iipp publishingJournal of Applied Engineering Science

CFD STUDY ON THE ABILITY OF A VENTILATED BLADE IN IMPROVING THE SAVONIUS ROTOR PERFORMANCE


DOI: 10.5937/jaes16-17189
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions. 
Creative Commons License Volume 16 article 543 pages: 383 - 390

Rudi Hariyanto
Department of Mechanical Engineering, Merdeka University, Malang – Indonesia

Sudjito Soeparman
Department of Mechanical Engineering, Brawijaya University, Malang – Indonesia 

Denny Widhiyanuriyawan
Department of Mechanical Engineering, Brawijaya University, Malang – Indonesia 

Mega Nur Sasongko
Department of Mechanical Engineering, Brawijaya University, Malang – Indonesia 


This study aims to overview the ability of ventilated blades to improve the performance of the Savonius rotor based on CFD simulation. Rotor performance is analyzed by static torque, pressure profile, a airflow profile and vortex area. The boundary conditions for all simulations use the assumption that the wind speed is 5 m/s and the environmental pressure is 1 atm or 101325 Pa. The CFD simulation results have strengthen the published experimental results. Ventilation with the 5% gap width of blade diameter (the SV05 model) gives the best performance. Static torque of SV05 model is 23.8% higher than the conventional Savonius (SC) rotor. Based on pressure and airflow profile of CFD simulation results, ventilation on the blade can add the mass flow rate of air and make the lift force work early on rotating angle of 0o and 165°. Ventilation on  the blade also able to  improve  the critical condition and vortex area as seen in the SC rotor. This is shown by a static torque from the CFD simulation results. The static torque value of the SV05 rotor are 69% and 73% higher than the SC rotor at the 165° and 0° rotation angle.

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The authors would like to thank the Studio of Design & Systems Engineering, Mechanical Engineering Department, Brawijaya University. Special thanks to Mr. Darto (lecturer of Mechanical Engineering Department, Merdeka University) who has taught the mastercam program.

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