Lift Enhancement for Wind Turbines

Wind turbine blade design that improves power generation and lift by reducing vorticity downstream. The blade has an increasing chord towards the tip, changing twist angle, and/or thickness along the length. This creates counter-rotating vortices behind the blade for higher efficiency. The chord has a local minimum, max closer to the tip, and inflection points. The twist has min, max closer to tip. The blade shape reduces vorticity and increases lift compared to conventional designs.

Source

Horizontal axis wind turbine blade design that improves efficiency at high speeds. The blade has an airfoil section with a double-sided lift profile that allows it to maintain lift and generate power at supersonic speeds. The airfoil has a unique shape where the upper and lower edges intersect directly instead of forming a gap. This prevents separation and stall at high speeds. The blade also has a shock wave management system to reduce damage and noise at supersonic speeds. The shock wave angles are calculated to reduce windward side speeds without generating shocks. This enables the blade to operate efficiently at very high wind speeds.

Source

Vertical axis wind turbine with blunt trailing edge airfoils to improve power generation efficiency of lift-type vertical axis wind turbines. The blades have symmetrical airfoils with thickened trailing edges. The trailing edge thickness is 3% of the chord length. This blunt trailing edge shape reduces flow separation and improves lift compared to traditional pointed trailing edges, especially at high tip speeds. It does not require active flow control methods or auxiliary devices.

Source

Wind turbine blade with added Gurney flaps near the trailing edge that improve lift without significantly increasing drag. The flaps are mounted on the pressure or suction side of the blade in the outer third of the span. They have a height of 0.1-0.5% of the chord length and are angled 1-30 degrees to the chord. This configuration provides lift boost without drag penalty compared to traditional Gurney flap positions. Using two different sized flaps on inner and outer sections further improves blade performance.

Source

Wind turbine blade attachments to improve aerodynamics and power generation. The attachments are flow-guiding devices like spoilers or Gurney flaps. The devices are attached to the blade surface with flexible housings filled with adhesive. This allows bonding without grinding or complex prep steps. The attachments are also positioned in triangles to distribute loads, curved to accommodate blade bending, and reinforced with ribs for stiffness.

Source

Vertical axis wind turbine with improved aerodynamics and energy conversion efficiency compared to conventional vertical axis wind turbines. The turbine has airfoil blades with localized moving surfaces that extend 70% of the chord length from the leading edge. This band of moving surface reaches maximum speed of 7 times the incoming wind speed. This design suppresses flow separation and improves lift at low tip speeds. The moving surface has a tubular motor at the end to generate power. The turbine also uses an angle sensor to monitor blade rotation and optimize performance.

Source

Lift-type vertical axis wind turbine with partial moving surface blades that improves wind energy conversion efficiency without requiring external energy injection. The blades have moving surfaces 70% of chord length from the leading edge that reach 7 times wind speed. This partial moving surface design suppresses flow separation at low tip speeds while avoiding excessive energy consumption at high speeds compared to full surface active control. The moving surfaces are connected to tubular motors inside the blades for active control.

Source

Wind turbine blade design with improved aerodynamics using vortex generators with airfoil shapes. The vortex generators are installed on the suction surface of the blade to prevent flow separation and improve blade performance. The vortex generators have an airfoil shape with a curved top and horizontal tip. The airfoil shape reduces drag compared to a flat vortex generator. The curved top creates turbulence to delay flow separation, while the horizontal tip reduces separation at the blade tip. This improves lift and reduces drag compared to flat vortex generators.

Source

A wind turbine blade design with a rotating winglet at the tip to improve efficiency by reducing turbulence and increasing lift. The blade tip winglet can rotate relative to the blade body, allowing it to move into an optimal position for capturing wind energy. This reduces interference from blade tip turbulence and improves lift. The winglet rotation is driven by internal mechanisms housed in cavities at the winglet and blade tips.

Source

Wind turbine blade design with rotating tip winglets to improve blade efficiency and power output. The blade has a rotatable winglet attached to the tip. The winglet can rotate independently from the main blade body. This allows the winglet to move into a position that reduces turbulence at the blade tip. By reducing turbulence, the lift of the blade can be increased, enabling more efficient energy extraction from the wind. The winglet rotation is driven by mechanisms inside the blade tip and main body cavity.

