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Investigation of deflector geometry and turbine aspect ratio effect on 3D modified in-pipe hydro Savonius turbine: Parametric study

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  • Payambarpour, S. Abdolkarim
  • Najafi, Amir F.
  • Magagnato, Franco

Abstract

In this research, a 3D (three dimensional) modified in-pipe hydro Savonius turbine with a deflector is studied experimentally and numerically. The new Savonius turbine has two blades, consisting of a large number of semicircles with different diameters and its axis is perpendicular to the flow direction. The turbine and a deflector are constructed 3D printing, and then tested in a laboratory rig in several operating conditions. The same conditions as in the experiments are simulated numerically. The validity of numerical results is proved by comparison with experimental results. Hence, numerical simulation is developed to investigate the effects of deflector and turbine geometry. Moreover, a theoretical consideration to evaluate output power is provided. In this study, the deflector geometry is defined by two parameters: blockage coefficient, and angle, which with turbine aspect ratio are considered as three variable parameters. The effect of changing these three parameters on the flow rate, output torque, and turbine efficiency is determined and described graphically using 3D streamlines and pressure contours. The results indicate a positive effect of increasing turbine height. However, the increase in deflector parameters is positive only up to a certain amount and beyond it that has an adverse effect on turbine performance.

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  • Payambarpour, S. Abdolkarim & Najafi, Amir F. & Magagnato, Franco, 2020. "Investigation of deflector geometry and turbine aspect ratio effect on 3D modified in-pipe hydro Savonius turbine: Parametric study," Renewable Energy, Elsevier, vol. 148(C), pages 44-59.
    • Handle: RePEc:eee:renene:v:148:y:2020:i:c:p:44-59
    DOI: 10.1016/j.renene.2019.12.002
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    Cited by:

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    2. Khani, Mohammad Sadegh & Shahsavani, Younes & Mehraein, Mojtaba & Kisi, Ozgur, 2023. "Performance evaluation of the savonius hydrokinetic turbine using soft computing techniques," Renewable Energy, Elsevier, vol. 215(C).
    3. Chen, Yunrui & Guo, Penghua & Zhang, Dayu & Chai, Kaixin & Zhao, Chenxi & Li, Jingyin, 2022. "Power improvement of a cluster of three Savonius wind turbines using the variable-speed control method," Renewable Energy, Elsevier, vol. 193(C), pages 832-842.
    4. Bizhanpour, Ali & Hasanzadeh, Nima & Najafi, Amir F. & Magagnato, Franco, 2023. "Investigation of different deflector geometry and mechanism effect on the performance of an in-pipe hydro Savonius turbine," Applied Energy, Elsevier, vol. 350(C).

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