X-ray Observations of Flow Patterns in a Mercury Boiler |
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Page 7
... preheater and superheater were also independently heated . Electrical resistance heater elements were used to heat each of the five separately heated zones from the preheater through the superheater ( fig . 1 ) . Each heater element was ...
... preheater and superheater were also independently heated . Electrical resistance heater elements were used to heat each of the five separately heated zones from the preheater through the superheater ( fig . 1 ) . Each heater element was ...
Page 8
... heater element- 0 CM 1 2.5 C - 67-1176 Figure 8. Cutaway mockup of insulation and electric heater element used to heat loop boiler - superheater . The vapor throttle was a metallic , weld - sealed needle valve . The inlet tube ex ...
... heater element- 0 CM 1 2.5 C - 67-1176 Figure 8. Cutaway mockup of insulation and electric heater element used to heat loop boiler - superheater . The vapor throttle was a metallic , weld - sealed needle valve . The inlet tube ex ...
Page 15
... different positions near the insert . The streamlet was sharply defined and highly stable in this part of the boiler . End of insert Heater element ( a ) Helical mercury 15 Boiler-Super heater Flow Patterns Helical streamlet.
... different positions near the insert . The streamlet was sharply defined and highly stable in this part of the boiler . End of insert Heater element ( a ) Helical mercury 15 Boiler-Super heater Flow Patterns Helical streamlet.
Page 16
Alex Vary. End of insert Heater element ( a ) Helical mercury streamlet at end of insert . Net flow Net flow C - 70-174 ( b ) - Helical mercury streamlet 2 inches ( 5.08 cm ) downstream of insert end . Figure 13. - X - ray images of ...
Alex Vary. End of insert Heater element ( a ) Helical mercury streamlet at end of insert . Net flow Net flow C - 70-174 ( b ) - Helical mercury streamlet 2 inches ( 5.08 cm ) downstream of insert end . Figure 13. - X - ray images of ...
Common terms and phrases
adiabatic appendix axially Baker chart boiler exit boiler inlet boiler insert zone Boiler satura boiler surface boiler wall boiler-superheater boiling bubbles centrifugal forces cm/sec condensate column corrosion results corrosive attack downstream droplets figure 11 flow and pressure flow conditions FLOW PATTERN OBSERVATIONS flow pattern regime Flowmeter pressure drop gas flow heat flux heater element helical groove helical liquid helical stream helical streamlet Inlet pressure Insert cylinder kg/sec Lewis Research Center liquid carryover liquid film terminal liquid mercury liquid phase liquid streamlet mass flow rate mercury loop metastable intervals metastable oscillations motion picture N/m² abs NASA NASA TN nucleation zone observed flow patterns oscillations and excursions phase separation pounds per hour Preheater psia pump radial acceleration saturation pressure shown in figure Slug stratified flow superheater surface tension swirling device tangential velocity thermocouples two-phase flow two-phase inception vapor quality vapor throttle wall contact wave X-ray image system X-ray system