An experimental study on improvement of a Savonius rotor performance with curtaining

Altan, Burçin Deda; Atılgan, Mehmet; Özdamar, Aydoğan

doi:10.1016/j.expthermflusci.2008.06.006

Cited by 163 publications

(84 citation statements)

References 15 publications

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“…Kamoji et al [11] and Gupta et al [12] studied the aerodynamic characteristics of a modified Savonius turbine with helical blades, while Golecha et al [13] and Altan and Atilgan [14,15] placed a guide vane in front of the turbine to deflect flow for the returning blade. McTavish et al [16] proposed a modified blade shape and carried out both steady and transient CFD simulations.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

et al. 2015

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Abstract:The Savonius wind turbine is a type of vertical axis wind turbine (VAWTs) that is simply composed of two or three arc-type blades which can generate power even under poor wind conditions. A modified Savonius wind turbine with novel blade shapes is introduced with the aim of increasing the power coefficient of the turbine. The effect of blade fullness, which is a main shape parameter of the blade, on the power production of a two-bladed Savonius wind turbine is investigated using transient computational fluid dynamics (CFD). Simulations are based on the Reynolds Averaged Navier-Stokes (RANS) equations with a renormalization group turbulent model. This numerical method is validated with existing experimental data and then utilized to quantify the performance of design variants. Results quantify the relationship between blade fullness and turbine performance with a blade fullness of 1 resulting in the highest coefficient of power, 0.2573. This power coefficient is 10.98% higher than a conventional Savonius turbine.

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Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

et al. 2015

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“…We should also consider the diversity of turbine types and materials used twenty years ago, which proves this point. The small wind energy sector is just one example of a leviathan starving to death for the lack of a longterm research [15][16][17][18]. A lower moist air density and a higher frequency of extreme wind velocities should be considered when it comes to research studies.…”

Section: Resultsmentioning

confidence: 99%

Wind turbines design corrections for next Galicia climatic conditions

et al. 2017

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Abstract. Galicia, placed in northwest of Spain, is a clear example of global wind energy development as a consequence of its climate conditions. Despite this fact, previous research works have indicated a climate change in the next years that must be considered at the time of wind turbine design, selection, and placement. In this work, information about weather conditions and power output from twenty four wind turbines was sampled in a typical year, and a statistic study was done. Based on this information, a model that relates weather to power conversion in this particular region and wind turbines model was obtained. This particular procedure lets us de ne the e ect of climate change over wind power on Galician wind farms. Results showed a 10% power output fall during spring and summer seasons. Therefore, future studies about new technologies that work out well under those conditions, such as low wind turbines, must be done. At the same time, results can be employed for future wind turbines placement optimization. Finally, nowadays, there is no standard or procedure to consider this highly complex situation, and so the present work aims to be the initial guide.

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“…The studies of Altan et al [28] introduce a new concentrator arrangement to improve the performance of Savonius type vertical axis wind turbines. The diffuser type concentrator was placed in front of the rotor preventing the negative torque opposite the rotor rotation.…”

Section: Vertical Axis Wind Turbinementioning

confidence: 99%

Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi

Şahi̇n¹,

İlhan²,

Bilgili³

2017

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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Renewable energy technologies play an important role in contribution of global energy demand as well as conservation of the environment. Researchers have realized that wind turbines combined with a diffuser increase efficiency and start generating electricity with a lower wind speed. It is also expected that increasing efficiency of wind turbine results in reduction of energy generation cost. In this respects, designing wind turbine running with high efficiency with a lower wind speed needs further research and development. In this study, performance indicators of variety geometrically structured horizontal and vertical axis wind turbine technologies which their output power augmented through utilization of diffusers were investigated in detail. Keywords: Diffuser, Renewable energy, Wind turbine Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi ÖzKüresel enerji ihtiyacının temin edilmesi ve çevrenin korunumu üzerine katkının sağlanmasında, yenilenebilir enerji teknolojileri önemli rol oynamaktadır. Araştırmacılar, yayıcı ile birleştirilmiş rüzgar türbinlerinin verimliliği artırdığını ve daha düşük rüzgar hızlarında elektrik üretimine başladıklarını fark etmişlerdir. İlaveten, rüzgar türbinine ait verimin artırılması, enerji üretim maliyetinin düşmesine sebep olmaktadır. Bu bakımdan, yüksek verimde ve daha düşük rüzgar hızında çalışan rüzgar türbinlerinin tasarımı ilave araştırma ve geliştirmeye ihtiyaç duymaktadır. Bu çalışmada, yayıcı ile güçlendirilmiş yatay ve dikey eksenli türbin teknolojilerinin farklı geometrilerdeki performans göstergeleri detaylı bir şekilde incelenmiştir.

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An experimental study on improvement of a Savonius rotor performance with curtaining

Cited by 163 publications

References 15 publications

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

Computational Fluid Dynamics Prediction of a Modified Savonius Wind Turbine with Novel Blade Shapes

Wind turbines design corrections for next Galicia climatic conditions

Yayıcı ile Güçlendirilmiş Rüzgar Türbini Teknolojilerinin İncelenmesi

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