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Electric field and radio frequency measurements for rocket engine health monitoring applicationsElectric-field (EF) and radio-frequency (RF) emissions generated in the exhaust plumes of the diagnostic testbed facility thruster (DTFT) and the SSME are examined briefly for potential applications to plume diagnostics and engine health monitoring. Hypothetically, anomalous engine conditions could produce measurable changes in any characteristic EF and RF spectral signatures identifiable with a 'healthly' plumes. Tests to determine the presence of EF and RF emissions in the DTFT and SSME exhaust plumes were conducted. EF and RF emissions were detected using state-of-the-art sensors. Analysis of limited data sets show some apparent consistencies in spectral signatures. Significant emissions increases were detected during controlled tests using dopants injected into the DTFT.
Document ID
19920067630
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Valenti, Elizabeth L.
(Sverdrup Technology, Inc.; NASA, Stennis Space Center Bay Saint Louis, MS, United States)
Date Acquired
August 15, 2013
Publication Date
October 1, 1992
Publication Information
Publication: Journal of Propulsion and Power
Volume: 8
Issue: 5, Se
ISSN: 0748-4658
Subject Category
Spacecraft Propulsion And Power
Accession Number
92A50254
Distribution Limits
Public
Copyright
Other

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