Source

A lifting device for wind turbine blades during installation that automatically stabilizes the blade orientation in windy conditions. The device uses sensors on the lifting yoke to measure blade position and rotation. A controller analyzes the sensor data and commands a pitching device on the yoke to rotate the blade if it starts moving too much due to wind forces.

Source

Wind turbine blade design to improve aerodynamics and energy production. The design includes attaching flow-modifying devices like spoilers or Gurney flaps to the surface of the blade. The devices are attached with flexible housings filled with adhesive to bond them to the blade surface. This allows the devices to modify airflow and increase lift without compromising blade structural integrity.

Source

A wind turbine design that can capture both horizontal wind and valley winds to improve efficiency compared to conventional horizontal axis wind turbines. The turbine has horizontal blades connected around the hub, and vertical blades extending down from the hub. The vertical blades capture valley winds while the horizontal blades capture horizontal winds. The blades are pitched independently to optimize performance for each wind direction. This allows capturing more wind energy from both horizontal and vertical flows, increasing the overall conversion rate of wind energy.

Source

A wind turbine blade design with a flap at the root to increase lift force. The flap is located near the blade root where wind speeds are lower due to the smaller rotation radius. This allows the blade to generate more lift at low wind speeds, improving overall efficiency. However, the flap also adds drag, so it is not used at high wind speeds due to safety concerns.

Source

Wind turbine blade design with a sliding flap at the leading edge to increase lift and power generation at low wind speeds. The blade has a section with a cutout at the leading edge that forms a flap. The flap is slidably connected to the blade airfoil section. A hydraulic cylinder moves the flap to adjust the blade shape at low wind speeds. This increases the curvature and windward area of the airfoil sections to capture more energy. The flap retracts at higher wind speeds to restore the blade shape.

Source

Optimizing the performance of large wind turbine rotor blades by using split blades with vortex generators that prevent flow separation while minimizing drag. The blades have a separation point along the length and inner and outer sections. The vortex generator extends from the separation point towards the tip. The key is keeping the ratio of the vortex generator's outer length to the total blade length below 0.25 to avoid excessive drag. This allows preventing flow separation near the hub without adding excessive drag.

Source

Airfoil shape for wind turbine blades that improves lift, stall angle, and drag compared to conventional wind turbine airfoils. The airfoil has a unique cross-section with sections named S1-S5. The upper surface transitions smoothly from trailing edge to leading edge (S2) and then has excessive curvature (S3). The lower surface has a concave shape (S5) with larger camber than conventional airfoils (S809). This design ensures small angle of attack lift, inhibits separation at high angles, and improves lift and drag compared to conventional airfoils.

Source

Low Reynolds number blade airfoil for wind turbines in low wind speed areas. The airfoil is optimized for low Reynolds numbers, which is important for small wind turbines in areas with lower wind speeds. The airfoil has a unique shape with a cambered pressure surface and a slightly cambered suction surface. This provides a higher lift-to-drag ratio compared to traditional aviation airfoils in low Reynolds numbers. The cambered pressure surface reduces pressure drag, while the cambered suction surface reduces separation and vortices. The airfoil has a maximum relative bending of 6.34-8.69% at 39.5% chord length.

Source

A high-lift wind turbine airfoil shape that improves the aerodynamic performance of wind turbines at low wind speeds. The airfoil has an S-shaped arc with a concave front section and convex rear section. It has a specific thickness distribution and section lengths. The arc intersects the chord line at 0.46 units, the maximum thickness is at 0.349 units from the leading edge, and the trailing edge angle is 13.36 degrees. The S1 section length is between 0 and 0.39 units, S2 is between 0.39 and 0.85 units, S3 is between 0.85 and 1.0 units, S4 is between 0.32 and 1.0 units, and S5 is between 0 and 0.32 units.

Source

A blade power increasing device for wind turbines that improves the aerodynamic performance and power output of wind turbine blades. The device is an airfoil-based blade power increasing device that includes an airfoil main body and an airfoil power increasing device. The power increasing device is installed near the trailing edge of the airfoil main body, specifically at a position where the relative thickness of the airfoil is between 18% and 60% of the blade thickness. This installation location increases lift coefficient while slightly increasing drag coefficient, resulting in a better lift-to-drag ratio and improved blade power compared to the original airfoil.

