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Boiling heat transfer characteristics for heat inputs with various increasing rates in liquid nitrogen.

Author(s) : SAKURAI A., SHIOTSU M., HATA K.

Type of article: Article

Summary

The transition processes from non-boiling (single-phase) to film boiling or nucleate boiling on a horizontal cylinder of 1.2 mm in diameter in liquid nitrogen caused by exponential, rampwise, and stepwise heat inputs with various increasing rates, were made clear at pressures ranging from 20.7 to 582.4 kilopascals for the saturated liquid, and at pressures of 1016 and 2047 kilopascals for the subcooled liquid (the temperature of which is 77.4 K). The direct transition from non-boiling (natural convection) to film boiling was observed even for exponential heat input with the long period of around 100 s at atmosphere pressure. The transient heat transfer processes after the vapour film collapse were also measured at pressures ranging from 101 to 392 kilopascals.

Details

  • Original title: Boiling heat transfer characteristics for heat inputs with various increasing rates in liquid nitrogen.
  • Record ID : 1994-0858
  • Languages: English
  • Source: Cryogenics - vol. 32 - n. 5
  • Publication date: 1992

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