Investigating a Modified Vertical Axis Wind Turbine

Document Type : Original Article

Authors

1 Mechanical Power eng. Faculty of eng.

2 Mechanical Power Engineering Department Faculty of Engineering Menoufia University

Abstract

This investigation aims to analyze experimentally and numerically the performance of the Savonius wind turbine with a modified blade shape/profile. The wind turbine rotor introduced consists of two hook-shaped buckets connected by a Batch/arm with different bucket orientations. Blades of the cross-section with different thicknesses are considered. The simulations are carried out using the three-dimensional incompressible unsteady Reynolds-Average Navier Stokes (RANS) equations along with the RNG k-ε turbulence model. The results indicate that the RNG k-ε turbulence model achieves a good prediction of the rotor performance, in comparison with the literature and the current measurements. Six rotor models are investigated to explore the effect of rotor shape along with blade thickness on the wind turbine performance. It is revealed that the rotor model with a blade thickness of 2 mm and bucket orientation with a parallel arm-bucket, Model 4, has the best performance among the tested rotors. The static torque shows positive values for all rotor angles with a maximum static torque coefficient of 0.45, which reveals the high starting ability of the present rotor.

Keywords

ERJ. Engineering Research Journal
Volume 45, Issue 4
issued on 1/10/2022 in 6Parts: Part (1) Electrical Engineering, Part (2) Mechanical Engineering, Part (3): Production Engineering, Part (4): Civil Engineering, Part (5) Architectural Engineering, Part (6) Computer Science
October 2022
Pages 519-529

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