Premature transition to stable film boiling initiated by power transients in liquid nitrogen

We have investigated transient pool boiling in liquid nitrogen for a process in which the boiling is initiated by a step-function application of power to a thin wire immersed in the liquid. For such a process we find that a transition to stable film boiling can be observed for power values as low as...

Full description

Saved in:
Bibliographic Details
Published in:Cryogenics (Guildford) 1979-01, Vol.19 (4), p.225-230
Main Authors: Sinha, D.N., Brodie, L.C., Semura, J.S., Young, F.M.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have investigated transient pool boiling in liquid nitrogen for a process in which the boiling is initiated by a step-function application of power to a thin wire immersed in the liquid. For such a process we find that a transition to stable film boiling can be observed for power values as low as about 40% of the steady-state peak heat flux. Such a ‘premature transition’ to stable film boiling can occur, even though the maximum observed values attained by the transient heat flux may lie substantially below the steady-state peak heat flux. Heating wires of platinum, copper, and constantan were employed in this investigation. Steady-state measurements are presented for comparison with the transient results, and a demonstration of the inhibition of the premature transition is described using a form of forced convection around the test wire.
ISSN:0011-2275
1879-2235
DOI:10.1016/0011-2275(79)90023-7