Sweep in a Transonic Fan Rotor: Part 1 — 3D Geometry Package PUBLIC ACCESS

[+] Author Affiliations
Hazem F. Abdelhamid, Raymond P. Shreeve

Naval Postgraduate School, Monterey, CA

Paper No. 98-GT-578, pp. V001T01A136; 10 pages
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 1: Turbomachinery
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7862-0
  • Copyright © 1998 by ASME


A geometry package was developed which uses six Bezier surfaces to describe an axial compressor blade. The blade is defined by 32 control points and two parameters, which determine the leading and trailing edge extensions. The package was used to represent a reference transonic fan rotor to within machining tolerances, and then to introduce forward and backward sweep holding blade-element design parameters fixed. Blade lean and point geometry manipulations were also demonstrated. All geometries produced by the package are machinable without approximation. The Bezier-surface representation was chosen in order to minimize the number of control points required to specify the blade shape and eventually enable aero-structural-manufacturing optimization.

Copyright © 1998 by ASME
Topics: Rotors , Geometry
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