Source

A flexible trailing edge extender for wind turbine blades that improves aerodynamic performance without adding weight and cost. The extender is a flexible aeroshell piece that can be attached to the trailing edge of a wind turbine blade section. The extender piece has slits cut into it that allow it to bend and flex. This configuration allows the extender to withstand operational stresses and strains better than a rigid extender.

Source

A wind turbine rotor blade with improved aerodynamics to increase lift and reduce drag, noise, and vibration. The blade has an airfoil shape with a flat-back trailing edge extension that attaches to the suction side surface. This extension modifies the flow around the blade to improve its performance. The trailing edge extension is flush with the airfoil surface and can be adjustable using an actuator.

Source

A wind power generation system with increased efficiency. It has a clutch to disconnect the generator when wind speed is low to prevent rotor stalling. A brake is used to stop the rotor when wind speed is too high. An anemometer, speed detector, and control device manage these actions. The rotor blades are designed with tilted parts to increase lift using the Coanda effect.

Source

A wind turbine rotor design with double blades to extract more power from wind than conventional single-bladed rotors. The rotor has three double-bladed blades spaced at 120 degrees. Each blade has an aerodynamic profile with a smoothed torsional angle along its length. This reduces loads at the blade tips as the radius increases. By doubling the blade surface area and using an optimized profile, the rotor can capture more wind energy compared to a single-bladed rotor of the same size.

Source

Wind turbine blade design with a slender profile and thicker section near the root for maximum energy output, reduced bearing loads, and easier transportation. The blade has a circular or elliptical root section closest to the hub, a thicker airfoil section farther from the hub, and a transition region between. A shoulder in the airfoil section further increases thickness. This allows a slender blade with high lift and low drag at the tip, while still providing enough strength and space for internal components at the root.

Source

An airfoil-based blade power increasing device for wind turbines that improves blade aerodynamics and power generation without sacrificing structural safety. The device involves adding a thin power-augmenting section near the blade trailing edge. This section is installed on the suction or pressure surface of the blade airfoil. It has a thickness of 10-25% relative to the blade chord length. The augmenting section is positioned close to the trailing edge, 0-35% chord length back. This localized power augmentation near the blade tip improves lift and reduces drag compared to thicker airfoils.

Source

High-lift wind turbine airfoil design to improve the performance of wind turbines at low wind speeds. The airfoil is based on the S809 airfoil profile but with modifications to prevent airflow separation and stalling. It has an S-shaped arc section with a concave front and convex rear. This arc connects the S809 profile at the trailing edge. The arc has specific lengths and thickness locations to balance lift and drag at low angles of attack. The airfoil aims to provide higher lift at low wind speeds compared to the S809 airfoil.

Source

A wind turbine system with multiple rotors that mitigates dynamic loads using individual pitch control of each rotor blade. This allows optimizing blade pitching to counteract gravity forces and reduce dynamic loads. The pitch adjustment system can receive lift commands from a control system that calculates the required blade pitching to generate lift opposite to gravity on each rotor module. This balances the forces and reduces vibration. The control system can use load estimates to optimize blade pitching and reduce loads further.

Source

Arrangement of vortex generators on a wind turbine blade that improves aerodynamic performance over the state of the art. The vortex generators are arranged in pairs with specific ratios.

Source

Wind turbine blades with pneumatic aerodynamic control to improve efficiency and simplify design. The blades have slots on the suction side through which pressurized air can be blown to adjust lift, drag, and moments. This allows control of blade forces and performance without mechanical pitch adjustment. The blades also have slots to induce flow separation and braking when needed. The pneumatic control provides load, power, and safety regulation from low to high wind speeds. The blowing slots can be supplied with air from internal cavities using centrifugal pumping.

