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Mechanism associated with the Space Shuttle main engine oxidizer valve/duct system anomalous high amplitude discrete acoustical excitationAnomalous high frequency pressure fluctuations in the Space Shuttle main engine have been experienced during hot firings. Through diagnostic analysis of hot firing engine data, it was determined that this excitation originated at the main oxidizer valve. The intensity of these fluctuations was such that the main oxidizer valve was partially consumed in fire, experienced fretting, and had seal damage. Delineated in this paper are the associated dynamical phenomena and the methodologies leading toward understanding the excitation mechanism. The results presented demonstrate that the source of the anomalous frequencies was suppressed by a simple fix and all main oxidizer valve damage was terminated.
Document ID
19800050901
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Schutzenhofer, L. A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Jones, J. H.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Jewell, R. E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Ryan, R. S.
(NASA Marshall Space Flight Center Huntsville, Ala., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
AIAA PAPER 80-0781
Meeting Information
Meeting: Structures, Structural Dynamics, and Materials Conference
Location: Seattle, WA
Start Date: May 12, 1980
End Date: May 14, 1980
Accession Number
80A35071
Distribution Limits
Public
Copyright
Other

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