Abstract

In this paper, the behavior of two-phase flow instability of a twin-channel system is studied experimentally. The two-phase flow instability between twin channels (FIBT) was observed in the experiments at three different system pressures, different inlet resistance coefficients and nonuniform heating condition. The instability boundaries of the twin-channel system are obtained in the phase plane of the subcooling and phase change number. The influences of inlet resistance, system pressure and nonuniform heating are obtained. In the end the numerical simulation results based on RELAP5/MOD3.4 code are also discussed.

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