Cheng, S. C.,Tain, Ra-Min.2009-03-202009-03-2019901990Source: Masters Abstracts International, Volume: 30-03, page: 0870.9780315600737http://hdl.handle.net/10393/5965http://dx.doi.org/10.20381/ruor-14623A semi-empirical model to predict the Critical Heat Flux (CHF) in cross-flow boiling is presented in this work. This model, using an empirical correlation to calculate the vapor sheet thickness, is able to predict the CHF in subcooled or saturated region. The empirical correlation presented by Ungar and Eichhorn (1988) to calculate the vapor sheet thickness is modified by this work to include the quality effect. The RMS error for this semi-empirical correlation against the 271 experimental data obtained from various investigations is around 22%. A correction factor resulting from the investigation of the relationship for CHF's between cross-flow and axial-flow boiling is obtained from this work. During this investigation, an empirical correlation to predict the cross-flow CHF is also discovered. The correction factor method and the empirical correlation have wider ranges of mass flux effect than the semi-empirical correlation does. The RMS error for the correction factor method and the empirical correlation against the 177 experimental data are 16.2% and 13.4%, respectively. Because these prediction methods are in dimensionless forms, they can be applied to water as well as the non-aqueous fluids.205 p.Engineering, Mechanical.Thesis