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An investigation on the aerodynamic performance of a co-axial contra-rotating vertical-axis wind turbine

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  • Poguluri, Sunny Kumar
  • Lee, Hyebin
  • Bae, Yoon Hyeok

Abstract

In this study, a conceptual co-axial contra-rotating vertical axis wind turbine (CR-VAWT) is conceived by splitting the single conventional vertical axis wind turbine (C-VAWT) blade length into two equal lengths forming two rotors separated by a small distance about the same axis of rotation. The available literature lacks much systematic investigation to find the best possible numerical setting and to extract an in-depth understanding of dominant factors limiting the aerodynamic performance of the CR-VAWT using CFD, constitutes the primary focus for the present study. Results from the CFD were compared with the analytical model formulated using FAST along with literature results. The power output of the CR-VAWT agrees well in the low wind speed and variation increases gradually as the wind speed increases compared to C-VAWT, however, the thrust is in good agreement at all wind speeds. The wake velocity directly behind the C-VAWT and CR-VAWT follows the general trend but differences were noticed to a distance accordingly, with the wind speed. The power performance reduces gradually with increasing speed for a fixed blade pitch angle. The present adopted concept of CR-VAWT are found to have negligible aerodynamic torque and side-side force action at the tower base.

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  • Poguluri, Sunny Kumar & Lee, Hyebin & Bae, Yoon Hyeok, 2021. "An investigation on the aerodynamic performance of a co-axial contra-rotating vertical-axis wind turbine," Energy, Elsevier, vol. 219(C).
    • Handle: RePEc:eee:energy:v:219:y:2021:i:c:s0360544220326542
    DOI: 10.1016/j.energy.2020.119547
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    2. Kuang, Limin & Su, Jie & Chen, Yaoran & Han, Zhaolong & Zhou, Dai & Zhang, Kai & Zhao, Yongsheng & Bao, Yan, 2022. "Wind-capture-accelerate device for performance improvement of vertical-axis wind turbines: External diffuser system," Energy, Elsevier, vol. 239(PB).
    3. Yutaka Hara & Yoshifumi Jodai & Tomoyuki Okinaga & Masaru Furukawa, 2021. "Numerical Analysis of the Dynamic Interaction between Two Closely Spaced Vertical-Axis Wind Turbines," Energies, MDPI, vol. 14(8), pages 1-23, April.
    4. Shubham, Shubham & Naik, Kevin & Sachar, Shivangi & Ianakiev, Anton, 2023. "Performance analysis of low Reynolds number vertical axis wind turbines using low-fidelity and mid-fidelity methods and wind conditions in the city of Nottingham," Energy, Elsevier, vol. 279(C).
    5. Shen, Zhuang & Gong, Shuguang & Xie, Guilan & Lu, Haishan & Guo, Weiyu, 2024. "Investigation of the effect of critical structural parameters on the aerodynamic performance of the double darrieus vertical axis wind turbine," Energy, Elsevier, vol. 290(C).

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