Critical heat flux for free convection boiling in thin rectangular channels
Conference
·
OSTI ID:6266691
A review of the experimental data on free convection boiling critical heat flux (CHF) in vertical rectangular channels reveals three mechanisms of burnout. They are the pool boiling limit, the circulation limit, and the flooding limit associated with a transition in flow regime from churn to annular flow. The dominance of a particular mechanism depends on the dimensions of the channel. Analytical models were developed for each free convection boiling limit. Limited agreement with data is observed. A CHF correlation, which is valid for a wide range of gap sizes, was constructed from the CHFs calculated according to the three mechanisms of burnout. 17 refs., 7 figs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6266691
- Report Number(s):
- BNL-45905; CONF-910739--29; ON: DE91018731
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
220600* -- Nuclear Reactor Technology-- Research
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42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
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BOILING
BURNOUT
CRITICAL HEAT FLUX
DRYOUT
ENERGY TRANSFER
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
HEAT FLUX
HEAT TRANSFER
HYDRAULICS
MATHEMATICAL MODELS
MECHANICS
PHASE TRANSFORMATIONS
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REACTOR CHANNELS
REACTOR COMPONENTS
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RESEARCH AND TEST REACTORS
220600* -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
BOILING
BURNOUT
CRITICAL HEAT FLUX
DRYOUT
ENERGY TRANSFER
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
HEAT FLUX
HEAT TRANSFER
HYDRAULICS
MATHEMATICAL MODELS
MECHANICS
PHASE TRANSFORMATIONS
POOL BOILING
REACTOR CHANNELS
REACTOR COMPONENTS
REACTORS
RESEARCH AND TEST REACTORS