NDLI: Application of a linearized unsteady aerodynamic analysis to standard cascade configurations

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Application of a linearized unsteady aerodynamic analysis to standard cascade configurations

Content Provider	NASA Technical Reports Server (NTRS)
Author	Usab Jr., W. J. Verdon, J. M.
Copyright Year	1986
Description	A linearized potential flow analysis, which accounts for the effects of nonuniform steady flow phenomena on the linearized unsteady aerodynamic response to prescribed blade motions, has been applied to five cascade configurations. These include the first, fifth, eighth and ninth standard configurations proposed as a result of the Second International Symposium on Aeroelasticity in Turbomachines and a NASA Lewis flutter cascade. Selected results from this study, including comparisons between analytical predictions and the experimental measurements submitted for three of the foregoing configurations, are described. The correlation between theory and experiment for the first standard configuration (a compressor cascade operating at low Mach number and frequency) is quite good. Moreover, the predictions and measurements for the NASA Lewis cascade of symmetric biconvex airfoils show good qualitative agreement. However, wide discrepancies exist between the theoretical predictions and the experimental measurements for the fifth standard configuration (a subsonic transonic fan tip cascade). These can be partially attributed to conditions being imposed in the experiment which differ from those commonly used in unsteady aerodynamic analyses.
File Size	1321208
Page Count	63
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19860012034
Archival Resource Key	ark:/13960/t4vj0f15d
Language	English
Publisher Date	1986-01-01
Access Restriction	Open
Subject Keyword	Aerodynamics Turbomachine Blades Blade Tips Cascade Flow Aerodynamic Configurations Unsteady Aerodynamics Airfoils Flutter Unsteady Flow Fan Blades Potential Flow Linearization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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