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Thermal Acoustic Oscillation: Causes, Detection, Analysis, and PreventionThermal Acoustic Oscillations (TAO) can occur in cryogenic systems and produce significant sources of heat. This source of heat can increase the boil off rate of cryogenic propellants in spacecraft storage tanks and reduce mission life. This paper discusses the causes of TAO, how it can be detected, what analyses can be done to predict it, and how to prevent it from occurring.The paper provides practical insight into what can aggravate instability, practical methods for mitigation, and when TAO does not occur. A real life example of a cryogenic system with an unexpected heat source is discussed, along with how TAO was confirmed and eliminated.
Document ID
20140016759
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Christie, R. J. (NASA Glenn Research Center Cleveland, OH United States)
Hartwig, J. W. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
November 26, 2014
Publication Date
August 4, 2014
Subject Category
Acoustics
Report/Patent Number
GRC-E-DAA-TN16905
Meeting Information
Meeting: Thermal and Fluids Analysis Workshop 2014
Location: Cleveland, OH
Country: United States
Start Date: August 4, 2014
End Date: August 8, 2014
Sponsors: NASA Glenn Research Center
Funding Number(s)
WBS: WBS 645454.04.03.01.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Cryogenics
Sound Waves
Oscillations

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