Non-linear analysis for a natural circulation boiling channel

The non-linear dynamics of a two-phase natural circulation boiling channel were investigated in this study, by employing the Galerkin nodal approximation method based on the homogeneous flow model. A stability map, which confirms the presence of an instability region under the condition of low exit...

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Bibliographic Details
Published in:Nuclear engineering and design 1994-11, Vol.152 (1), p.349-360
Main Authors: Lin, Y.N., Pan, Chin
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Installations for energy generation and conversion: thermal and electrical energy
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Summary:The non-linear dynamics of a two-phase natural circulation boiling channel were investigated in this study, by employing the Galerkin nodal approximation method based on the homogeneous flow model. A stability map, which confirms the presence of an instability region under the condition of low exit quality, was obtained. Theoretical results indicate that the oscillation frequency in this low quality region is significantly smaller than that for the density wave oscillation. The model was also utilized to study the transient behavior of the channel following a step change of power. Theoretical results further revealed that an oscillating channel can be stabilized by a change of power from the unstable region to the stable region.
ISSN:0029-5493
1872-759X
DOI:10.1016/0029-5493(94)90096-5