Numerical Investigation of Hydrokinetic Savonius Rotor with Two Shielding Plates

M. Hemida, W. A. Abdel-Fadeel, A. Ramadan, W. A. Aissa

Abstract

Savonius hydrokinetic rotor is an evolution of the conventional savonius wind turbine. This rotor is suitable for low flow velocities with simple design, high starting torque and working for all flow directions. However, the torque fluctuation of this rotor is a serious problem due to the negative moment generated at the returning blade of this rotor. In this paper, a numerical investigation with commercial computational fluid dynamic (CFD) package FLUENT for modified savonius rotor with two deflector plates in the upstream of the turbine is conducted to find the optimum position of the two deflector plates to increase the power coefficient using water as a working medium. Results show that the model with the best orientation of the two deflector plates in the upstream increases the power coefficient by 80%. This may be due to the overlapped effect of decreasing the negative moment on the returning blade and the increased flow velocity at the advancing blade.

Keywords

Hydrokinetic; Numerical; Savonius rotor; Shielding plate.

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References

P. Jaohindy, S. McTavish, F. Garde and A. Bastide, An analysis of the transient forces acting on savonius rotors with different aspect ratios, Renewable Energy, 55, 286-295, 2013.

T. Hayashi, L. Yan and H. Yutaka, Wind tunnel tests on a different phase three-stage savonius rotor, JSME International Journal Series B Fluids and Thermal Engineering, 48(1), 9-16, 2005.

N. Mahmoud, A. El-Haroun, E. Wahba and M. Nasef, An experimental study on improvement of savonius rotor performance, Alexandria Engineering Journal, 51, 19-25, 2012.

V. Modi, N. Roth and M. Fernando, Optimum-configuration studies and prototype design of a wind-energy-operated irrigation system, Journal of Wind Engineering and Industrial Aerodynamics, 16, 85-96, 1984.

B. Blackwell, R. Sheldahl and L. Feltz, Wind Tunnel Performance Data for Two and Three-bucket Savonius Rotors. Albuquerque, NM: Sandia Labs, 1977.

A. Ramadan, K. Yousef, M. Said and M. H. Mohamed, Shape optimization and experimental validation of a drag vertical axis wind turbine, Energy, 151, 839-853, 2018.

A. H. Elbatran, M. Ahmed Yasser and S. Shehata Ahmed, Performance study of ducted nozzle savonius water turbine, comparison with conventional savonius turbine, Energy, 134, 566-584, 2017.

M. A. Kamoji, B. Kedare Shireesh and S. V. Prabhu, Experimental investigations on single stage modified savonius rotor, Applied Energy, 86(7), 1064-1073, 2009.

A. R. El-Baz, K. Youssef and M. H. Mohamed, Innovative improvement of a drag wind turbine performance, Renewable Energy, 86, 89-98, 2016.

M. H. Mohamed, Design Optimization of Savonius and Wells Turbines. Ottovon-Guericke University Magdeburg, 2011.

K. Golecha, T. I. Eldho and S. V. Prabhu, Influence of the deflector plate on the performance of modified savonius water turbine, Applied Energy, 88(9), 3207-3217, 2011.

K. Golecha, T. I. Eldho and S. V. Prabhu. Performance study of modified Savonius water turbine with two deflector plates, International Journal of Rotating Machinery, 2012, ID 679247.

Iio Shouichiro, Katayama Yusuke, Uchiyama Fuminori, Sato Eiichi and Ikeda Toshihiko, Influence of setting condition on characteristics of savonius hydraulic turbine with a shield plate, Journal of Thermal Science, 20(3), 224-228, 2011.

P. Talukdar, A. Sardar, V. Kulkarni and U. Saha, Parametric analysis of model savonius hydrokinetic turbines through experimental and computational investigations, Energy Conversion and Management, 158, 36-49, 2018.

A. Ramadan, Innovative design investigation of an augmented drag vertical Axis wind turbine under unsteady characteristics, Proceedings of the 4th International Conference and Exhibition on Mechanical and Aerospace Engineering, Orlando, USA, 2016, pp. 1-19.

ANSYS, 14.0 User's Guide, ANSYS Inc., 2011.

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