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Numerical investigation of performance refinement of a drag wind rotor using flow augmentation and momentum exchange optimization

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  • Mohammadi, M.
  • Mohammadi, R.
  • Ramadan, A.
  • Mohamed, M.H.

Abstract

Numerical ascertainment of improving performance of modified Savonius rotor as decreasing the minimum wind speed required for initiating the rotation is investigated using 3D flow predictions executed in ANSYS-FLUENT. For making the comparison feasible, the design represented in a similar paper is simulated and performance is compared with empirical data. Different types of nozzles are added after observing acceptable agreement between empirical and simulation results. Nozzle acts like an air intake on the advancing blade and fortifies the acting flow; it also eliminates the reverse moment caused by contacting the flow with returning blade. Therefore, increasing in power coefficient is anticipated. Systematic analysis of obtained torque and power coefficients with and without nozzle are presented. In the next step, this work is dedicated to bucket shape optimization. Buckets with multi-curvature are introduced and have been investigated in three stages. By installing a simple nozzle with tail in front of a Savonius wind turbine with double-curved two stage buckets, the Savonius turbine maximum power coefficient is improved from 0.13 to 0.39.

Suggested Citation

  • Mohammadi, M. & Mohammadi, R. & Ramadan, A. & Mohamed, M.H., 2018. "Numerical investigation of performance refinement of a drag wind rotor using flow augmentation and momentum exchange optimization," Energy, Elsevier, vol. 158(C), pages 592-606.
    • Handle: RePEc:eee:energy:v:158:y:2018:i:c:p:592-606
    DOI: 10.1016/j.energy.2018.06.072
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    References listed on IDEAS

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    Cited by:

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    3. Anesu Godfrey Chitura & Patrick Mukumba & Ndanduleni Lethole, 2024. "Enhancing the Performance of Savonius Wind Turbines: A Review of Advances Using Multiple Parameters," Energies, MDPI, vol. 17(15), pages 1-17, July.
    4. Guo, Fen & Song, Baowei & Mao, Zhaoyong & Tian, Wenlong, 2020. "Experimental and numerical validation of the influence on Savonius turbine caused by rear deflector," Energy, Elsevier, vol. 196(C).
    5. Khan, Zain Ullah & Ali, Zaib & Uddin, Emad, 2022. "Performance enhancement of vertical axis hydrokinetic turbine using novel blade profile," Renewable Energy, Elsevier, vol. 188(C), pages 801-818.
    6. Shaikh Zishan & Altaf Hossain Molla & Haroon Rashid & Kok Hoe Wong & Ahmad Fazlizan & Molla Shahadat Hossain Lipu & Mohd Tariq & Omar Mutab Alsalami & Mahidur R. Sarker, 2023. "Comprehensive Analysis of Kinetic Energy Recovery Systems for Efficient Energy Harnessing from Unnaturally Generated Wind Sources," Sustainability, MDPI, vol. 15(21), pages 1-18, October.
    7. Kumail Abdulkareem Hadi Al-Gburi & Balasem Abdulameer Jabbar Al-quraishi & Firas Basim Ismail Alnaimi & Ee Sann Tan & Ali Hussein Shamman Al-Safi, 2022. "Experimental and Simulation Investigation of Performance of Scaled Model for a Rotor of a Savonius Wind Turbine," Energies, MDPI, vol. 15(23), pages 1-23, November.
    8. Zhang, Yongchao & Kang, Can & Ji, Yanguang & Li, Qing, 2019. "Experimental and numerical investigation of flow patterns and performance of a modified Savonius hydrokinetic rotor," Renewable Energy, Elsevier, vol. 141(C), pages 1067-1079.

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