Considerations in predicting burnout of cylinders in flow boiling

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2911245· OSTI ID:5126806

Sadasivan, P; Lienhard, J H ^[1]

---

1. Univ. of Houston, TX (United States)

Previous investigations of the critical heat flux in flow boiling have resulted in widely different hydrodynamic mechanisms for the occurrence of burnout. Results of the present study indicate that existing models are not completely realistic representations of the process. The present study sorts out the influences of the far-wake bubble breakoff and vapor sheet characteristics, gravity, surface wettability, and heater surface temperature distribution on the peak heat flux in flow boiling on cylindrical heaters. The results indicate that burnout is dictated by near-surface effects. The controlling factor appears to be the vapor escape pattern close to the heater surface. It is also shown that a deficiency of liquid at the downstream end of the heater surface is not the cause of burnout.

• OSTI ID: 5126806
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 114:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOILING
BURNOUT
CRITICAL HEAT FLUX
CROSSFLOW SYSTEMS
CYLINDERS
FLUID MECHANICS
HEAT FLUX
HEATERS
HYDRODYNAMICS
MATHEMATICAL MODELS
MECHANICS
PHASE TRANSFORMATIONS
TEMPERATURE DISTRIBUTION
WETTABILITY