Prediction of pool void fraction by new drift flux correlation
A void fraction for a bubbling or boiling pool system is one of the important parameters in analyzing heat and mass transfer processes. Using the drift flux formulation, correlations for the pool void fraction have been developed in collaboration with a large number of experimental data. It has been found that the drift velocity in a pool system depends upon vessel diameter, system pressure, gas flux and fluid physical properties. The results show that the relative velocity and void fraction can be quite different from those predicted by conventional correlations. In terms of the rise velocity, four different regimes are identified. These are bubbly, churn-turbulent, slug and cap bubble regimes. The present correlations are shown to agree with the experimental data over wide ranges of parameters such as vessel diameter, system pressure, gas flux and physical properties. 39 refs., 41 figs.
- Research Organization:
- Argonne National Lab., IL (USA). Reactor Analysis and Safety Div.
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 5349033
- Report Number(s):
- NUREG/CR-4657; ANL-86-29; ON: TI86013313; TRN: 86-027824
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
POOL BOILING
VOID FRACTION
TWO-PHASE FLOW
HEAT TRANSFER
MASS TRANSFER
FLUID FLOW
MATHEMATICAL MODELS
NUCLEAR POWER PLANTS
REACTOR CORES
REACTOR VESSELS
BOILING
CONTAINERS
ENERGY TRANSFER
NUCLEAR FACILITIES
PHASE TRANSFORMATIONS
POWER PLANTS
REACTOR COMPONENTS
THERMAL POWER PLANTS
220900* - Nuclear Reactor Technology- Reactor Safety
420400 - Engineering- Heat Transfer & Fluid Flow