EXPERIMENTAL OBSERVATIONS OF UPSTREAM BOILING BURNOUT

Technical Report · Fri Jun 01 04:00:00 EDT 1962

OSTI ID:4762328

Anderson, J K; Waters, E D; Batch, J M

Boiling burnout conditions are usually postulated and observed to occur at the outlet end of uniformly heated test sections. However, during experiments with flow through a 12-ft cylindrical test section, boiling burnout conditions were sometimes observed to begin at various upstream locations. These conditions were observed at mass velocities of 5.0 x 10/sup 6/ lb/hr-ft/sup 2/ and higher, but not at lower mass velocities. Local qualities for upstream burnout were 1O to 30 wt% at a pressure of 1500 psig. Similar results were obtained with both vertical and horizontal test section positioning. In some experiments the heat flux was increased beyond the initial detection of boiling buinout (film boiling), allowing the film boiling condition to spread along the test section. It was found that the temperature excursion which was experienced in going from nucleate to film boiling conditions was greater as the film boiling condition moved upstream to lower quality regions. Heat fluxes with upstream burnout were generally higher than those for downstream burnout with comparable enthalpies. Also, the upstream burnout cases resulted in conditions at the test section outlet which were at much higher heat fluxes than those which might have been expected to produce burnout. (auth)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• DOE Contract Number: AT(45-1)-1350
• NSA Number: NSA-16-031793
• OSTI ID: 4762328
• Report Number(s): HW-73902
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
BURNOUT
CONFIGURATION
DETECTION
ENGINEERING AND EQUIPMENT
FILMS
FLUID FLOW
HEATING
LABORATORY EQUIPMENT
MASS
NUCLEATE BOILING
PRESSURE
TEMPERATURE
THERMODYNAMICS
TUBES
VELOCITY
ZONES