Frequency Spectrum of Boiling-up Coolant Flowrate Pulsations in a System of Parallel Channels

摘要

The frequency spectrum of stationary solutions in a system of weakly nonidentical channels is qualitatively investigated as applied to a PWR reactor in the course of studying hydrodynamic instability caused by flashing of coolant under the conditions of natural circulation. Conditions for realizing two types of solutions (single-frequency and multifrequency ones) are formulated, and it is shown that with the approx imation in which absence of heat transfer between the channels is assumed, the boundaries of the resulting spectrum do not go beyond the confines of partial frequencies available in the system.