Inverted annular flow experimental study
Technical Report
·
OSTI ID:5497317
Steady-state inverted annular flow of Freon 113 in up flow was established in a transparent test section. Using a special inlet configuration consisting of long aspect-ratio liquid nozzles coaxially centered within a heated quartz tube, idealized inverted annular flow initial geometry (cylindrical liquid core surrounded by coaxial annulus of gas) could be established. Inlet liquid and gas flowrates, liquid subcooling, and gas density (using various gas species) were measured and varied systematically. The hydrodynamic behavior of the liquid core, and the subsequent downstream break-up of this core into slugs, ligaments and/or droplets of various sizes, was observed. In general, for low inlet liquid velocities it was observed that after the initial formation of roll waves on the liquid core surface, an agitated region of high surface area, with attendant high momentum and energy transfers, occurs. This agitated region appears to propagate downsteam in a quasi-periodic pattern. Increased inlet liquid flow rates, and high gas annulus flow rates tend to diminish the significance of this agitated region. Observed inverted annular flow (and subsequent downstream flow pattern) hydrodynamic behavior is reported, and comparisons are drawn to data generated by previous experimenters studying post-CHF flow.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5497317
- Report Number(s):
- NUREG/CR-4277; ANL-85-31; ON: TI85012805
- Country of Publication:
- United States
- Language:
- English
Similar Records
Flow visualization study of post critical heat flux region for inverted bubbly, slug and annular flow regimes
Two-phase flow characteristic of inverted bubbly, slug and annular flow in post-critical heat flux region
Two-phase flow regime transition criteria in post-dryout region based on flow visualization experiments
Technical Report
·
Mon Oct 31 23:00:00 EST 1988
·
OSTI ID:6572255
Two-phase flow characteristic of inverted bubbly, slug and annular flow in post-critical heat flux region
Conference
·
Thu Dec 31 23:00:00 EST 1987
·
OSTI ID:6473428
Two-phase flow regime transition criteria in post-dryout region based on flow visualization experiments
Technical Report
·
Mon Jun 01 00:00:00 EDT 1987
·
OSTI ID:6302828
Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
BOILING
CRITICAL HEAT FLUX
DROPLETS
DRYOUT
FILM BOILING
FLUID FLOW
FLUID MECHANICS
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT FLUX
HYDRODYNAMICS
MECHANICS
NOZZLES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PARTICLES
PHASE TRANSFORMATIONS
STEADY-STATE CONDITIONS
TEST FACILITIES
TWO-PHASE FLOW
220900* -- Nuclear Reactor Technology-- Reactor Safety
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
BOILING
CRITICAL HEAT FLUX
DROPLETS
DRYOUT
FILM BOILING
FLUID FLOW
FLUID MECHANICS
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT FLUX
HYDRODYNAMICS
MECHANICS
NOZZLES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PARTICLES
PHASE TRANSFORMATIONS
STEADY-STATE CONDITIONS
TEST FACILITIES
TWO-PHASE FLOW