A Direct Approach of Design Optimization for Small Horizontal Axis Wind Turbine Blades

Tang, Xi; Huang, Xia; Peng, Ruitao; Liu, Xiongwei

doi:10.1016/j.procir.2015.01.047

Cited by 43 publications

(23 citation statements)

References 5 publications

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“…For small wind turbine applications, low wind speeds are generally characterized by airflows with Reynolds numbers (Re) below 500,000. 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].…”

Section: Introductionmentioning

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: Introductionmentioning

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 numerical results agree well with the BEM calculation. Tang et al [20] presented a direct method for small wind turbine blade design and optimization. They developed a unique aerodynamic mathematical model to find the optimal blade chord and twist angle distributions along the blade span.…”

Section: Introductionmentioning

confidence: 99%

Small Wind Turbine Blade Design and Optimization

2019

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This work aims at designing and optimizing the performance of a small Horizontal-Axis-Wind-Turbine to obtain a power coefficient (C P ) higher than 40% at a low wind speed of 5 m/s. Two symmetric in shape airfoils were used to get the final optimized airfoil. The main objective is to optimize the blade parameters that influence the design of the blade since the small turbines are prone to show low performance due to the low Reynolds number as a result of the small size of the rotor and the low wind speed. Therefore, the optimization process will select different airfoils and extract their performance at the design conditions to find the best sections which form the optimal design of the blade. The sections of the blade in the final version mainly consist of two different sections belong to S1210 and S1223 airfoils. The optimization process goes further by investigating the performance of the final design, and it employs the blade element momentum theory to enhance the design. Finally, the rotor-design was obtained, which consists of three blades with a diameter of 4 m, a hub of 20 cm radius, a tip-speed ratio of 6.5 and can obtain about 650 W with a Power coefficient of 0.445 at a wind-speed of 5.5 m/s, reaching a power of 1.18 kW and a power coefficient of 0.40 at a wind-speed of 7 m/s.

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“…Chord and twist distributions and placement of the airfoil sections along the blade span were selected as the optimization variables. A unique approach of searching optimal induction factors was developed by Tang et al [18] to obtain optimal blade chord and twist angle distributions in small wind turbine blade design. Also blade performance evaluation with Reynolds number effect and tip-hub loss effect was included in their design optimization.…”

Section: Introductionmentioning

confidence: 99%

Different functionalized chord and twist distributions in aerodynamic design of HAWTs

Tahani

Kavari

Mirhosseini

et al. 2019

Env Prog and Sustain Energy

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In this study, blade element momentum (BEM) theory has been used to calculate power output and performance of 100 kW and 1 MW horizontal axis wind turbine. Riso‐A1‐21 airfoils are considered as utilized section along the blade span. Generally, Riso family of airfoils is appropriate for wind turbine application. In order to improve the accuracy of turbine performance prediction, lots of corrections have been applied on the BEM method. The aim of this research study is proposing a new procedure to introduce the chord and twist distributions by fitting different types of functions on them. Accordingly, 48 functions are selected as possible distributions for chord and twist angle profiles. These functions are selected in such a way that their behavior is close to the trend of their classical distributions. The utilized design method in this study is optimum in terms of performance and also making distribution of chord and twist functional which is more appropriate for manufacturing process. Finally, the effect of using best functions on blade aerodynamic coefficients has been studied. Results show that despite the changing chord and twist distributions from their classical trends, the aerodynamic coefficients are approximately similar to those in the classical design except in some region of blade. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13108, 2019

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A Direct Approach of Design Optimization for Small Horizontal Axis Wind Turbine Blades

Cited by 43 publications

References 5 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

Small Wind Turbine Blade Design and Optimization

Different functionalized chord and twist distributions in aerodynamic design of HAWTs

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