Biomimetic Blade Designs Reduce Wind Turbine Noise

Bionic wind turbine blade design that reduces noise without sacrificing aerodynamic performance. The blade has a non-smooth leading edge and a curved sawtooth trailing edge, especially at the middle to end sections of the blade. This bionic shape inspired by owl wings and feathers aims to significantly reduce aerodynamic noise generated by wind turbine blades while maintaining aerodynamic efficiency. The non-smooth leading edge and curved serrated trailing edge are applied to the noise source areas near the blade mid-span.

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Wind turbine blade design to reduce vibrations and improve efficiency by borrowing from nature. The blade has a bionic airfoil shape based on a cuckoo wing cross-section, and a V-shaped stripe pattern on the web surface inspired by cuckoo feathers. This coupled design suppresses blade flutter and reduces vibration displacement. The bionic airfoil improves lift and reduces drag, while the V-shaped stripes absorb vibration energy and hinder deformation. It allows higher loads and improves blade life.

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Bionic wind turbine blade design inspired by shark fins to improve aerodynamic performance. The blade has a line flap resembling a shark's fin at the trailing edge. The flap width is 0.2% of the blade chord length and height is 2% of the chord length. This bionic feature increases lift by enhancing the pressure differential between the blade suction and pressure surfaces. It improves blade performance without significant drag increase.

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A bionic design for wind turbine blades that improves lift force and aerodynamic performance with reduced drag compared to conventional blades. The bionic design adds an arc-shaped fin flap to the trailing edge of the blade inspired by shark tails. The fin tapers gradually from the front to the back and has a streamlined shape. This fin profile increases the pressure difference between the suction and pressure surfaces, boosting lift force without significantly increasing drag.

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Retrofitting wind turbine blades with bionic aerodynamic shrapnel to improve blade performance and delay stall. The shrapnel is shaped like a whale tail fin and attaches to the blade suction surface between 50-70% of the chord length. The shrapnel angle is 22-45 degrees to the blade contour. Its length in the chord direction is 10-13% of the chord. The shrapnel bounces at high angles to prevent separation, but doesn't disrupt flow at low angles.

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Bionic trailing edge wind turbine blade design to reduce noise and vibrations. The design involves adding a whale tail fin-shaped flap at the base airfoil blade trailing edge that can be adjusted based on the separation point position. The flap is symmetrically distributed on both sides of the blade suction surface and pressure surface. This bionic trailing edge modification mimics the shape of whale tails and aims to reduce noise and vibrations during wind turbine operation.

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Axial fan blade design that reduces power consumption and noise compared to conventional blades. The blade trailing edge is modified using bionic features inspired by fish tails and bird wings. The modification involves a V-shaped concave section with an angle of 145-175 degrees cut into the blade. Further away from the blade hub, a zigzag sawtooth section like a bird's wing is added. This bionic profile reduces tip leakage flow and wake compared to a straight trailing edge. The blade design improves load distribution, reduces power, and noise.

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Wind turbine blade design that improves efficiency by combining a biological airfoil inspired by cuckoo wings with herringbone grooves. The bionic blade shape is reconstructed from cuckoo wing cross-sections. Then herringbone grooves are designed based on the reconstructed blade. This coupling increases pressure difference between the blade surfaces, boosting efficiency. The biological airfoil and herringbone blade design enhances wind turbine power generation compared to conventional blades.

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A low-noise wind turbine blade design inspired by bird wings to reduce aerodynamic noise while maintaining performance. The blade has a bionic airfoil shape and a sawtooth trailing edge. The bionic airfoil mimics bird wing shapes for efficient lift and reduced drag. The sawtooth trailing edge reduces turbulence and noise compared to a conventional straight edge. This bionic blade design aims to solve the tradeoff between noise reduction and aerodynamic performance in wind turbine blades.

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Bionic wind turbine blade design inspired by cuckoo wings for higher efficiency and power generation. The blade lacks a smooth leading edge like traditional blades, instead it has a non-smooth structure like cuckoo wings. The blade also uses a bionic airfoil shape. This design based on cuckoo wing characteristics provides a 17.7% increase in power coefficient compared to standard wind turbine blades at high tip speeds.

