Review of aerodynamic developments on small horizontal axis wind turbine blade

Karthikeyan, N.; Murugavel, K. Kalidasa; Kumar, Sourabh; Rajakumar, S.

doi:10.1016/j.rser.2014.10.086

Cited by 97 publications

(45 citation statements)

References 30 publications

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“…These performance improvements of the new airfoils are due to the optimal t/c employed in their design. The zone for the t/c between 0.85 and 1.50 leads to the development of relatively thin and cambered designs which are generally known as features that improve airfoil aerodynamic performance [23,45,46].…”

Section: Airfoil Performance Summarymentioning

confidence: 99%

“…Under this low Re condition, improperly designed blade airfoils encounter deterioration in aerodynamic performance which adversely affects the operating efficiency of the wind turbine [18][19][20][21]. As such, airfoils designed for large-scale wind turbines are not necessarily suitable for small-scale wind turbines [19,20,22,23]. The airfoil aerodynamic parameters of interest in low wind speed airfoils are the lift-to-drag ratio (L/D), lift coefficient, stall angle, stall performance, and drag bucket performance [22,[24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Development of High Performance Airfoils for Application in Small Wind Turbine Power Generation

et al. 2020

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Small wind turbine power generation systems have the potential to meet the electricity demand of the residential sector in developing countries. However, due to their exposure to low Reynolds number (Re) flow conditions and associated problems, specific airfoils are required for the design of their blades. In this research, XFOIL was used to develop and test three high performance airfoils (EYO7-8, EYO8-8, and EYO9-8) for small wind turbine application. The airfoils were subsequently used in conjunction with Blade Element Momentum Theory to develop and test 3-bladed 6 m diameter wind turbine rotors. The aerodynamic performance parameters of the airfoils tested were lift, drag, lift-to-drag ratio, and stall angle. At Re = 300,000, EYO7-8, EYO8-8, and EYO9-8 had maximum lift-to-drag ratios of 134, 131, and 127, respectively, and maximum lift coefficients of 1.77, 1.81, and 1.81, respectively. The stall angles were 12°for EYO7-8, 14°for EYO8-8, and 15°for EYO9-8. Together, the new airfoils compared favourably with other existing low Re airfoils and are suitable for the design of small wind turbine blades. Analysis of the results showed that the performance improvement of the EYO-Series airfoils is as a result of the design optimization that employed an optimal thickness-to-camber ratio (t/c) in the range of 0.85-1.50. Preliminary wind turbine rotor analysis also showed that the EYO7-8, EYO8-8, and EYO9-8 rotors had maximum power coefficients of 0.371, 0.366, and 0.358, respectively.

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Section: Airfoil Performance Summarymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of High Performance Airfoils for Application in Small Wind Turbine Power Generation

et al. 2020

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“…The fresh airfoil geometry and wind turbine blade approach was implemented Small changes on small wind turbine blades operating at less than 500,000 Reynolds, blade parameters such as pitch angle, chord and twist distribution were also discussed .The 4D printing method has proved a fresh paradigm for the design and manufacture of wind turbine blades. [11][12]. Airfoil SG 6043 has been chosen in their research.…”

Section: E Small Wind Turbine Rotor Bladesmentioning

confidence: 99%

Design and Fabrication of Small Horizontal axis wind Turbine Rotors at Low Reynolds Number

