A Parametric Investigation ot Critical Heat Flux In a Vertical Forced Convective Channel

Abstract

An experimental investigation of the parametric effects on CHF was conducted in a forced convective up-flow channel. Measurements were made using a 15.88 mm OD x 1.24 mm wall x 3568 mm long uniformly heated tubular test section, covering the pressure range of 1.72 to 6.9 MPa, the mass flux range of 340 to 2500 Kg/m2s and the inlet subcooling range of 10 to 160 degrees C. The limiting quality phenomenon of CHF was consistently observed over a wide range of test conditions. The test data were compared with Hewitt, Bowring and Biasi correlations. Discussions were made with reference to the sensitivities of these correlations in response to the variation of test conditions.