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Bionic blade design for wind turbines that reduces noise and improves efficiency. The blade has a unique shape formed by stacked iron-shaped line units. The blade body is made of these units arranged perpendicular to the blade length. Each unit has curved sides with parallel ends connected by a circular arc. The smaller end is the symmetry plane. This shape reduces airflow impact and stall. The blade also has multiple rows of wings along its length and a trailing edge brush. These features improve wake flow, reduce noise, and enhance efficiency compared to conventional blades.

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Paddles for hydraulic turbines inspired by the tail fin of the black marlin fish to improve efficiency in wave energy conversion. The paddle shape mimics the contour of the black marlin's tail fin. This bioengineering model has been found to increase turbine rotation rates compared to traditional paddle designs. The paddles are used in submersible turbines for wave energy extraction as part of a larger system that generates renewable electricity from waves, wind, and solar.

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Bionic axial flow wind wheel design that improves efficiency and reduces noise compared to conventional wind wheels. The bionic design takes inspiration from bird wings. The blade has a deflected portion near the tip that angles away from the blade pressure surface. This deflection reduces separation and flow separation noise. The blade also has a continuous convex structure on the trailing edge that converges the flow. This reduces eddy currents and noise. The blade profile has a maximum thickness near the leading edge to further reduce flow resistance.

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Bionic blade design for horizontal axis wind turbines that improves efficiency by mimicking the aerodynamics of bird wings. The blade has a V-shaped groove on the suction surface, modeled after the wing structure of cuckoos. The groove size is determined by geometric similarity based on the bird wing dimensions. The groove is 38% the blade length, 18% from the leading edge, and 20mm spacing between adjacent grooves at the trailing edge. The V-shaped grooves on the blade mimic the vortex generating wing features of cuckoos to improve aerodynamics and reduce turbulence.

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Wind turbine blade design with a non-smooth leading edge to delay stall angle and improve aerodynamics. The blade has a bionic shape inspired by bird wings. The leading edge is not smooth but has a non-symmetric, serrated profile with jagged edges. This design aims to mimic the natural shape of bird wings and delay the onset of blade stall at high angles of attack. The blade with the bionic leading edge has better lift-drag ratio compared to a conventional smooth leading edge blade, especially at high angles of attack.

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Bionic wind turbine blade design inspired by the wings of cuckoo birds. The blade has a non-smooth leading edge with jagged protrusions like cuckoo feathers, as well as a cross-sectional airfoil shape based on cuckoo wings. This bionic blade design aims to improve wind energy conversion efficiency and power generation compared to standard wind turbine blades. The jagged leading edge and unique airfoil shape are inspired by cuckoo bird wings which have been evolved to capture more airflow and reduce drag.

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Blades for vertical axis wind turbines and horizontal axis hydraulic turbines that are inspired by natural shapes for improved efficiency. The blades have specific geometries optimized through simulation based on nature-inspired designs. For vertical axis wind turbines, the blades are radially arranged on a central disc. For horizontal axis hydraulic turbines, the blades are on a central vertical disk.

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Bionic vertical axis wind turbine with improved automatic start performance and power output compared to traditional vertical axis wind turbines. The turbine uses blades with airfoil sections that have a blade body and a winglet attached. The winglet is a shorter airfoil section attached to the end of the blade. The blade and winglet combination improves the turbine's ability to start automatically in low wind speeds and generate more power compared to a single blade. The winglet provides additional lift and reduces stall at low speeds. The blade and winglet spacing needs to be optimized for the best balance between start performance and power output.

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A 100W wind turbine blade with an airfoil shape inspired by marine animals like dolphins and humpback whales. The blade uses a modified airfoil section that improves efficiency compared to standard wind turbine blades. The sea-inspired airfoil has a larger thickness and camber than traditional blades. This design increases lift and lift-drag ratio, allowing higher efficiency at lower angles of attack. It provides significant gains in wind turbine performance without changing blade processing.

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A small wind power generator blade design that improves the efficiency of small wind turbines by using bionic inspiration and optimized parameters. The blade has an airfoil shape inspired by bird wings, with a specific coordinate equation. The blade also has an angled installation orientation and increased chord length to enhance lift and reduce drag. These modifications compared to standard blades resulted in efficiency improvements of 26-48%.

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