Vapor locking and heat transfer under transient and steady state conditions

Conference · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.1007/978-1-4613-9856-1_50· OSTI ID:6007451

Chen, C J; Wang, S T; Dawson, J W

The study was undertaken to determine the vapor locking in the cooling channels of a cryostable superconducting magnet, to investigate the heat transfer characteristics under steady state and transient conditions, and to study the effects of vapor accumulation of the multiple coil layers. Based on the experimental results obtained the following conclusions can be made: (1) the critical steady state heat flux for the transition from nucleate boiling to film boiling is about 0.4 w/cm/sup 2/; (2) the critical transient energy density for the boiling transition is about 100 mJ/cm/sup 3/; (3) the front channel is easier to reach the film boiling regime than rear channel, due to that the wetted area of front side is more than the wetted area of rear side; and (4) no temperature rise greater than 1/sup 0/K is possible if the heat flux does not exceed the critical heat flux under steady state condition or the energy density does not exceed the critical energy density under transient condition.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6007451
• Report Number(s): CONF-790815-19
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COOLING SYSTEMS
CRITICAL HEAT FLUX
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENERGY TRANSFER
EQUIPMENT
EVEN-EVEN NUCLEI
HEAT FLUX
HEAT TRANSFER
HELIUM 4
HELIUM I
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETS
NUCLEI
STABLE ISOTOPES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
TRANSIENTS