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The Effect of Milling Process Induced Coarse Surface Texture on Aerodynamic Turbine Profile Losses

[+] Author Affiliations
Ulrich G. Harbecke, Walter Riess, Joerg R. Seume

University of Hannover, Hannover, Germany

Paper No. GT2002-30333, pp. 81-88; 8 pages
  • ASME Turbo Expo 2002: Power for Land, Sea, and Air
  • Volume 5: Turbo Expo 2002, Parts A and B
  • Amsterdam, The Netherlands, June 3–6, 2002
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3610-X | eISBN: 0-7918-3601-0
  • Copyright © 2002 by ASME


Production time and costs of milled turbine blades can be significantly reduced by increasing the spacing of the cutter paths. In order to quantify the effect of the resulting coarse milling groove texture on profile losses, two different turbine cascades with various cutter path parameters were investigated in a linear cascade wind tunnel. It was found that neither the milling groove spacing nor the stagger angle measured between the grooves and the core flow direction affect the profile loss significantly in the range of typical industrial applications. Therefore, coarsely milled surfaces may be used for cost reduction within the milling parameter ranges investigated.

Copyright © 2002 by ASME



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