Source

Wind turbine design with improved aerodynamics to maximize power generation efficiency. The key features are: 1. Blades with rounded tips and overall curved shape to reduce tip vortices and improve lift. 2. Wing supports that extend horizontally from the blade tip to the rotor center. The support joint at the blade tip is larger than the blade tip cross-section to avoid protrusions disrupting airflow. This prevents tip vortices and allows cleaner airflow over the blade. 3. Streamlined support shapes to reduce drag and vortices. 4. Support shapes that curve from the center to blade side to minimize airflow interference. 5. Rearward-convex support shapes to induce vortices that reduce rotational resistance.

Source

Flow turbine rotor with twisted blades for vertical axis wind turbines that improves efficiency by optimizing blade twist. The rotor has blades with smaller twist angle near the midpoint compared to the top and bottom. The twist angle at 1/4 height is less than 20% and 30% less than the twist at 1/2 height. This reduces drag and improves lift compared to uniform twist. The total twist along the blade length should be at least 90% of the full angle divided by the number of blades.

Source

Wind turbine blade with a trailing edge flap to increase lift without significantly increasing drag. The flap has two sections with an angled orientation. The first section extends from the trailing edge with an obtuse angle between its upstream surface and a plane parallel to the blade chord. The second section extends from the first section and together they form a concave profile.

Source

Spiral wind turbine with auxiliary winglets that improves wind energy capture by increasing the utilization rate of wind resources. The spiral turbine has main blades and auxiliary winglets connected to the hub via support arms. This configuration allows the auxiliary winglets to be positioned optimally relative to the main blades. It improves the turbine's wake and extracts more energy from the wind by absorbing it from different directions and angles. The spiral blade shape further enhances aerodynamic performance.

Source

A wind turbine blade design with improved performance and reduced cost compared to conventional blades. The blade has a unique shape with a wider, flatter section near the root and a narrower, curved section toward the tip. This shape allows the blade to generate more torque and thrust at lower wind speeds, reducing the required wind speeds for the turbine to operate efficiently. It also enables shorter, more compact blades compared to traditional designs.

Source

A power increasing structure for wind turbine blades with blunt trailing edges to improve aerodynamic performance. The structure involves adding an aerodynamic element to the blunt trailing edge of the blade. This element has a thickness that extends beyond the blade's base thickness at the trailing edge. The element can be made of a core material like foam or filled with fiberglass cloth. It creates a dovetail shape at the trailing edge. This modified trailing edge with the added aerodynamic element helps to generate more power by altering the airflow around the blade and preventing flow separation.

Source

Wind turbine blade design to reduce load variations and improve efficiency. The blades have airfoils with reduced chord lengths compared to conventional blades. This reduces lift variation and loads compared to conventional blades. The reduced chord is achieved by using airfoils with higher maximum lift coefficients and designing the rotor to operate at lower average angles of attack. This allows equal lift at lower chords. The reduced chord blades also enable operation above cut-out speeds without stalling.

Source

Vertical axis wind turbine design that improves efficiency and self-starting capability compared to traditional vertical axis turbines. The turbine has blades with airfoil sections that expand in a logarithmic spiral shape from the hub to the tips. This configuration increases lift and torque compared to uniform blade sections. The blades also have features like slits, vortex generators, dogtoots, and winglets to further enhance lift and reduce tip vortices. The blades can be made of stretchable materials to collapse for transportation. The turbine can also be connected in stages with contra-rotating generators to double power output.

Source

Horizontal axis rotor blade design for wind and water turbines that allows efficient rotation at low speeds with reduced risk of blade breakage. The blade has a curved forward tip section with a thickened front edge. The chord length gradually increases from base to tip. This shape captures air flow and generates lift force. The thickened front edge prevents blade stall and separation. The curved inner surface of the forward tip has a larger radius than the outer surface. This shape moves air diagonally backward and provides lift. The rear surface of the base section is orthogonal to the axis, gradually inclined toward the rear, and thicker at the base. This shape reduces centrifugal forces at the tip. The blade geometry balances lift, centrifugal forces, and air flow for efficient rotation.

Source

Wind turbine blade design with improved wind energy capture. The blade has an expansion wing near the root and a tip winglet. The expansion wing has a pressure surface that gradually dents downward from the outside to the inside. This design feature allows the blade to capture more wind energy by increasing airflow attachment over the wing root and preventing separation. The expansion wing and tip winglet further enhance lift and reduce drag compared to a standard winglet.

