Smooth Curvature of Airfoils Meanline for a General Turbomachinery Geometry Generator
Nemnem, A., Turner, M. (2015). Smooth Curvature of Airfoils Meanline for a General Turbomachinery Geometry Generator. EKB Journal Management System, 16(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 – May 26 - 28, 2015), 1-31. doi: 10.21608/asat.2015.23012
Ahmed F. Nemnem; Mark G. Turner. "Smooth Curvature of Airfoils Meanline for a General Turbomachinery Geometry Generator". EKB Journal Management System, 16, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 – May 26 - 28, 2015, 2015, 1-31. doi: 10.21608/asat.2015.23012
Nemnem, A., Turner, M. (2015). 'Smooth Curvature of Airfoils Meanline for a General Turbomachinery Geometry Generator', EKB Journal Management System, 16(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 – May 26 - 28, 2015), pp. 1-31. doi: 10.21608/asat.2015.23012
Nemnem, A., Turner, M. Smooth Curvature of Airfoils Meanline for a General Turbomachinery Geometry Generator. EKB Journal Management System, 2015; 16(AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 – May 26 - 28, 2015): 1-31. doi: 10.21608/asat.2015.23012

Smooth Curvature of Airfoils Meanline for a General Turbomachinery Geometry Generator

International Conference on Aerospace Sciences and Aviation Technology
Article 73, Volume 16, AEROSPACE SCIENCES & AVIATION TECHNOLOGY, ASAT - 16 – May 26 - 28, 2015, May 2015, Page 1-31  XML PDF (2.94 MB)
Document Type: Original Article
DOI: 10.21608/asat.2015.23012
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Authors
Ahmed F. Nemnem1; Mark G. Turner2
1Aircraft and Aerospace Department, Military Technical College, Cairo, Egypt.
2School of Aerospace Systems, University of Cincinnati, Cincinnati, Ohio.
Abstract
The blade geometry design process is integral to the development and advancement of compressors and turbines in gas turbines or aeroengines. An airfoil section design feature has been added to a previously developed open source parametric 3D blade design tool. The second derivative of the mean-line (related to the curvature) is controlled using B-splines to create the airfoils. This is analytically integrated twice to obtain the mean-line. A smooth thickness distribution is then added to the airfoil with two options either the Wennerstrom distribution or a quartic B-spline thickness distribution. B-splines have also been implemented to achieve customized airfoil leading and trailing edges. Geometry for a turbine, compressor, and transonic fan are presented along with a demonstration of the importance of airfoil smoothness.
Keywords
Meanline; Curvature; Geometry; Turbomachinery
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