Share

CRITICAL HEAT FLUX OF FORCED CONVECTIVE BOILING IN UNIFORMLY HEATED VERTICAL TUBES WITH SPECIAL REFERENCE TO VERY LARGE LENGTH-TO-DIAMETER RATIOS.

Author(s) : KATTO Y., YOKOYA S.

Type of article: Article

Summary

OVER A WIDE RANGE OF LENGTH-TO-DIAMETER RATIOS L/D FROM 50 TO 800, THE CRITICAL HEAT FLUX (CHF) IN TUBES IS EXPLORED BY ANALYZING CHF DATA UP TO 1,051, RECENTLY OBTAINED IN EXPERIMENTS ON R12 AT 1.47 MEGAPASCALS. THE UNFITNESS OF THE EXPEDIENT METHOD SUBSTITUTING CHF DATA IN TUBES OF LOW L/D VALUES WITH NEGATIVE SUBCOOLING ENTHALPY DIFFERENCE FOR THOSE IN TUBES OF VERY HIGH L/D VALUES WITH POSITIVE ENTHALPY DIFFERENCE IS SHOWN AND THE CHF DATA WITH POSITIVE ENTHALPY DIFFERENCE ARE ANALYZED ON THE BASIS OF TWO TYPICAL KINDS OF EXISTING GENERALIZED CORRELATIONS. THE VALUE OF CHF FOR TUBES OF SMALL DIAMETER TENDS TO DEVIATE FROM PREDICTED VALUES. A TENTATIVE MEANS TO PREDICT THE ABOVE-MENTIONED DEVIATION PECULIAR TO LONG AND NARROW TUBES IS OBTAINED.

Details

  • Original title: CRITICAL HEAT FLUX OF FORCED CONVECTIVE BOILING IN UNIFORMLY HEATED VERTICAL TUBES WITH SPECIAL REFERENCE TO VERY LARGE LENGTH-TO-DIAMETER RATIOS.
  • Record ID : 1988-1782
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 30 - n. 11
  • Publication date: 1987

Links


See other articles in this issue (5)
See the source

Indexing