Peak nucleate boiling fluxes for liquid oxygen on a flat horizontal platinum surface at buoyancies corresponding to accelerations between −0.03 and lgE
✍ Scribed by D. N. Lyon; M. C. Jones; G. L. Ritter; C. I. Chiladakis; P. G. Kosky
- Publisher
- American Institute of Chemical Engineers
- Year
- 1965
- Tongue
- English
- Weight
- 996 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0001-1541
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✦ Synopsis
Peak nucleate boiling fluxes for liquid oxygen near 1 atm. have been measured on a 0.75-in.diameter flat polished horizontal platinum surface located in a known, variable magnetic-field gradient that produced steady accelerations (which could be mointoined indefinitely) on the oxygen acting in opposition to the earth's gravitation, gE. Measurements were made under conditions ranging from net negative (directed away from the heated surface) accelerations of -0.03~~ acting on the bulk liquid to the normal accelerations, 1.ogE. The results indicate that a t zero g conditions for the bulk liquid, the peak nucleate boiling flux is -0.55 of the value a t 1.09~. For bulk-liquid accelerations ranging from -0.25 to lgE, the experimental results confirm the '/4 power dependence of peak flux on acceleration as predicted by various correlations. However, below 0.2593 the peak flux becomes insensitive to the acceleration, varying approximately in proportion to the 1/14 power of the net acceleration. At bulk-liquid conditions of zero g (+O.O05g~) the peak flux breaks sharply and falls by a factor of 10 between zero g and -0.03g~ (for this apparatus).