Aerodynamic shape optimization of non-straight small wind turbine blades

Shen, Xueju; Yang, Hongxing; Chen, Jinge; Zhu, Xiaocheng; Du, Zhimin

doi:10.1016/j.enconman.2016.04.008

Cited by 63 publications

(21 citation statements)

References 50 publications

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“…The author of this study compared the design of a rotor blade with a straight, ±10% (forward or backward) sweep, dihedral and winglet and concluded that the aerodynamic performance is, in general, enhanced by these tip modifications, although the trends differ between the forward and backward orientations. Shen et al (2016) studied an aerodynamic shape optimization of non-straight small wind turbine blades where they attempted to optimize the annual energy production and the starting performance of HAWTs. According to these results, the wind turbine blades with a properly designed 3-dimensional stacking line can increase the annual energy production and have a better starting behaviour.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic performance of a horizontal axis wind turbine with forward and backward swept blades

Kaya

Köse

Ingham

et al. 2018

Journal of Wind Engineering and Industrial Aerodynamics

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Blades are the most important components of wind turbines in order to convert wind energy to mechanical energy. This study investigates the aerodynamic performance of Horizontal Axis Wind Turbines (HAWTs) with forward and backward swept blades. The effect of the blade sweep direction, the location of the sweep start up and the tip offset on the aerodynamic performance are investigated using a model HAWT with a 0.9 m rotor as the baseline configuration. Changes in power and thrust coefficients with swept blades are investigated for the design tip speed ratio of the baseline wind turbine at a wind speed of 10 m/s. The wind turbine with the forward swept blade that has sweep start up at rss/R=0.15 and tip offset of d/D=0.2 has been found to give a remarkable boost to the power output with an increase of about 2.9% over the baseline turbine. The backward swept blade with rss/R=0.75 and d/D=0.2 has shown the highest reduction in thrust coefficient, namely 5.4%, at the design tip speed ratio. In conclusion, it is found that the forward swept blades have the ability of increasing the performance while the backward swept blades tend to decrease the thrust coefficient.

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Section: Introductionmentioning

confidence: 99%

Aerodynamic performance of a horizontal axis wind turbine with forward and backward swept blades

Kaya

Köse

Ingham

et al. 2018

Journal of Wind Engineering and Industrial Aerodynamics

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“…Shen et al . optimized the geometry of wind turbine blades in terms of the distribution of the chord and twist angle with 3‐dimensional stacking line. They used Lifting Line Surface method with Free Wake model as the aerodynamic model.…”

Section: Introductionmentioning

confidence: 99%

“…In their study, the optimized mathematical model of the airfoils was established by combining Genetic Algorithm method and the flow solver RFOIL. Shen et al [20] optimized the geometry of wind turbine blades in terms of the distribution of the chord and twist angle with 3-dimensional stacking line. They used Lifting Line Surface method with Free Wake model as the aerodynamic model.…”

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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“…The 20year fatigue life (calculated using Miner's rule) was also incorporated as a constraint on the designs. In addition to structural optimisation, studies of wind turbine blades often investigate the aerofoil and blade geometric variables to improve the power production capacity and aerodynamic performance of the turbine [15] to [17]. The scope of the optimisation problem can be expanded to investigate the coupled aero-elastic behaviour of novel blade designs (e.g.…”

Section: Introductionmentioning

confidence: 99%

Validation of the multi-objective structural optimisation of a composite wind turbine blade

Fagan

Torre

Leen

et al. 2018

Composite Structures

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Structural optimisation of a wind turbine blade is presented in this work. The optimisation was performed using a multi-objective genetic algorithm and finite element modelling to determine the optimal structural design for a glass fibre-reinforced polypropylene composite blade. A candidate blade design from the Pareto efficient set was manufactured and tested for a range of structural characteristics. Static testing was carried out using a Whiffletree test rig and a laser scanner was used to determine the deflection of the blade to a high degree of accuracy. The finite element model results for the custom-made design are compared to the measured blade response. The FE model predictions for strains, mass and natural frequencies are in general agreement with the test results; however, notable deviations in the deflections predictions are attributed to modifications to the blade for manufacture and the shell-based modelling approach. The differences are discussed in detail and recommendations for future design work are outlined. The test results of the bespoke blade are also compared to two additional designs to determine the level of improvement afforded by the genetic algorithm approach. The bespoke glass fibre blade demonstrated an improvement in tip deflection of 16% relative to the original blade design.

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Aerodynamic shape optimization of non-straight small wind turbine blades

Cited by 63 publications

References 50 publications

Aerodynamic performance of a horizontal axis wind turbine with forward and backward swept blades

Aerodynamic performance of a horizontal axis wind turbine with forward and backward swept blades

Different functionalized chord and twist distributions in aerodynamic design of HAWTs

Validation of the multi-objective structural optimisation of a composite wind turbine blade

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