Density Wave Instability in Once-Through Boiling Flow System, (II)

Abstract

The density wave instability in a once-through boiling flow system is analyzed using a simplified model characterized by lumped parameters and moving boundaries.An analytical solution of the stability boundary is derived in generalized form, which is then verified by comparison with experimental data obtained in a joule-heated system.Further comparison with published data obtained from experiments with sodium-heated steam generator indicates that the proposed model can be validly used for preliminary estimation of the stability boundary.Several dimensionless parameters governing the stability are also derived from the proposed model.