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Journal articles
Quench cooling under reduced gravity
Abstract : We report quench cooling experiments performed with liquid O2 under different levels of gravity, simulated
with magnetic gravity compensation. A copper disk is quenched from 300 to 90 K. It is found that the cooling
time in microgravity is very long in comparison with any other gravity level. This phenomenon is explained by
the insulating effect of the gas surrounding the disk. A weak gas pressurization (which results in subcooling of
the liquid with respect to the saturation temperature) is shown to drastically improve the heat exchange, thus
reducing the cooling time (about 20 times). The effect of subcooling on the heat transfer is analyzed at different
gravity levels. It is shown that this type of experiment cannot be used for the analysis of the critical heat flux of
the boiling crisis. The film boiling heat transfer and the minimum heat flux of boiling are analyzed as functions
of gravity and subcooling.
https://hal-cea.archives-ouvertes.fr/cea-01481067
Contributor : Dominique Girard <>
Submitted on : Thursday, March 2, 2017 - 11:00:51 AM
Last modification on : Wednesday, November 4, 2020 - 3:01:20 PM
Long-term archiving on: : Wednesday, May 31, 2017 - 1:21:57 PM
Contributor : Dominique Girard <>
Submitted on : Thursday, March 2, 2017 - 11:00:51 AM
Last modification on : Wednesday, November 4, 2020 - 3:01:20 PM
Long-term archiving on: : Wednesday, May 31, 2017 - 1:21:57 PM
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1303.6217.pdf
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