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Experimental study of onset of subcooled annular flow boiling
, Article Progress in Nuclear Energy ; Volume 51, Issue 2 , 2009 , Pages 361-365 ; 01491970 (ISSN) ; Nouri Borujerdi, A ; Jafari, J ; Tabatabaei, I ; Sharif University of Technology
2009
Abstract
An experimental study on the onset of nucleate boiling (ONB) is performed for water annular flow to provide a systematic database for low pressure and velocity conditions. A parametric study has been conducted to investigate the effect of pressure, inlet subcooling, heat and mass flux on flow boiling. The test section includes a Pyrex tube with 21 mm inner diameter and a stainless steel (SS-304) rod with outer diameter of 6 mm. Pressure, heat and mass flux are in the range of 1.73 < P < 3.82 bar, 40 < q < 450 kW/m2 and 70 < G < 620 kg/m2 s, respectively. The results illustrate that inception heat flux is extremely dependent on pressure, inlet subcooling temperature and mass flux; for example...