THE OCCURRENCE OF UPSTREAM DRY OUT IN UNIFORMLY HEATED CHANNELS

1 January 1974

conference paper
Published by Begell House

https://doi.org/10.1615/ihtc5.610

Abstract

At mass flows greater than 4000 kg/m².s and qualities between 8% and 45%, dryout was observed in Freon-12 upstream from the outlet end of a uniformly heated tubular test section. Upstream dryout has also been observed during other high mass flow experiments: in Freon-12 in multi-rod bundles at the above conditions and in steam-water in tubes at Freon equivalent conditions. Upstream dryout is postulated to occur as a consequence of deterioration of the heat transport properties near the wall in the high mass velocity froth flow regime.

Keywords

UPSTREAM
HEAT
FLOW
SUP
FROTH
OUTLET
TUBULAR
POSTULATED
KG/M
DETERIORATION

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