Analysis the vortex effect on the performance of Savonius windmill based on CFD simulation and video recording

rudi hariyanto, Sudjito Soeparman, Denny Widhiyanuriyawan, Mega Nur Sasongko

Abstract


Savonius windmill is ideal for areas that have low wind speeds and fluctuating. However, the weakness of Savonius windmill is the efficiency or better known as the coefficient of performance (Cp) is lower than horizontal axis wind turbine and Darrieus wind turbines. One cause is the formation of vortex when the blade was rotating. Vortex will absorb the energy of the wind flow or cause a negative kinetic energy. CFD simulation can be used as one tool that can be used to help analyze the loss of wind flow, including the formation of vortex on Savonius blades. Wind speed of 2 m/s and 5 m/s is used as a simulation variable to obtain an overview of wind flow losses occurring in blade Savonius. The largest vortex formed at an angle of 165o rotating blade is good for wind speed of 2 m/s and 5 m/s. The larger the vortex area are formed causing the lower the pressure and torque acting on the blade surface.

Keywords


wind energy

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References


www.esdm.go.id/berita/37-umum/1962-potensi-energi-baru-terbarukan-ebt-indonesia.pdf.

Akwa JV . Stators Use Influence On The Performance Of A Savonius Wind Rotor Using Computational Fluid Dynamics. Engenharia Térmica (Thermal Engineering), Vol. 10 • No. 01 - 02 • June and December 2011 • p. 63-72. (http://demec.ufpr.br/reterm/ed_ant/18/artigos/233-2012.pdf.)

Shevell, R.S, Fundamentals of Flight, Second Edition, Prentice Hall, New Jersey, 1989. http://techthirstbook.blogspot.co.id/2012/03/fundamentals-of-flight-by-richard-s.html

http://www.mediafire.com/download/5hzmiyyjkzg/Fundamentals+of+Flight.pdf

J.W. Twidwell, A.D. Weir, Renewable Energy Resources, The University Press Cambridge, Britain, p. 411, 1985 (http://maxwell.sze.hu/~marcsa/MegujuloEnergiaforrasok/Books/renewable energy resources.pdf)

Fujisawa, N., Gontoh, F., Pressure Measurements and Flow Visualization Study of a Savonius Rotor, Journal of Wind Engineering

and Industrial Aerodynamics 39, pp. 51-60, 1992. (http://www.sciencedirect.com/science/article/pii/016761059290532F)

Jean Luc Menet & Nachida Bourabaa, Increase in the Savonius Efficiency via a parametric investigation, ENSIAME Journal, F 59313 France, 2008. (https://www.researchgate.net/publication/228957621_Increase_in_the_Savonius_rotors_efficiency_via_a_parametric_investigation) and (http://educypedia.karadimov.info/library/23_1400_jeanlucmenet_01.pdf)

V. D'Alessandro, Unsteady Aerodynamics of a Savonius wind rotor: a new computational approach for the simulation of energy performance, Elsevier Journals, p.3349 -3363, 2010. (https://www.researchgate.net/publication/239347622_Unsteady_Aerodynamics_of_a_Savonius_wind_rotor_A_new_computational_approach_for_the_simulation_of_energy_performance)

Nakajima, M., Lio, S., Ikeda, T., Performance of Savonius Rotor for Environmentally Friendly Hydraulic Turbine, Journal of Fluid Science and Technology, vol. 3 no. 3, 2008. (https://www.researchgate.net/profile/Shouichiro_Iio/publication/37199759_Performance_of_Savonius_Rotor_for_Environmentally_Friendly_Hydraulic_Turbine/links/5428328a0cf26120b7b5652c.pdf)

Sukanta Roy, Saha, UK., Computational study to assess the influence of overlap ratio on static tprque characteristics of a vertical axis wind turbine, Elsevier Journals, Procedia Engineering 51, p.694-702, 2013. (http://www.sciencedirect.com/science/article/pii/S1877705813001008)

Kamoji, MA., Kedare, SB., Prabhu, SV., Experiments Investigations on Single Stage Modified Savonius Rotor, Applied Energy 86, pp. 1064-1073, 2009. (http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=279652B423B1359CA7706C32B76B13B3?doi=10.1.1.617.3103&rep=rep1&type=pdf)

Gavalda, Jna., Massons, J., Diaz, F., Drag and Lift Coefficients of the Savonius Wind Machine, Wind Engineering vol. 15 no. 5, 1991 (https://www.researchgate.net/publication/290841387_Drag_and_lift_coefficients_of_the_Savonius_wind_machine)




DOI (PDF): https://doi.org/10.20508/ijrer.v6i3.4063.g6884

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