Blade thickness effect on the aerodynamic performance of an asymmetric NACA six series blade vertical axis wind turbine in low wind speed

Mazarbhuiya, Hussain Mahamed Sahed Mostafa; Biswas, Agnimitra; Sharma, K. K.

doi:10.1080/15435075.2020.1712214

Cited by 24 publications

(9 citation statements)

References 39 publications

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“…The variation of Cp against different tip speed ratio (TSR) is shown in Fig. 8 for different twist angles and also validated the trend of the curve with [25]. The variations in TSR range occur due to different solidities of the turbines.…”

Section: Resultssupporting

confidence: 61%

“…It is found from these literatures that the root mean square error (RMSE) are 25%, 6.8%, 7% and 8.5% in their validations, whereas in the present validation the RMSE is only 4.22%, which is less compared to the published results of [19,[22][23][24], and therefore it shows the accuracy of the present CFD results. The RMSE is obtained using Eq.7 [25].…”

Section: Fine 233154mentioning

confidence: 99%

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A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

Mazarbhuiya¹,

Biswas²,

Sharma³

2018

EAI Endorsed Transactions on Energy Web

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For urban areas, small-scale vertical axis wind turbine (VAWT) is a promising energy harvester due to its compact structure. However, VAWT's performance is inferior in low wind speed of urban environment. Selection of proper design and operational parameters can give a desirable power output under such condition. In this paper, effect of trailing edge blade twist on aerodynamic performance of an asymmetric blade H-Darrieus VAWT at a wind speed (6.0 m/s) is investigated using 2D numerical simulation. Important aerodynamic parameters considering blade twists have been analysed. Although blade twist has not increased power coefficient magnificently, the same is improved with blade twist of 1º. However, further increase of the latter reduces the turbine performance. A maximum power coefficient of 0.171 is obtained at tip speed ratio 2.4 for 1º blade twist configuration. Hence, the present study shows that blade twist should be very low for low wind speed application of H-Darrieus VAWT.

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Section: Resultssupporting

confidence: 61%

Section: Fine 233154mentioning

confidence: 99%

A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

Mazarbhuiya¹,

Biswas²,

Sharma³

2018

EAI Endorsed Transactions on Energy Web

Self Cite

View full text Add to dashboard Cite

show abstract

“…Several other authors have made contributions to the studies concerning the airfoil effects on VAWT within the last 3 years, for examples Song et al. [ 21 ] , Liang and Li, [ 22 ] Mazarbhuiya et al., [ 23 ] and Rezaeihaa et al. [ 24 ] However, most of the studies were focused on low to medium solidity turbines and on the rotor power.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Airfoil Thickness on Dynamic Stall Characteristics of High‐Solidity Vertical Axis Wind Turbines

Bangga

Hutani

Heramarwan

2021

Advcd Theory and Sims

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The flow physics of high solidity vertical axis wind turbines (VAWTs) is influenced by the dynamic stall effects. The present study is aimed at investigating the effects of airfoil thickness on the unsteady characteristics of high solidity VAWTs. Seven different national advisory committee for aeronautics (NACA) airfoils (0008, 0012, 0018, 0021, 0025, 0030, 0040) are investigated. A high fidelity computational fluid dynamics (CFD) approach is used to examine the load and flow characteristics in detail. Before the study is undertaken, the CFD simulation is validated with experimental data as well as large eddy simulation results with sound agreement. The investigation demonstrates that increasing the airfoil thickness is actually beneficial not only for suppressing the dynamic stall effects but also to improve the performance of high solidity turbines. Interestingly this is accompanied by a slight reduction in thrust component. The strength and radius of the dynamic stall vortex decrease with increasing airfoil thickness. The airfoil thickness strongly influences the pressure distributions during dynamic stall process, which is driven by the suction peak near the leading edge. The knowledge gained might be used by blade engineers for designing future turbines and for improving the accuracy of engineering models.

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“…Further, fossil fuels will be exhausted within a century at their current consumption rates [2,3]. A relentless search for a clean, non-depleting source of energy has finally succeeded through the development of renewable energy sources [4][5][6][7]. Some studies suggest that a 100% renewable energy (RE)-based European Union (EU) power system is feasible by the year 2050 with upgradation of cross-border power transmission capabilities and energyefficiency (EE) improvement measurers [8,9].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Low-Power Wind Turbine Using Conical Sections

2021

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This paper examines the performance of conical sections (concentrator and diffuser) to improve the energy-recovery prospects of small-scale wind turbines. Detailed simulation studies of the conical sections with convergence angle viz., concentrator, and divergence angle viz., diffuser were conducted using ANSYS Fluent® software. Using simulation data, a trend analysis was conducted, and the empirical equations were derived for calculating the velocity variation and power variation in terms of the convergence/divergence angles. Working prototype models with optimum angles were fabricated for both the diffuser and concentrator. These models were then augmented with a wind turbine coupled with a 100 W, 24 V DC generator and tested to validate the simulation results. Upon analyzing the simulation data, it was found that a maximum velocity variation of 23.3% was achieved at an angle of 4.5° for the diffuser, whereas a maximum power variation of 65.1% was achieved at an angle of 3.6° for the same diffuser. The aforementioned improvement was achieved by optimizing divergence angle alone. The proposed designs of the diffuser- and concentrator-augmented wind turbine, as well as the empirical equations for calculating the velocity variation and power variation in terms of the divergence and convergence angle, are the major contributions of this article.

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Blade thickness effect on the aerodynamic performance of an asymmetric NACA six series blade vertical axis wind turbine in low wind speed

Cited by 24 publications

References 39 publications

A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

A 2D numerical simulation of blade twist effect on the aerodynamic performance of an asymmetric blade vertical axis wind turbine in low wind speed

The Effects of Airfoil Thickness on Dynamic Stall Characteristics of High‐Solidity Vertical Axis Wind Turbines

Performance Improvement of a Low-Power Wind Turbine Using Conical Sections

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