Abstract— The savonius rotor is a vertical-axis wind turbine which operates according to the drag forces. It is widely used as equipment with the wind as a source of energy and has a simple design, it is easy to install, good starting ability, relatively low operating speed, and independent of wind direction. Several studies have been conducted in the last decade to improve the performance of this equipment with the focus on the aspect ratio, overlap ratio, and installing additional devices such as curtain design, deflector plate, guide box tunnel, and windshields. Swirling savonius rotor is an improvement on the savonius rotor with a gap between the concave and convex blades to reduce the negative torque generated by the convex blade. This present study was conducted to analyze the power coefficients, drag coefficients, and static torque of a swirling savonius rotor with omnidirectional guide vanes by measuring the pressure distribution on the blade surfaces at different rotor angles. The experiments were conducted at a Reynolds number of 1,1x105 with the rotor having two semi-circular blades, an overlap ratio of 0,2, and the number of omnidirectional guide vanes varied at 4, 8, 12, and 16. The results showed all the omnidirectional guide vanes except 16 increased the static torque and drag coefficients of the swirling savonius rotor.

Index Terms— static torque, drag coefficients, swirling savonius rotor, omnidirectional guide vanes

Cite: Indra Herlamba Siregar, Moch Effendy, and Akhmad Hafizh Ainur Rasyid, "The Effect of the Number of Vanes in the Omnidirectional Guide Vane on Aerodynamics Characteristic of Stationary Swirling Savonius Rotor," International Journal of Mechanical Engineering and Robotics Research, Vol. 10, No. 8, pp.464-468, August 2021. DOI: 10.18178/ijmerr.10.8.464-468

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