Abstract:
A Magnus type wind power generator (A) comprising a horizontal rotary shaft (3) for transmitting torque to a power generating mechanism (2), rotary columns (5) disposed radially of the horizontal rotary shaft (3), driving motors (15) for rotatively driving the respective rotary columns (5) around the axes thereof, in which the relative action between rotation of each rotary column (5) and wind produces Magnus lift, which rotates the horizontal rotary shaft (3) so as to drive the power generating mechanism (2), wherein an air flow means (6) is installed for producing air flows on the outer peripheral surfaces of the rotary columns (5) so as to increase the Magnus lift.
Abstract:
A power generation apparatus comprises a rotor rotatably mounted to a support and a plurality of vanes extending radially out from the rotor and positioned to be engaged by a moving fluid stream. Each vane includes a wing-shaped main blade having leading and trailing edges, and a co-extensive conditioner blade having leading and trailing edges. The conditioner blade is spaced parallel to the main blade so as to define therebetween a slot having an entrance and an exit. A lift-varying device boarders the slot to vary the lift produced by that vane inversely to the speed of the moving fluid stream so that the rotor turns at a relatively constant rate. The rotor, driven by wind or water, may be coupled to the armature of an induction motor/generator to produce electric power.
Abstract:
A power generation apparatus comprises a rotor rotatably mounted to a support and a plurality of vanes extending radially out from the rotor and positioned to be engaged by a moving fluid stream. Each vane includes a wing-shaped main blade having leading and trailing edges, and a co-extensive conditioner blade having leading and trailing edges. The conditioner blade is spaced parallel to the main blade so as to define therebetween a slot having an entrance and an exit. A lift-varying device boarders the slot to vary the lift produced by that vane inversely to the speed of the moving fluid stream so that the rotor turns at a relatively constant rate. The rotor, driven by wind or water, may be coupled to the armature of an induction motor/generator to produce electric power.
Abstract:
A wind power hybrid rotor of a wind power plant for converting wind energy into drive energy is provided. For a utilization of the wind energy in a manner as efficient as possible, a wind power hybrid rotor is provided with a cross-flow rotor, a guide device and a Magnus rotor. The cross-flow rotor is supported so as to be rotatable about a rotational axis and has a plurality of axially extending rotor blades. The guide device has a housing segment partially enclosing the cross-flow rotor in the circumferential direction in such a manner that the cross-flow rotor can be driven by inflowing wind. The Magnus rotor axis is arranged within the cross-flow rotor, and the Magnus rotor axis extends in the direction of the rotational axis. The Magnus rotor has a closed lateral surface and is rotatably driven about the Magnus rotor axis by a drive device.
Abstract:
Rotor platform of aerodynamic force is meant for generating aerodynamic lift force in horizontal position and aerodynamic transverse force in vertical position, with further practical implementation as a robust power installation of transport vehicle facilities.The principle of operation of the platform is based on the well-known Magnus effect—generation of transverse force acting on an object spinning in the ambient air flow. The basis of the construction is the unit of several coplanar rotors, wherein the rotors spinning is caused by the air flow force and the rotors provide the summed value of the generated aerodynamic to force.
Abstract:
Power generation apparatus includes a wing-shaped blade having opposite sides, opposite ends and leading and trailing edges extending between those ends. A lift differential producing device in the blade produces a lift differential at the opposite sides of the blade and that device is switched so that one blade side or the other produces the greater lift. A blade shaft extends along an axis in the blade that is in close parallel relation to the leading edge of the blade and that shaft is fixed to move with the blade. Supports support the blade shaft so that the blade can be positioned in a fluid stream with the leading edge facing upstream and swing about the axis between first and second extreme positions on opposite sides of a neutral position, the blade shaft oscillating with the blade. A coordinating device coordinates the switching of the lift differential producing device with the swinging of the blade so that the switching occurs at the extreme positions of the blade. A method of generating power using the apparatus is also disclosed.
Abstract:
According to some embodiments, a plurality of airborne bodies may each extend horizontally along an axis between a first point and a second point. Each body may be, for example, at least partially filled with a gas and two or more vanes may be provided airborne with each body such that the vanes, when acted upon by a wind force perpendicular to the axis, are operable to cause rotation about the axis. Moreover, one or more electrical generators may be airborne with each body to convert rotational energy produced by the rotation about the axis into electrical energy.
Abstract:
According to some embodiments, an airborne body extends horizontally along an axis between a first point and a second point. The body may be, for example, at least partially filled with a gas. Two or more vanes may be provided airborne with the body such that the vanes, when acted upon by a wind force perpendicular to the axis, are operable to cause rotation about the axis. Moreover, one or more tethers may be coupled to anchor the body to a third point, and one or more electrical generators may be airborne with the body to convert rotational energy produced by the rotation about the axis into electrical energy. According to some embodiments, each vane comprises a horizontal blade panel attached to and extending along the body.
Abstract:
The invention herein described consists of a system destined to harness wind resources, transferring wind power to the ground station group on the surface, the process being performed through the tensioning and unwinding of the cable group connecting the airborne group to a reeler in the said ground station group. Through the control group the resultant force vector of the aerodynamic forces tensioning the cable can be significantly altered. This change in aerodynamic forces can be done in order to create two different phases which define the cyclic movement performed by the system: a work phase, where the resultant force vector is of greater magnitude and tensions the cable, unwinding it at the ground station group and thus producing power; and a recovery phase (which requires power from the system) when the cable is rewound in order to bring the airborne group back to its original position. Because the work produced in the work phase is of greater magnitude than the work required during the recovery phase, the system generates positive net power, which can then be introduced in the electrical grid, or stored as any other form of energy such as chemical or mechanical.
Abstract:
Roughness is added to the surface of a bluff body in a relative motion with respect to a fluid. The amount, size, and distribution of roughness on the body surface is controlled passively or actively to modify the flow around the body and subsequently the Vortex Induced Forces and Motion (VIFM). The added roughness, when designed and implemented appropriately, affects in a predetermined way the boundary layer, the separation of the boundary layer, the level of turbulence, the wake, the drag and lift forces, and consequently the Vortex Induced Motion (VIM), and the fluid-structure interaction. The goal of surface roughness control is to increase Vortex Induced Forces and Motion. Enhancement is needed in such applications as harnessing of clean and renewable energy from ocean/river currents using the ocean energy converter VIVACE (Vortex Induced Vibration for Aquatic Clean Energy).