Yf. Rao et al., Numerical simulation of two-phase boiling flows and prediction of DNB under PWR conditions with a multidimensional two-fluid model, JSME I J B, 43(4), 2000, pp. 608-613
Citations number
19
Categorie Soggetti
Mechanical Engineering
Journal title
JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING
The present paper reports numerical modeling of multi-dimensional two-phase
boiling flows with a multi-dimensional two-fluid model and prediction of t
he Departure from Nucleate Boiling (DNB) under PWR accidental conditions. T
he conventional two-fluid model is adopted and various constitutive equatio
ns are incorporated to develop a computer code capable of predicting multi-
dimensional void fraction distribution in a flow-boiling channel. The numer
ical results are compared with the data in literature of the measured profi
le of void fraction, with the agreement being satisfactory. To predict the
occurrence of DNB, the Weisman-Pei model is adopted, which predicts the occ
urrence of DNB when the local void fraction exceeds a predetermined value i
n the near-wall bubble layer. The predicted DNB power is compared with the
results from an experiment of DNB power in an annular channel under PWR flo
w and pressure conditions, and the agreement is encouraging.