Subcooled Boiling Heat Transfer Under Forced Convection In A Heated Tube

Abstract

Single-and two-phase heat-transfer data were obtained by using distilled water flowing through an Inconel X resistance-heated tube.The nonboiling data were correlated with a Colburn-type equation that was modified to include the boiling phenomena by means of three significant parameters obtained by dimensional analysiS from basic considerations.Comparable heat-transfer data from reference sources, covering a broad range of conditions, were used in the development of the correlation.The reference data and the limited data obtained from the experimental program extended the generality of the correlation to cover a range of pressure from 16 to 2000 pounds per square inch, heat flux from 0.026 to 56.0 Btu :per square inch :per second, fluid velocity from 1.33 to 204 feet per second, and subcooling from 6 0 to 336 0 F. Liquid-ammonia data were included to demonstrate the applicability of the correlation to fluids other than water.Comparisons were made between wall temperatures at the incipience of boiling as predicted by an analytically derived equation and the experimental data.