Effect of System Pressure and Liquid Subcooling on Quasi-Steady Nucleate Boiling and its Life for Liquid Helium I

  • A. Sakurai
  • M. Shiotsu
  • K. Hata
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 35)

Abstract

Quasi-steady nucleate boiling with a certain life on a horizontal cylinder in liquid He I caused by a large stepwise heat input, whose height was far beyond the value corresponding to the steady critical heat flux was investigated for a wide range of system pressure, and for various liquid subcoolings at atmospheric pressure. It was confirmed that the quasi-steady nucleate boiling exists with a certain life at the state corresponding to the point on the extension of the steady nucleate boiling curve for each system pressure. The life for a nucleate boiling heat flux for saturated He I becomes maximum at pressure of around 70 kPa where the steady critical heat flux also has a maximum value for the system pressure and it becomes large with the increase of liquid subcooling. Effect of heater diameter on the quasi-steady nucleate boiling and its life was also investigated. A correlation to express the life for the step heat input was given as a function of the quasi-steady nucleate boiling heat flux for a wide range of the system pressure.

Keywords

Helium Boiling Germanium Cond Cylin 

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Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • A. Sakurai
    • 1
  • M. Shiotsu
    • 1
    • 1
  • K. Hata
    • 1
  1. 1.Institute of Atomic EnergyKyoto UniversityUji, KyotoJapan

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