Velocity Scaled Aeroelastic Testing of Advanced Turboprops PUBLIC ACCESS

[+] Author Affiliations
Edward F. Crawley, Eric H. Ducharme

Massachusetts Institute of Technology, Cambridge, MA

Paper No. 87-GT-209, pp. V001T01A072; 11 pages
  • ASME 1987 International Gas Turbine Conference and Exhibition
  • Volume 1: Turbomachinery
  • Anaheim, California, USA, May 31–June 4, 1987
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7923-8
  • Copyright © 1987 by ASME


An innovative experimental procedure for the sub-velocity scale testing of anisotropic aeroelastic models is developed and applied to the Advanced Turboprop. The scaling laws for an anisotropic, rotating model are developed. These scaling laws indicate that by proper choice of model geometry, stiffness, and density, all of the important aeroelastic similarity parameters can be satisfied in a full-velocity scaled test. In a sub-velocity scaled test, all the similarity parameters except for the Mach number can be matched. The development of the model building technology to construct reduced stiffness anisotropic models for sub-velocity scaled testing is then reviewed. In order to experimentally verify the sub-velocity scaled procedure, a propeller model was constructed based on the G.E. UDF MPS model, and the aeroelastic and performance data are favorably compared. Finally, as an illustration of the versatility of the sub-velocity scaled approach, the model is used to demonstrate the sensitivity of ATP blade flutter to mass distribution.

Copyright © 1987 by ASME
Topics: Testing
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