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'Coriolis resonance' within a rotating ductAn investigation of the unsteady disturbances of a fixed frequency within a radial duct rotating at a set speed is presented. The flow is assumed to be compressible, inviscid, and of a fluid which is a perfect gas. Equations are developed for the steady and the unsteady parts of the flow in cylindrical coordinates. The unsteady disturbances are expressed by Fourier decomposition in angular position, distance into the duct, and in time. It is found that a resonance is possible when the frequency of flow disturbances is twice the shaft-rotation frequency, considering only the radial and tangential disturbances and not the radial and circumferential disturbances. The particular point at which the resonance occurs indicates the occurrence is due to the Coriolis force, which is only present in the radial and tangential directions. It is noted that the Coriolis force can only be present in open-ended ducts, such as those found in centrifugal compressors.
Document ID
19820054403
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kurosaka, M.
(Tennessee Univ. Space Inst. Tullahoma, TN, United States)
Caruthers, J. E.
(Tennessee, University Tullahoma, TN, United States)
Date Acquired
August 10, 2013
Publication Date
August 1, 1982
Publication Information
Publication: AIAA Journal
Volume: 20
Subject Category
Aerodynamics
Accession Number
82A37938
Funding Number(s)
CONTRACT_GRANT: NAG3-86
Distribution Limits
Public
Copyright
Other

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