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Enhancing efficiency of hybrid vertical axis turbine: Effect of various internal and external blades, collapsed rotor and reduced internal rotor velocity

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  • Tomar, Shivam Singh
  • Dewan, Anupam

Abstract

A hybrid turbine combining Savonius and Darrieus rotors enhances self-starting ability at lower tip speed ratios (TSRs) but suffers significant performance degradation at higher TSRs. This study introduces dynamic design modifications to tackle this challenge, including optimal selection of initial blade profiles, adjustments to the diameter and rotational speed of the internal Savonius rotor. A two-dimensional computational fluid dynamics (CFD) model, validated against experimental data, assesses these design changes. Shifting the internal rotor blade shape from semicircular to elliptical does not improve performance; however, altering the NACA profile to thinner aerofoils significantly enhances efficiency by 12 % at high TSRs. The collapsed rotor design enhances performance by 5–7 % for TSRs above 2.3 due to reduced vortex shedding. Among all the modifications considered, reducing the internal rotor velocity proves the most effective, achieving a peak power coefficient of 0.3354, surpassing that of Darrieus turbine. This study thoroughly analyses variations in torque and pressure coefficients resulting from these changes. It concludes by proposing a novel dynamic design integrating blade shape thickness morphing with reduced internal rotor velocity, thus contributing to sustainable development by optimizing turbine performance across different TSRs.

Suggested Citation

  • Tomar, Shivam Singh & Dewan, Anupam, 2025. "Enhancing efficiency of hybrid vertical axis turbine: Effect of various internal and external blades, collapsed rotor and reduced internal rotor velocity," Renewable Energy, Elsevier, vol. 255(C).
    • Handle: RePEc:eee:renene:v:255:y:2025:i:c:s0960148125014533
    DOI: 10.1016/j.renene.2025.123791
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    References listed on IDEAS

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    1. Rezaeiha, Abdolrahim & Montazeri, Hamid & Blocken, Bert, 2019. "On the accuracy of turbulence models for CFD simulations of vertical axis wind turbines," Energy, Elsevier, vol. 180(C), pages 838-857.
    2. Li, Ye, 2014. "On the definition of the power coefficient of tidal current turbines and efficiency of tidal current turbine farms," Renewable Energy, Elsevier, vol. 68(C), pages 868-875.
    3. Yadav, Sandeep & Veeravalli, Srinivas V. & Singh, Sidh Nath, 2024. "Effect of rotor spacing, overlapping and non-overlapping, on the performance of a coupled counter-rotating twin-rotor VAWT using CFD," Renewable Energy, Elsevier, vol. 221(C).
    4. Liang, Xiaoting & Fu, Sauchung & Ou, Baoxing & Wu, Chili & Chao, Christopher Y.H. & Pi, Kaihong, 2017. "A computational study of the effects of the radius ratio and attachment angle on the performance of a Darrieus-Savonius combined wind turbine," Renewable Energy, Elsevier, vol. 113(C), pages 329-334.
    5. Hashem, I. & Mohamed, M.H., 2018. "Aerodynamic performance enhancements of H-rotor Darrieus wind turbine," Energy, Elsevier, vol. 142(C), pages 531-545.
    6. Tescione, G. & Ragni, D. & He, C. & Simão Ferreira, C.J. & van Bussel, G.J.W., 2014. "Near wake flow analysis of a vertical axis wind turbine by stereoscopic particle image velocimetry," Renewable Energy, Elsevier, vol. 70(C), pages 47-61.
    7. Gupta, R. & Biswas, A. & Sharma, K.K., 2008. "Comparative study of a three-bucket Savonius rotor with a combined three-bucket Savonius–three-bladed Darrieus rotor," Renewable Energy, Elsevier, vol. 33(9), pages 1974-1981.
    8. 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.
    9. Raciti Castelli, Marco & Englaro, Alessandro & Benini, Ernesto, 2011. "The Darrieus wind turbine: Proposal for a new performance prediction model based on CFD," Energy, Elsevier, vol. 36(8), pages 4919-4934.
    10. Ferrari, G. & Federici, D. & Schito, P. & Inzoli, F. & Mereu, R., 2017. "CFD study of Savonius wind turbine: 3D model validation and parametric analysis," Renewable Energy, Elsevier, vol. 105(C), pages 722-734.
    11. Kumar, Rakesh & Raahemifar, Kaamran & Fung, Alan S., 2018. "A critical review of vertical axis wind turbines for urban applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 89(C), pages 281-291.
    12. Jacob, Joe & Chatterjee, Dhiman, 2019. "Design methodology of hybrid turbine towards better extraction of wind energy," Renewable Energy, Elsevier, vol. 131(C), pages 625-643.
    13. Mohamed, M.H., 2012. "Performance investigation of H-rotor Darrieus turbine with new airfoil shapes," Energy, Elsevier, vol. 47(1), pages 522-530.
    14. Rezaeiha, Abdolrahim & Kalkman, Ivo & Blocken, Bert, 2017. "CFD simulation of a vertical axis wind turbine operating at a moderate tip speed ratio: Guidelines for minimum domain size and azimuthal increment," Renewable Energy, Elsevier, vol. 107(C), pages 373-385.
    15. Zamani, Mahdi & Maghrebi, Mohammad Javad & Varedi, Seyed Rasoul, 2016. "Starting torque improvement using J-shaped straight-bladed Darrieus vertical axis wind turbine by means of numerical simulation," Renewable Energy, Elsevier, vol. 95(C), pages 109-126.
    16. Battisti, L. & Persico, G. & Dossena, V. & Paradiso, B. & Raciti Castelli, M. & Brighenti, A. & Benini, E., 2018. "Experimental benchmark data for H-shaped and troposkien VAWT architectures," Renewable Energy, Elsevier, vol. 125(C), pages 425-444.
    17. Liu, Kan & Yu, Meilin & Zhu, Weidong, 2019. "Enhancing wind energy harvesting performance of vertical axis wind turbines with a new hybrid design: A fluid-structure interaction study," Renewable Energy, Elsevier, vol. 140(C), pages 912-927.
    18. Mohamed, M.H. & Dessoky, A. & Alqurashi, Faris, 2019. "Blade shape effect on the behavior of the H-rotor Darrieus wind turbine: Performance investigation and force analysis," Energy, Elsevier, vol. 179(C), pages 1217-1234.
    19. Sagharichi, A. & Zamani, M. & Ghasemi, A., 2018. "Effect of solidity on the performance of variable-pitch vertical axis wind turbine," Energy, Elsevier, vol. 161(C), pages 753-775.
    20. Mohamed, M.H., 2013. "Impacts of solidity and hybrid system in small wind turbines performance," Energy, Elsevier, vol. 57(C), pages 495-504.
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