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Aerodynamic characteristics of a five bladed S-shaped savonius rotor

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dc.contributor.advisor Quamrul Islam, Dr. Md.
dc.contributor.author Nayem Ashraf, MD.
dc.date.accessioned 2017-03-08T04:14:29Z
dc.date.available 2017-03-08T04:14:29Z
dc.date.issued 2016-03
dc.identifier.uri http://lib.buet.ac.bd:8080/xmlui/handle/123456789/4320
dc.description.abstract The S-shaped rotor is a modification of the Savonius rotor with no overlap. Drag and torque coefficients of a five bladed S-shaped Savonius rotor have been investigated by measuring the pressure distribution on the blade surfaces for various rotor angles. The experiments have been carried out at a Reynolds number of 2.1x105 in a uniform flow jet produced by an open circuit wind tunnel. To calculate drag force and torque in non-dimensional form, the data are taken on 12 pressure tapping points on each blade of the five bladed S-shaped Savonius rotor for every 100 interval of the angle of rotation. The pressure distributions both on the concave and convex surface of the blade at different angle of rotation are presented graphically. At rotor angle α = 400, difference of pressure coefficient on convex surface and concave surface is maximum. At rotor angle α = 3100, difference of pressure coefficient on convex surface and concave surface is minimum. The measurements indicate that drag forces and the torque, vary with rotor angle. The normal drag coefficient increases with the rotor angle, reaches its maximum value at the rotor angle α = 400, remains approximately constant value at the rotor angle α = 1400 to 2100 and minimum value at the rotor angle α = 3100. The tangential drag coefficient increases with the rotor angle, reaches its maximum value at the rotor angle α = 2900 and minimum value at the rotor angle α = 00. The torque coefficient also increases with the rotor angle, reaches its maximum value at the rotor angle α = 400, remains approximately constant value at the rotor angle α = 1400 to 2100 and reaches minimum value at the rotor angle α = 3100. The result facilitates predicting the performance of five bladed S-shaped Savonius rotor under dynamic conditions. en_US
dc.language.iso en en_US
dc.publisher Department of Mechanical Engineering (ME) en_US
dc.subject Renewable energy en_US
dc.title Aerodynamic characteristics of a five bladed S-shaped savonius rotor en_US
dc.type Thesis-MSc en_US
dc.contributor.id 0411102047 F en_US
dc.identifier.accessionNumber 114306
dc.contributor.callno 333.79/NAY/2016 en_US


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