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ISSN Online: 2377-424X

International Heat Transfer Conference 5
September, 3-7, 1974, Tokyo, Japan

A LAGRANGIAN ANALYSIS OF TWO-PHASE HYDRODYNAMIC AND NUCLEAR-COUPLED DENSITY-WAVE OSCILLATIONS

Get access (open in a dialog) DOI: 10.1615/IHTC5.530
pages 225-229

Resumo

The mathematical technique known as the "method of characteristics" has been used to construct an exact, analytical solution to predict the onset of density-wave oscillations in diabatic two-phase systems, such as Boiling Water Nuclear Reactors (BWR's). Specifically, heater wall dynamics, boiling boundary dynamics and nuclear kinetics have been accounted for in this analysis. Emphasis is placed on giving the reader a clear physical understanding of the phenomena of two-phase density-wave oscillations. Explanations are presented in terms of block diagram logic, and phasor representations of the various pressure drop perturbations are given.