iipp publishingJournal of Applied Engineering Science


DOI: 10.5937/jaes18-23413
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions. 
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Volume 18 article 669 pages: 132 - 139

Sigit Iswahyudi*
Faculty of Engineering, Universitas Gadjah Mada, Indonesia

Faculty of Engineering, Universitas Gadjah Mada, Indonesia

Faculty of Engineering, Universitas Gadjah Mada, Indonesia

Setyawan Bekti Wibowo
Faculty of Engineering, Universitas Gadjah Mada, Indonesia

Many airfoils could be used to form a wind turbine blade. Different airfoil would result in an altered blade planform and its performance characteristics. Airfoil identification that should be included in the design then becomes an important task. Utilizing Blade Element Momentum Theory computation procedures, eleven types of airfoils were applied in blade geometries of rotors of 2.4 m in diameters. The changes in the distribution of chord lengths, twists, solidity ratio, and Reynolds numbers of the blades were compared as geometry parameters. The designed and off designed powers and thrusts were calculated, and the characteristics of the performance of the rotor were represented by the coefficient of power and coefficient of thrust. The calculated geometries showed that distinct airfoils resulted in different segments sizes of the blades and different performance characteristics of the rotors.The use of an airfoil that has a high lift coefficient and a high glide ratio in the design of a blade will produce a narrow blade and a small solidity ratio. The design will also have a high power coefficient at the tip speed ratio design. However, the blade power coefficient may be sensitive to changes in rotational speed.

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The authors acknowledge LPDP, Ministry of Finance of the Republic of Indonesia, for the fund support of the present work (No. PRJ-4863/LPDP.3/2016).

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