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Compressibility effects in the Kemp-Sears ProblemThe effects of including compressibility in the Kemp-Sears problem of aerodynamic interference between moving blade rows are examined. Methods of linearized, subsonic, plane, unsteady flow are adopted. The major new effect is that a resonance appears at certain combinations of flow Mach number, tip Mach number, and blade vane ratios. The resonance is at exactly the Tyler-Sofrin cutoff condition for rotor-stator interaction. At such conditions the unsteady lift on a blade row due to externally imposed nonstationary upwash vanishes. However, the resonance appears to be very sharp and seems to be more significant as an indication that around this condition the unsteady lift changes very rapidly.
Document ID
19750003124
Document Type
Conference Paper
Authors
Mani, R. (Massachusetts Univ. Amherst, MA, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Publication Information
Publication: Pennsylvania State Univ. Fluid Mech., Acoustics, and Design of Turbomachinery, Pt. 2
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19750003119Analytic PrimaryFluid mechanics, acoustics, and design of turbomachinery, part 2