Aerodynamic benefits of flexible morphing airfoil for SUAV

Thangeswaran, Rajesh Senthil Kumar; Venkateswaran, Swathi; Kalaiselvan, Thayalan; Aravindan, P.; Venugopal, Sivakumar

doi:10.1063/1.5120189

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Nowadays, advances in smart technologies have enabled such needs to be satisfied. Wing morphing is used in the aerospace industry to improve the aerodynamic efficiency and adaptability of aircraft [4][5][6][7][8], helicopters [9][10][11][12], micro air vehicles [13][14][15][16][17] and unmanned air vehicles [18][19][20][21]. In contrast, the blades of wind turbines operate at relatively low wind speeds with a low level of risk.…”

mentioning

confidence: 99%

Towards Smart Blades for Vertical Axis Wind Turbines: Different Airfoil Shapes and Tip Speed Ratios

Tirandaz

Rezaeiha²,

Micallef³

2022

Preprint

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Abstract. Future wind turbines will benefit from state-of-the-art technologies that allow them to not only operate efficiently in any environmental condition, but also to maximize the power output and cut the cost of energy production. Smart technology, based on morphing blades, is one of the promising tools that could make this possible. The present study serves as a basis for identifying morphing airfoils as functions of azimuthal angle and tip speed ratio for vertical axis wind turbines. The focus of this work is on the combined analysis of three airfoil shape-defining parameters, namely the maximum thickness t/c and its chordwise position xt/c as well as the leading-edge radius index I. A total of 126 airfoils are generated. The analysis is based on 630 high-fidelity transient CFD simulations, validated with three experiments. The results show that with increasing λ, the optimal maximum thickness decreases from 24 %c to 10 %c, its chordwise position shifts from 35 %c to 22.5 %c, while the corresponding leading-edge radius index remains at 4.5. The results show an average improvement of nearly 0.06 in CP for all the values of λ.

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mentioning

confidence: 99%

Towards Smart Blades for Vertical Axis Wind Turbines: Different Airfoil Shapes and Tip Speed Ratios

Tirandaz

Rezaeiha²,

Micallef³

2022

Preprint

View full text Add to dashboard Cite

show abstract

Estimating the Aerodynamic Coefficients of Membrane Wings Using Wind Tunnel: A Machine-Learning Approach

Hadipour-Gudarzi,

Ekhtiyari,

Sefid

2023

Iran J Sci Technol Trans Mech Eng

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Towards smart blades for vertical axis wind turbines: different airfoil shapes and tip speed ratios

Tirandaz,

Rezaeiha,

Micallef

2023

Wind Energ. Sci.

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Abstract. Future wind turbines will benefit from state-of-the-art technologies that allow them to not only operate efficiently in any environmental condition but also maximise the power output and cut the cost of energy production. Smart technology, based on morphing blades, is one of the promising tools that could make this possible. The present study serves as a first step towards designing morphing blades as functions of azimuthal angle and tip speed ratio for vertical axis wind turbines. The focus of this work is on individual and combined quasi-static analysis of three airfoil shape-defining parameters, namely the maximum thickness t/c and its chordwise position xt/c as well as the leading-edge radius index I. A total of 126 airfoils are generated for a single-blade H-type Darrieus turbine with a fixed blade and spoke connection point at c/2. The analysis is based on 630 high-fidelity transient 2D computational fluid dynamics (CFD) simulations previously validated with experiments. The results show that with increasing tip speed ratio the optimal maximum thickness decreases from 24 %c (percent of the airfoil chord length in metres) to 10 %c, its chordwise position shifts from 35 %c to 22.5 %c, while the corresponding leading-edge radius index remains at 4.5. The results show an average relative improvement of 0.46 and an average increase of nearly 0.06 in CP for all the values of tip speed ratio.

show abstract

Aerodynamic benefits of flexible morphing airfoil for SUAV

Cited by 3 publications

References 7 publications

Towards Smart Blades for Vertical Axis Wind Turbines: Different Airfoil Shapes and Tip Speed Ratios

Towards Smart Blades for Vertical Axis Wind Turbines: Different Airfoil Shapes and Tip Speed Ratios

Estimating the Aerodynamic Coefficients of Membrane Wings Using Wind Tunnel: A Machine-Learning Approach

Towards smart blades for vertical axis wind turbines: different airfoil shapes and tip speed ratios

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