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Heat exchange in horizontal helium two-phase flow

✍ Scribed by D. Neuvéglise; Ph. Brédy; M.X. François; C. Meuris

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
256 KB
Volume
34
Category
Article
ISSN
0011-2275

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✦ Synopsis

We studied heat transfer between copper tube and two-phase helium for different flow patterns. We can reach stratified wavy, intermittent and dispersed flow. The copper cell have two temperature sensors placed on top and bottom of the tube. For all flow regimes the upper and lower sensors record different heating in spite of the copper high thermal conductivity. The temperature ratio between upper and lower sensors can be up to 20. This difference vanishes for dispersed flow. Moreover, for both intermittent and stratified wavy flow, the boiling crisis occurs for heat flux of about 2 000 Wm "2 and for the whole section. As expected no boiling crisis appears for dispersed flow.

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