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Natural-convection film-boiling heat transfer: experiments of subcooled film boiling with long vapour film.

Author(s) : OHTAKE H., NISHIO S.

Type of article: Article

Summary

The test liquid was R113 at amospheric pressure. For cylinders of both types, local heat-transfer coefficients of saturated and subcooled film boiling were much higher than the respective predictions from the two-phase boundary layer theory. In the case of vertical cylinders, the local heat-transfer coefficient did not depend on the distance from the leading edge even if the liquid was subcooled. In the case of horizontal cylinders of large diameter, the local value did not strongly depend on the distance from the stagnation point for saturated film boiling, but it depended on the distance and reached a maximum at a distance from the stagnation point with increasing liquid subcooling. As for the averaged heat-transfer coefficient of horizontal cylinders of large diameter, it increased with increasing liquid subcooling but did not depend on the diameter even under subcooled conditions.

Details

  • Original title: Natural-convection film-boiling heat transfer: experiments of subcooled film boiling with long vapour film.
  • Record ID : 1995-0813
  • Languages: English
  • Source: JSME int. J., B - vol. 37 - n. 1
  • Publication date: 1994/02
  • Document available for consultation in the library of the IIR headquarters only.

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