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Heating experiments for flowability improvement of near-freezing aviation fuelAn experimental jet fuel with a -33 C freezing point was chilled in a wing tank simulator with superimposed fuel heating to improve low temperature flowability. Heating consisted of circulating a portion of the fuel to an external heat exchanger and returning the heated fuel to the tank. Flowability was determined by the mass percent of unpumpable fuel (holdup) left in the simulator upon withdrawal of fuel at the conclusion of testing. The study demonstrated that fuel heating is feasible and improves flowability as compared to that of baseline, unheated tests. Delayed heating with initiation when the fuel reaches a prescribed low temperature limit, showed promise of being more efficient than continuous heating. Regardless of the mode or rate of heating, complete flowability (zero holdup) could not be restored by fuel heating. The severe, extreme-day environment imposed by the test caused a very small amount of subfreezing fuel to be retained near the tank surfaces even at high rates of heating. Correlations of flowability established for unheated fuel tests also could be applied to the heated test results if based on boundary-layer temperature or a solid index (subfreezing point) characteristic of the fuel. Previously announced in STAR as N82-26483
Document ID
19840044168
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Friedman, R.
(NASA Lewis Research Center Fuels Research Section, Cleveland, OH, United States)
Stockemer, F. J.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1984
Publication Information
Publication: Journal of Aircraft
Volume: 21
ISSN: 0021-8669
Subject Category
Propellants And Fuels
Accession Number
84A26955
Funding Number(s)
CONTRACT_GRANT: NAS3-21977
Distribution Limits
Public
Copyright
Other

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