A new correlation for the prediction of critical quality in tubes

Abstract

In this paper, dryout phenomenon of steam-liquid two-phase flow in vertical tube is studied. Based on Becker’s experimental data, 393 points of dryout data with pressure ranging from 2.9 to 20.1 MPa, mass flow rate ranging from 496 to 3120 kg/(m2 s), heat flux less than 1268 kW/m2 and pipe diameter ranging from 10 to 24.7 mm are re-fitted, and a new correlation for predicting the critical quality is proposed. The MAE of the new correlation is 7.2% when predicting the Becker's data. It also positively correlated with other databases of steam-liquid critical quality. However, the prediction accuracy of the new correlation is relatively low for refrigerant and deformation channel, which will be further revised in future work.