Investigation of Wind Turbine Blades with Tubercles

Leung, Kelvin

doi:10.4028/www.scientific.net/amr.1051.832

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…During an outdoor trial, a wind turbine equipped with nine blades was affixed to a vehicle to manipulate wind velocities ranging from 1 to 7.5 m per second, evaluating the tubercles' efficiency [149]. It was observed that the tubercled blades exhibited a power increase of 16-30% at wind speeds between 2 and 6.5 m per second.…”

Section: Humpback Whalesmentioning

confidence: 99%

Nature-Inspired Designs in Wind Energy: A Review

Omidvarnia,

Sarhadi

2024

Biomimetics

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The field of wind energy stands at the forefront of sustainable and renewable energy solutions, playing a pivotal role in mitigating environmental concerns and addressing global energy demands. For many years, the convergence of nature-inspired solutions and wind energy has emerged as a promising avenue for advancing the efficiency and sustainability of wind energy systems. While several research endeavors have explored biomimetic principles in the context of wind turbine design and optimization, a comprehensive review encompassing this interdisciplinary field is notably absent. This review paper seeks to rectify this gap by cataloging and analyzing the multifaceted body of research that has harnessed biomimetic approaches within the realm of wind energy technology. By conducting an extensive survey of the existing literature, we consolidate and scrutinize the insights garnered from diverse biomimetic strategies into design and optimization in the wind energy domain.

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Section: Humpback Whalesmentioning

confidence: 99%

Nature-Inspired Designs in Wind Energy: A Review

Omidvarnia,

Sarhadi

2024

Biomimetics

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“…The performance of the tubercles was also affected by the airfoil profile and remained unchanged when the boundary layer became turbulent. Leung (2014) performed a rough outdoor testing of the multiple wind turbine blades with tubercles and reported 16%-30% increase in the power output. Research on the Tubercle Leading Edge (TLE) concept has helped to clarify the aerodynamic issues such as flow separation, tonal noise, and dynamic stall (Aftab et al, 2016).…”

Section: State Of the Art Conceptmentioning

confidence: 99%

Experimental investigations of flow over NACA airfoils 0021 and 4412 of wind turbine blades with and without Tubercles

et al. 2021

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Experimental investigations of wind turbine blades having NACA airfoils 0021 and 4412 with and without tubercles on the leading edge have been performed in a wind tunnel. It was found that the lift coefficient of the airfoil 0021 with tubercles was higher at Re = 1.2×105 and 1.69×105 in post critical region (at higher angle of attach) than airfoils without tubercles but this difference relatively diminished at higher Reynolds numbers and beyond indicating that there is no effect on the lift coefficients of airfoils with tubercles at higher Reynolds numbers whereas drag coefficient remains unchanged. It is noted that at Re = 1.69×105, the lift coefficient of airfoil without tubercles drops from 0.96 to 0.42 as the angle of attack increases from 15° to 20° which is about 56% and the corresponding values of lift coefficient for airfoil with tubercles are 0.86 and 0.7 at respective angles with18% drop.

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“…The primary application of the marine vertebrates and their locomotion was first explored by Dr Frank Fish, to design an efficient wind turbine blade adapting Humpback Whale’s flippers and tubercles, in a Toronto-based company called WhalePower (Leung, 2014). The authors proposed this new design of humpback whale wind turbine blade design and also claimed that their design gives 20 per cent extra annual power production as compared to other existing wind turbine blades, and also has a delayed stall (Fish et al , 2011).…”

Section: Bio-mimicry and Its Applicationsmentioning

confidence: 99%

Designing an efficient tidal turbine blade through bio-mimicry: a systematic review

Kulkarni

Chapman

Shah

et al. 2018

JEDT

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Purpose: A comprehensive literature review is conducted in the tidal energy physics, the ocean environment, hydrodynamics of horizontal axis tidal turbines, and bio-mimicry. Design/methodology/approach: The paper provides an insight of the tidal turbine blade design and need for renewable energy sources to generate electricity through clean energy sources and less CO2 emission. The ocean environment along with hydrodynamic design principles of a horizontal axis tidal turbine blade are described, including theoretical maximum efficiency, Blade Element Momentum theory, and nondimensional forces acting on tidal turbine blades. Findings: This review gives an overview of fish locomotion identifying the attributes of the swimming like lift based thrust propulsion, the locomotion driving factors: dorsal fins, caudal fins in propulsion, which enable the fish to be efficient even at low tidal velocities. Originality/ value: Finally, after understanding the phenomenon of caudal fin propulsion and its relationship with tidal turbine blade hydrodynamics; this review focuses on the implications of bio-mimicking a curved caudal fin to design an efficient Horizontal Axis Tidal Turbine.

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Investigation of Wind Turbine Blades with Tubercles

Cited by 3 publications

References 1 publication

Nature-Inspired Designs in Wind Energy: A Review

Nature-Inspired Designs in Wind Energy: A Review

Experimental investigations of flow over NACA airfoils 0021 and 4412 of wind turbine blades with and without Tubercles

Designing an efficient tidal turbine blade through bio-mimicry: a systematic review

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