Sustainable Energy
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Sustainable Energy. 2014, 2(4), 121-125
DOI: 10.12691/rse-2-4-1
Open AccessArticle

Performance Analysis of a Water Savonius Rotor: Effect of the Internal Overlap

Ibrahim Mabrouki1, Zied Driss1, and Mohamed Salah Abid1

1Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax (ENIS), University of Sfax, B.P. 1173, Road Soukra km 3.5, 3038 Sfax, TUNISIA

Pub. Date: July 02, 2014

Cite this paper:
Ibrahim Mabrouki, Zied Driss and Mohamed Salah Abid. Performance Analysis of a Water Savonius Rotor: Effect of the Internal Overlap. Sustainable Energy. 2014; 2(4):121-125. doi: 10.12691/rse-2-4-1


The water Savonius rotor is classified as a vertical axis water rotor like the Darrieus, Gyromill or H-rotor. The advancing blade with concave side facing the water flow would experience more drag force than the returning blade, thus forcing the rotor to rotate. In this work, we are interested on the study of the of the internal overlap effect of a water Savonius rotor. The experimental results is developed using a hydraulic test bench. The test bench consists on an intake, a control gate, a penstock, a canalization, a test section, an outflow and a pump. A detailed description of the global characteristics is presented such as power, dynamic torque, power and its coefficients.

Savonius rotor internal overlap hydraulic test bench power coefficient torque coefficient

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[1]  Modi VJ, Roth NJ, Pittalwala A. Blade configuration of the Sovonius rotor with application to irrigation system in Indonesia. In: Proceedings of 16th intersociety energy conversion engineering conference, Atlanta, GA, USA, 1981.
[2]  Clark RN, Nelson V, Barieau RE, Gilmore E. Wind turbines for irrigation pumping. Journal of Energy 1981; 5: 104-8.
[3]  Modi VJ, Fernando MSUK, Yokomizo T. An integrated approach to design of a wind energy operated integrated system. ASME/AIAA Paper No. 98-0041, 1998.
[4]  Vishwakarma R. Savonius rotor wind turbine for water pumping—an alternate energy source for rural sites.Journal of Institution of Engineers (India) 1999; 79: 32-4.
[5]  Rourke FO, Boyle F, Reynolds A. Renewable energy resources and technologies applicable to Ireland. Renew Sust Energy Rev 2009; 13: 1975-84.
[6]  Khan MJ, Iqbal MT, Quaicoe JE. River current energy conversion systems: progress, prospects and challenges. Renew Sust Energy Rev 2008; 12: 2177-93.
[7]  Khan MJ, Bhuyan G, Iqbal MT, Quaicoe JE. Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river andtidal applications: A technology status review. Appl Energy 2009; 86: 1823-35.
[8]  Anyi M, Kirke B. Evaluation of small axial flow hydrokinetic turbines for remote communities. Energy Sust Dev 2010; 14: 110-6.
[9]  Guney MS, Kaygusuz K. Hydrokinetic energy conversion systems: a technology status review. Renew Sust Energy Rev 2010; 14:2 996-3004.
[10]  Rourke FO, Boyle F, Reynolds A. Marine current energy devices: current status and possible future applications in Ireland. Renew Sust Energy Rev 2010; 14: 1026-36.
[11]  Gorlov AM. Helical turbines for the Gulf stream: conceptual approach to design of a large scale floating power farm. Marine Technol 1998; 35: 175-82.
[12]  Shaughnessy BM, Probert SD. Partially-blocked Savonius rotor. Appl Energy 1992; 43: 239-49.
[13]  Huda MD, Selim MA, Sadrul Islam AKM, Islam MQ. The performance of an Sshaped Savonius rotor with a deflecting plate. RERIC Int Energy J 1992; 14 (1): 25-32.
[14]  Ogawa T, Yoshida H, Yokota Y. Development of rotational speed control systems for a Savonius-type wind turbine. J Fluids Eng 1989; 111: 53-8.
[15]  Alexander AJ, Holownia BP. Wind tunnel tests on a Savonius rotor. J Ind Aerodynam 1978; 3: 343-51.
[16]  Mohamed M, Janiga G, Pap E, Thevenin D. Optimisation of Savonius turbinesusing an obstacle shielding the returning blade. Renew Energy 2010; 35: 2618-26.
[17]  Modi VJ, Fernando MSUK. On the Performance of the Savonius Wind Turbine. JSolar Energy Eng 1989; 111: 71-81.
[18]  Kamoji MA, Kedare SB, Prabhu SV. Experimental investigations on single stage modified Savonius rotor. Appl Energy 2009; 86 (7-8): 1064-73.
[19]  I. Mabrouki, Z. Driss and MS. Abid, “Influence of the hight on Characteristics of Savonius Hydraulic Turbine,” International Conference on Mechanics and Energy ICME’2014, March 18-20, 2014, Monastir, TUNISIA.
[20]  I. Mabrouki, Z. Driss and MS. Abid, “Computer modeling of 3D turbulent free surface flow in a water channel with and without obstacle,” International Conference on Mechanics and Energy ICME’2014, March 18-20, 2014, Monastir, TUNISIA.
[21]  I. Mabrouki, Z. Driss and MS. Abid, “Hydrodynamic test bench design for the study of the water turbines,” International Symposium on Computational and Experimental Investigations on Fluid Dynamics CEFD’2013, March 18-20, 2013, Sfax, TUNISIA.
[22]  I. Mabrouki, Z. Driss and MS. Abid, “Experimental investigation of the height effect of water Savonius rotors,” International journal of mechanics and application, 2014: 4: 8-12.