Numerical Analysis of Supercritical Flow Instability in Parallel Dual Channel

Numerical analysis has been carried out for the supercritical flow instability in parallel dual channel by the time-domain approach.The mass.momentum and energy conservation equations are discre-tized using an implicit finite difference scheme.A computer code called SCIA is developed to calculate the flow characteristics in the parallel dual channel.Curves of pressure drop versus flow rate are obtained.Para-metric studies are carried out for the supercritical water in the parallel dual channel.Results show that for supercritical conditions,the static instability can hardly occur,and the parametric effects on flow instability are similar to those in two-phase flows.