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Page 17
In the second flow pattern regime, the liquid streamlet still flowed essentially
helically in the grooves, but it consisted of a ... direction). ing ended and
essentially "dry wall" began. The liquid film. 17 Diffuse helical streamlet Liquid
film terminal.
In the second flow pattern regime, the liquid streamlet still flowed essentially
helically in the grooves, but it consisted of a ... direction). ing ended and
essentially "dry wall" began. The liquid film. 17 Diffuse helical streamlet Liquid
film terminal.
Page 18
The liquid film terminal was not strictly a separate flow regime. Instead, it was a
locus where observations revealed a thinning of the bulk liquid streamlet into a
uniform film covering the boiler wall. This evidence of rather uniform film
coverage ...
The liquid film terminal was not strictly a separate flow regime. Instead, it was a
locus where observations revealed a thinning of the bulk liquid streamlet into a
uniform film covering the boiler wall. This evidence of rather uniform film
coverage ...
Page 25
eliminate the possibility that metastable interactions were transmitted through the
liquid leg. ... indicated that there was a coupling between the nucleation
phenomena and the flow patterns seen in the vicinity of the liquid film terminal.
eliminate the possibility that metastable interactions were transmitted through the
liquid leg. ... indicated that there was a coupling between the nucleation
phenomena and the flow patterns seen in the vicinity of the liquid film terminal.
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Contents
SUMMARY | 1 |
OPERATING CONDITIONS | 10 |
PREVIOUS FLOW PATTERN OBSERVATIONS | 20 |
2 other sections not shown
Common terms and phrases
adiabatic appendix Baker chart boiler inlet boiler insert zone Boiler satura boiler surface boiler wall boiler-superheater boiling bulk liquid centrifugal forces cm/sec condensate column corrosion results corrosive attack dewetting Diffuse helical streamlet downstream droplets entrained figure 11 flow and pressure flow conditions FLOW PATTERN OBSERVATIONS flow pattern regime flow rate Flowmeter pressure drop gas flow heat flux Heat Transfer heater element helically grooved helically swaged boiler kg/sec Lewis Research Center liquid carryover liquid film terminal liquid mercury liquid phase mass transfer mercury boiler mercury flow mercury loop metastable intervals metastable oscillations N/m abs NASA NASA TN nucleation zone observed flow patterns oscillations and excursions phase separation pounds per hour preheater psia radial acceleration saturation pressure shown in figure stratified flow superheater surface tension swaged boiler tube swirling device tangential velocity thermocouples two-phase flow two-phase inception two-phase mercury vapor throttle wall contact wave X-ray image system X-ray system
Bibliographic information
| Title | X-ray Observations of Flow Patterns in a Mercury Boiler Volume 5693 of NASA technical note |
| Author | Alex Vary |
| Contributors | United States. National Aeronautics and Space Administration, Lewis Research Center |
| Publisher | National Aeronautics and Space Administration, 1970 |
| Length | 36 pages |
| Export Citation | BiBTeX EndNote RefMan |