Selection of airfoils for straight-bladed vertical axis wind turbines based on desirable aerodynamic characteristics

Islam, Mazharul and Amin, M. Ruhul and Ting, David S-K and Fartaj, Amir (2008) Selection of airfoils for straight-bladed vertical axis wind turbines based on desirable aerodynamic characteristics. In: 2008 International Mechanical Engineering Congress and Exposition, 31st Oct.- 6th Nov. 2008, Boston, Massachusetts, USA.

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Abstract

Selection of the airfoil is crucial for better aerodynamic performance and dimensions of a smaller-capacity SB-VAWT which can compete with conventional energy sources in niche markets like urban areas and off-grid remote applications for diversified applications. Airfoil related design changes also have the potential for increasing the cost effectiveness of VAWTs. Recently, Islam et. al [1] have identified the desirable features of an ideal airfoil for smaller capacity SB-VAWT to improve its starting characteristics and overall performance. They have shortlisted several aerodynamic characteristics of the desirable airfoil. Based on these desirable aerodynamic characteristics, an attempt has been made in this paper to shortlist ten prospective candidate airfoils for smaller-capacity SB-VAWT. This is done using both experimental and analytical characteristics. Nine performance indices have been defined in this paper in light of desirable aerodynamic characteristics to select best performing airfoil. These performance indices are utilized for considering the following desirable aerodynamic characteristics: (i) stall angle at low Reynolds number, (ii) width of the drag bucket, (iii) zero-lift-drag coefficient, (iv) Cl /Cd ratio, (v) maximum lift-coefficient, (vi) deep-stall angle, (vii) roughness sensitivity, (viii) trailing edge noise generation, and (ix) pitching moment. Here, Cl and Cd are coefficients of lift and drag respectively. After determining the value of the performance indices and rating of the candidate airfoils, the most promising airfoil is selected. Among the ten candidate airfoils, overall rating of NASA LS(1)-0417 has been found to be the best.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	7416/56949
Uncontrolled Keywords:	Airfoils for Straight-Bladed Vertical Axis Wind Turbines
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Dr. Mazharul Islam
Date Deposited:	22 May 2017 12:31
Last Modified:	22 May 2017 12:31
URI:	http://irep.iium.edu.my/id/eprint/56949

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