FORCED CONVECTION BOILING STUDIES. FINAL REPORT ON FORCED CONVECTION VAPORIZATION PROJECT
Local heat transfer coefficients and pressure gradients were measured for bulk boiling of water in forced flow in round tubes with internal diameter ranging from 0.1162 to 0.4317 in. and lengths of 15 to 40 in., heat fluxes of 6 x 10/sup 4/ to 1.45 x 10/sup 6/ BTU/hr ft/sup 2/, mass fluxes of 49 to 911 lb/sec ft/sup 2/ exit qualities of 5 to 57% and at pressures ranging from 42 to 505 psia. The pressure gradients are correlated within 30% in terms of modified Lockhard- Martinelli parameter, while the Nusselt number is correlated within 40% by a combination of the Lockhard-Martinelli X/sub tt/ and a parameter called the boiling number, Bo = (q/A)/(Gh/sub fg/). Apparently X/sub tt/ expresses the effect of forced convection while the boiling number relates to the nucleate boiling contribution. A study of the influences of nucleate boiling of a subcooled liquid on the pressure gradient in forced flow was also conducted. (auth)
- Research Organization:
- California. Univ., Berkeley. Inst. of Engineering Research
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-16-013211
- OSTI ID:
- 4803071
- Report Number(s):
- TID-14632
- Country of Publication:
- United States
- Language:
- English
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