Source

A new blade design for wind turbines that improves wind energy capture and reduces turbulence. The blade has a spoiler on the root to reduce vortex formation and separation. It also has a bendable tail that suppresses tip turbulence. These features enhance blade aerodynamics and lift to improve wind energy absorption.

Source

A wind turbine blade with a longitudinal flow guidance device to improve aerodynamic performance. The device extends along the blade surface and has a plate-shaped element at an angle towards the leading edge. This protruding element guides the flow and increases lift compared to a flat surface. The device prevents separation and maintains pressure for higher efficiency. The plate-shaped element can protrude from one side or an intermediate point. The device can extend at least 1 meter along the blade.

Source

Low wind speed high performance wind turbine blade designed to extract more power from low wind areas compared to conventional blades. The blade has a unique chord length profile along the span. It starts with a gradually increasing chord length in the first 5 sections, followed by a gradually decreasing chord length from section 6 to the tip. This profile aims to optimize lift and drag forces at low wind speeds, improving the blade's efficiency in low wind areas compared to conventional blades.

Source

Wind turbine blade design with vortex generators to improve blade efficiency and extend blade life. The blade has vortex generators on the suction side near the trailing edge. The vortex generator placement is optimized to reduce separation and improve aerodynamics without increasing induced drag. The vortex generators are arranged in pairs along a concave line close to the blade root and mid-chord. This position moves the separation point toward the trailing edge, preventing or minimizing separation on the suction side.

Source

Lift-type vertical axis wind turbine with partially swept blades to improve the aerodynamic efficiency of small vertical axis wind turbines. The turbine has a vertical axis with a generator, a cross arm support rod, a tower pole, and a partially swept blade. The blade has a straight segment connected to the cross arm and symmetric sweeping segments at the ends. This blade shape provides a balance between the lift-generating straight segment and the sweeping segments for better aerodynamic performance in low wind speed, turbulent conditions common in distributed wind farms.

Source

Rotor blade design for wind turbines that allows larger blades to extract more power from the wind without increasing noise levels. The blade has a unique thickness profile with spines extending from the airfoil's suction side. These spines create a separation zone between them that prevents turbulent flow separation. This reduces noise compared to conventional blades with thicker sections. The spines allow the blade to have a thicker profile at the root without increasing drag. The blade can operate at lower speeds of up to 0.06 Mach without flow separation. The thicker root section provides increased stiffness for larger turbines.

Source

A device for lifting and handling wind turbine blades without damaging the aerodynamic surfaces. The lifting device has a chassis with connection points for attaching to cranes. It also has adjustable features like pivoting arms, tracks with weights, and load cells to balance the weight of the blade being lifted. This allows precise control of the lifting point and center of gravity to prevent imbalance and blade damage during installation. The device can be adjusted while suspended from the crane using hydraulic actuators, power packs, and remote controls.

Source

A family of thick airfoil designs for the inner and root sections of large wind turbine blades that have higher lift coefficients and improved lift-to-drag ratios compared to conventional thick airfoils. The thick airfoils have relative thicknesses of 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, and 0.70. The airfoils have back-bending camber lines with pressure surfaces that don't intersect with their spines due to the thicker trailing edges. This allows the airfoils to have higher lift at higher angles of attack. The thicker airfoils are beneficial for long blades with large root torsion angles to avoid flow separation and stall. They also reduce blade torsion, weight, and cost by allowing smaller

Source

A vertical axis wind turbine blade airfoil shape designed specifically for vertical axis wind turbine blades to improve lift, stall characteristics, and insensitivity to roughness compared to conventional aircraft airfoils. The blade airfoil has a thicker profile, rounded leading edge, and a unique pressure surface shape that reduces sensitivity to roughness, improves stall behavior, and maximizes lift compared to traditional thin airfoils.

Source

Wing and wind turbine design that can generate torque from winds blowing parallel or perpendicular to the rotation axis. The wing has a streamlined cross section with continuously changing thickness, curvature, and mount angle. This allows torque generation from winds in either direction. The wings are mounted around the turbine shaft in a rotationally symmetric configuration. The curved shape of the wings reduces separation and drag compared to flat plates. The variable curvature and mount angle provide lift and torque in both wind directions.

Source