Chaudhary*¹,

Subramanian²

2019

IJITEE

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This research paper presents a design and fabrication of 100 Watt small horizontal axis wind turbine with 0.24 m and 0.35 m rotor radius and tip speed ratio varies from 2 to 10 was designed and development for operated at low wind speed with Low Reynolds number. In this paper, a new airfoil profile was designed and developed, it's denoted by MK115. The numerical and experimental analysis for 6 airfoils using Xfoil software was conducted with a view to evaluating the lift-to-drag ratio and angle of attack by means of the SD7024, SG6043, NACA2412, S1210, E213, and New Airfoil (MK115) tested. In simulation, new MK115 airfoil was the most convenient airfoil to start high energy production for low-wind applications, on the Reynolds number 25000, 50000, 75000, and 100000 in improved airfoil (MK115) Lmax of 0.92, 1.25, 1.69, 1.67 at Re=25k, 50k, 75k and 100k for an angle of attack is equal to 10 0 .A maximum lift to drag ratio (Cl/Cd) of 7,16,50,63 at Re=25k, 50k, 75k and 100k for New airfoil (MK115) at angle of attack (α) =4 0 , 4 0 , 8 0 , 8 0 . SG6043, NACA2412, E214, SD7034, S1210 and MK115 (New airfoil) have the Maximum C p =0.37, 0.36, 0.4, 0.39, 0.44, and 0.44 at tip speed ratio (λ) =6 for Reynolds number is equal to 100000. MK115, Maximum Torque obtained 0.9744 Nm, 1.389 Nm and 2.4866 Nm at blade angle =0, 15 and 30 degrees respectively. Power coefficient (Cp) =0.51, 0.5, 0.46, and 0.4 at Rotor shaft angle=0 0 , 5 0 , 10 0 , and 15 0 respectively for the new airfoil results. tests an Open type wind tunnel. An Xfoil analysis to obtain further data on the flow characteristics was also conducted. (MK115) airfoil have C

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“…The HAVT and H-VAWT are both lift type wind turbines, of which aerodynamic performance rely on the aerodynamic characteristics of airfoil. Karthikeyan et al (2015) reviewed the aerodynamic development on small HAWT, pointing that design of low Reynolds number airfoil contributed to improve the aerodynamic performance of wind turbine. Driss et al (2013) pointed out that under the same tip speed ratio, the power coefficient of micro HAWT increased with Reynolds number, but the static torque coefficient would not change.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Aerodynamic Characteristics for Three Typical Micro Wind Turbines at Low Reynolds Number

Zhu¹,

Zhang²,

Qu³

et al. 2020

JAFM

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Onsite utilization of wind energy in the urban environment is an effective solution to environmental protection and energy security. The typically micro wind turbines, including Savonius vertical axis wind turbine, H-type vertical axis wind turbine and micro horizontal axis wind turbine are more suitable for distributed generation, relative to centralized generation of large scale wind turbines. However, the wind in the urban environment characterized by low wind speed, high levels of turbulence and strongly unsteady direction and speed, directly affecting the aerodynamic characteristics of wind turbine. In the present work, wind tunnel tests have been conducted to investigate the low Reynolds number effect on aerodynamic characteristics for these three typical micro wind turbines, and the aerodynamic differences among them have been compared qualitatively and quantitatively. The experimental results show that micro horizontal axis wind turbine and H-type vertical axis wind turbine, belonging to lift-type wind turbine, have relatively higher startup wind speed and lower power coefficient due to deteriorative aerodynamic performance of airfoil at low wind speed. However, Savonius vertical axis wind turbine, as a drag-type wind turbine, exhibits excellent aerodynamic performance at low Reynolds number. The Savonius wind turbine has apparent output power at 5m/s, and the peak power coefficient exceeding 0.2 at 9m/s being superior to that of two other lift-type wind turbines at the same wind speed. In addition, in consideration of natural advantage of vertical axis wind turbine, Savonius wind turbine is the best option for applying at low Reynolds number urban environment.

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Review of aerodynamic developments on small horizontal axis wind turbine blade

Cited by 97 publications

References 30 publications

Development of High Performance Airfoils for Application in Small Wind Turbine Power Generation

Development of High Performance Airfoils for Application in Small Wind Turbine Power Generation

Design and Fabrication of Small Horizontal axis wind Turbine Rotors at Low Reynolds Number

Experimental Investigation of Aerodynamic Characteristics for Three Typical Micro Wind Turbines at Low Reynolds Number

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