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Numerical investigation of dimple effects on darrieus vertical axis wind turbine

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  • Sobhani, Elyas
  • Ghaffari, Mohammad
  • Maghrebi, Mohammad Javad

Abstract

The Darrieus wind turbine is a type of vertical-axis wind turbines which, in spite of its simple structure, is very complex to analyze. In terms of aerodynamics, Darrieus VAWTs have properties which tend to make them distinctive of horizontal-axis wind turbines but generally are less effective. In the present research, a cavity is created into blade's profile of a VAWT to enhance its performance. The computational fluid dynamics have been used to simulate the turbine in turbulent flow and finally calculate the forces affecting it. The shear stress transport (SST) k-w turbulence model has been used to complete the governing equations and the turbine has been modeled in two dimensions. In order to enhance efficiency and aerodynamic performance of the turbine, effects of different dimple parameters including diameter, profile and its location has been considered. The optimum airfoil state has been found with circular dimple with diameter equal to 8% of cord length located on pressure side of the airfoil and near the leading edge. Eventually, it was observed that the efficiency at optimal performance (λ = 2.6) and average efficiencies of the turbine were 18% and 25% improved when using the airfoil with a cavity, as compared to the reference airfoil.

Suggested Citation

  • Sobhani, Elyas & Ghaffari, Mohammad & Maghrebi, Mohammad Javad, 2017. "Numerical investigation of dimple effects on darrieus vertical axis wind turbine," Energy, Elsevier, vol. 133(C), pages 231-241.
    • Handle: RePEc:eee:energy:v:133:y:2017:i:c:p:231-241
    DOI: 10.1016/j.energy.2017.05.105
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    Cited by:

    1. Zhu, Xinyu & Guo, Zhiping & Zhang, Yanfeng & Song, Xiaowen & Cai, Chang & Kamada, Yasunari & Maeda, Takao & Li, Qing'an, 2022. "Numerical study of aerodynamic characteristics on a straight-bladed vertical axis wind turbine with bionic blades," Energy, Elsevier, vol. 239(PE).
    2. Javaid, M. Tariq & Sajjad, Umar & Saddam ul Hassan, Syed & Nasir, Sheharyar & Shahid, M. Usman & Ali, Awais & Salamat, Shuaib, 2023. "Power enhancement of vertical axis wind turbine using optimum trapped vortex cavity," Energy, Elsevier, vol. 278(PA).
    3. Zhong, Junwei & Li, Jingyin & Guo, Penghua & Wang, Yu, 2019. "Dynamic stall control on a vertical axis wind turbine aerofoil using leading-edge rod," Energy, Elsevier, vol. 174(C), pages 246-260.
    4. Wong, Kok Hoe & Chong, Wen Tong & Poh, Sin Chew & Shiah, Yui-Chuin & Sukiman, Nazatul Liana & Wang, Chin-Tsan, 2018. "3D CFD simulation and parametric study of a flat plate deflector for vertical axis wind turbine," Renewable Energy, Elsevier, vol. 129(PA), pages 32-55.
    5. D'Alessandro, Valerio & Clementi, Giacomo & Giammichele, Luca & Ricci, Renato, 2019. "Assessment of the dimples as passive boundary layer control technique for laminar airfoils operating at wind turbine blades root region typical Reynolds numbers," Energy, Elsevier, vol. 170(C), pages 102-111.
    6. Zhang, Yanfeng & Li, Qing'an & Zhu, Xinyu & Song, Xiaowen & Cai, Chang & Zhou, Teng & Kamada, Yasunari & Maeda, Takao & Wang, Ye & Guo, Zhiping, 2022. "Effect of the bionic blade on the flow field of a straight-bladed vertical axis wind turbine," Energy, Elsevier, vol. 258(C).
    7. Chenguang Song & Guoqing Wu & Weinan Zhu & Xudong Zhang & Jicong Zhao, 2019. "Numerical Investigation on the Effects of Airfoil Leading Edge Radius on the Aerodynamic Performance of H-Rotor Darrieus Vertical Axis Wind Turbine," Energies, MDPI, vol. 12(19), pages 1-14, October.
    8. Syawitri, T.P. & Yao, Y.F. & Chandra, B. & Yao, J., 2021. "Comparison study of URANS and hybrid RANS-LES models on predicting vertical axis wind turbine performance at low, medium and high tip speed ratio ranges," Renewable Energy, Elsevier, vol. 168(C), pages 247-269.
    9. Ma, Ning & Lei, Hang & Han, Zhaolong & Zhou, Dai & Bao, Yan & Zhang, Kai & Zhou, Lei & Chen, Caiyong, 2018. "Airfoil optimization to improve power performance of a high-solidity vertical axis wind turbine at a moderate tip speed ratio," Energy, Elsevier, vol. 150(C), pages 236-252.
    10. Mohamed, M.H., 2019. "Criticism study of J-Shaped darrieus wind turbine: Performance evaluation and noise generation assessment," Energy, Elsevier, vol. 177(C), pages 367-385.
    11. Taurista P. Syawitri & Yufeng Yao & Jun Yao & Budi Chandra, 2022. "A review on the use of passive flow control devices as performance enhancement of lift‐type vertical axis wind turbines," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 11(4), July.
    12. Su, Jie & Chen, Yaoran & Han, Zhaolong & Zhou, Dai & Bao, Yan & Zhao, Yongsheng, 2020. "Investigation of V-shaped blade for the performance improvement of vertical axis wind turbines," Applied Energy, Elsevier, vol. 260(C).
    13. Liu, Qingsong & Miao, Weipao & Ye, Qi & Li, Chun, 2022. "Performance assessment of an innovative Gurney flap for straight-bladed vertical axis wind turbine," Renewable Energy, Elsevier, vol. 185(C), pages 1124-1138.
    14. Rezaeiha, Abdolrahim & Montazeri, Hamid & Blocken, Bert, 2018. "Towards optimal aerodynamic design of vertical axis wind turbines: Impact of solidity and number of blades," Energy, Elsevier, vol. 165(PB), pages 1129-1148.
    15. Cheng, Biyi & Du, Jianjun & Yao, Yingxue, 2022. "Power prediction formula for blade design and optimization of Dual Darrieus Wind Turbines based on Taguchi Method and Genetic Expression Programming model," Renewable Energy, Elsevier, vol. 192(C), pages 583-605.

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