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Influence of noncondensable gases on thermodynamic control on-ground experiments using a substitute fluid

Mer, Samuel and Thibault, Jean-Paul and Corre, Christophe Influence of noncondensable gases on thermodynamic control on-ground experiments using a substitute fluid. (2017) Journal of Thermal Science and Engineering Applications, vol. 10. ISSN 1948-5085

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Official URL: http://dx.doi.org/10.1115/1.4037449

Abstract

A cryogenic propellant submitted to heat load during long duration space missions tends to vaporize to such an extent that the resulting pressure rise must be controlled to prevent storage failure. The Thermodynamic Vent System TVS), one of the possible control strategies, has been investigated using on-ground experiments with NOV EC 1230 as substitution fluid. Results obtained for self-pressurization and TVS control phases have been reported in a previous work. The unexpected inverse thermal stratification observed during these experiments is analyzed in the present work and related to the influence of non-condensable gases. Non-condensable gases, present inside the tank in the form of nitrogen - 10 times lighter than the substitution fluid vapor - generate a concentration stratification in the ullage. Assuming the NOV EC 1230 remains at saturation in the whole ullage, the density stratification which results from this concentration stratification can explain the observed inverse thermal stratification.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut National Polytechnique de Grenoble (FRANCE)
Other partners > Institut National des Sciences Appliquées de Lyon - INSA (FRANCE)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > Université Claude Bernard-Lyon I - UCBL (FRANCE)
Other partners > Ecole Centrale de Lyon (FRANCE)
Laboratory name:
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Deposited By: Samuel MER
Deposited On:20 Sep 2017 10:31

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