Subcooled boiling of downward flow in a vertical annulus
Measurements of steady state pressure drop were made for the downward flow of water in a vertical annulus at low pressure. The inner wall was uniformly heated to allow subcooled boiling. The minimum in the test section demand curve was compared to the onset of significant void (OSV) at the exit of the annulus. As expected, OSV was found to serve as a conservative predictor for avoiding flow excursions. However, at low flow rates the demand curve minima were significantly different from those obtained for upward flow. Similarly, conditions for OSV in downward flow were not predicted by the correlation of Saha and Zuber. More data are needed to establish a general correlation for OSV in downward flow. 14 refs., 9 figs.
- Research Organization:
- Savannah River Lab., Aiken, SC (USA)
- DOE Contract Number:
- AC09-76SR00001
- OSTI ID:
- 5968440
- Report Number(s):
- DP-MS-88-217; CONF-890819-1; ON: DE89005320
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOILING
DATA
DIAGRAMS
ENERGY TRANSFER
EQUATIONS
EXPERIMENTAL DATA
FLOW RATE
FLOWSHEETS
FLUID FLOW
FLUID MECHANICS
HEAT TRANSFER
HYDRAULICS
INFORMATION
MASS TRANSFER
MECHANICS
MOMENTUM TRANSFER
NUMERICAL DATA
PHASE TRANSFORMATIONS
PRESSURE DROP
SUBCOOLED BOILING
TWO-PHASE FLOW
VOID FRACTION