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Probabilistic Aeroelastic Analysis of Turbomachinery ComponentsA probabilistic approach is described for aeroelastic analysis of turbomachinery blade rows. Blade rows with subsonic flow and blade rows with supersonic flow with subsonic leading edge are considered. To demonstrate the probabilistic approach, the flutter frequency, damping and forced response of a blade row representing a compressor geometry is considered. The analysis accounts for uncertainties in structural and aerodynamic design variables. The results are presented in the form of probabilistic density function (PDF) and sensitivity factors. For subsonic flow cascade, comparisons are also made with different probabilistic distributions, probabilistic methods, and Monte-Carlo simulation. The approach shows that the probabilistic approach provides a more realistic and systematic way to assess the effect of uncertainties in design variables on the aeroelastic instabilities and response.
Document ID
20040074351
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Reddy, T. S. R. (Toledo Univ. OH, United States)
Mital, S. K. (Toledo Univ. OH, United States)
Stefko, G. L. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
May 1, 2004
Subject Category
Structural Mechanics
Report/Patent Number
NASA/TM-2004-213063
E-14528
Funding Number(s)
WBS: WBS 781-30-10
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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