surface, a pressure side surface, and a trailing edge extending between the suction side surface and the pressure side surface. The aerodynamic element further comprises an extension body attached to the trailing edge near the suction side surface of the aerodynamic element. A top surface of the extension body is flush with the suction side surface. The aerodynamic element (10) is e.g. applied in a rotor blade for a wind turbine.

An exhaust diffuser for a gas turbine includes an annular duct. A row of struts is arranged in the duct. In a region downstream of the trailing edges of the struts, the cross-sectional area of the duct decreases to a local minimum and then increases again towards the outlet end of the duct. Thereby the gas flow is locally accelerated downstream of the struts. This stabilizes the boundary layer of the flow in this region and leads to a marked increase in pressure recovery for a wide range of operating conditions.

A radial compressor has at least one compressor stage. The compressor stage includes: an impeller having moving blades on a rotor side arranged in a flow channel of the compressor stage. The flow channel is bounded by a hub contour and a housing contour or cover disc contour. Each moving blade has a flow inlet edge and a flow outlet edge. In the region of the compressor stage on the hub contour of the flow channel, initially a curvature change from a first concave curvature into a convex curvature and following this a curvature change from the convex curvature into a second concave curvature is formed; and/or on the housing contour or cover disc contour of the flow channel, initially a curvature change from a first convex curvature into a concave curvature and following this a curvature change from the concave curvature into a second convex curvature is formed.

A wind energy device (10) comprising a plurality of curved blades (14) mounted for rotation about a vertical rotational axis (13). Each of the blades (14) includes a linear inner edge (16), an outer edge (17) and upper and lower edges (18 and 19). The inner edges (16) of each of the blades (14) are located adjacent and parallel to the rotational axis (13) and the upper and lower edges (18, 19) are tapered from adjacent the inner edge (16) such that outer edges (19) of the blades (14) are shorter than the inner edges (16).

Disclosed herein is an array including at least ten wave power converters and at least one marine substation, each wave energy converter including a floating body, a wire, a housing anchored in a seabed or lakebed, the housing including a stator and a seesawing translator. The seesawing translator is connected via the wire to the floating body and each of the at least ten wave power converters is electrically connected to the marine substation. The at least ten wave energy converters are arranged on a symmetric, open, concave line, where a symmetry axis is at least more or less parallel to a primary wave direction and where the marine substation is arranged on the symmetry axis.

Various embodiments of an underwater power generation apparatus are provided. In one embodiment, an underwater power generation apparatus is provided, comprising: a conduit having a bore defined by an interior surface of the conduit, the bore comprising a void extending about a length of the conduit; an exterior cylinder, the conduit oriented within the exterior cylinder, and the conduit rotatable relative to the exterior cylinder; at least three bearings oriented between the conduit and the exterior cylinder; at least one blade having a first blade direction, the at least one blade having a first blade direction oriented on the interior surface of the conduit at a first end of the conduit; and at least one blade having a second blade direction, the at least one blade having a second blade direction oriented on the interior surface of the conduit at a second end of the conduit.

A fan assembly for a dryer appliance is provided. The fan assembly includes an inlet duct that fluidly couples a chamber of the dryer appliance to a fan inlet. The inlet duct includes one or more guide vanes that are configured to direct the air in a manner that improves the pressure rise across the fan, thereby improving appliance performance. For example, the guide vanes may be positioned and oriented to generate a negative pre-swirl of the flow of air, such that the flow of air enters the fan inlet rotating in a direction opposite the direction of rotation of an impeller. Additionally, or alternatively, one or more guide vanes may be positioned and oriented to generate a laminar flow of otherwise turbulent air from the chamber of the dryer appliance.

The application provides a wind power generation system. The application discloses one or several set of power generation units, which generate power by driving the power generation units through the airflow generated by the natural environment or the carrier device, and then the control module outputs the power to the power storage device, and then supplies power to each power-consuming equipment by the diverter connected to the power output terminal of the power storage device, respectively. The internal structure of a turbofan blade of this application has a cavity for repeated impact of airflow, which can utilize a single inlet air to generate several drives to the blades, so that tiny wind can provide more stable power supply for various power-consuming facilities, and the power generation system of this application is less affected by external environmental factors.