An unsteady model for fluidelastic instability in an array of flexible tubes in two-phase cross-flow

•A fluidelastic instability model for two-phase flow was developed.•The model can reveal the effect of the velocity difference between two phases.•The model has been verified with the experimental data from literature.•The stability data has been collapsed based on the new model. The streamtube mode...

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Bibliographic Details
Published in:Nuclear engineering and design 2015-04, Vol.285, p.58-64
Main Authors: Jiang, Nai-bin, Chen, Bin, Zang, Feng-gang, Zhang, Yi-xiong
Format: Article
Language:English
Subjects:
Arrays
Instability
Mathematical models
Nuclear engineering
Slip
Stability
Tubes
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Summary:•A fluidelastic instability model for two-phase flow was developed.•The model can reveal the effect of the velocity difference between two phases.•The model has been verified with the experimental data from literature.•The stability data has been collapsed based on the new model. The streamtube model for fluidelastic instability in single-phase flow was extended to two-phase flow by two kinds of two-phase flow model. One was the traditional HEM, and the other was the slip ratio model. The model based on slip ratio can represent the effect of velocity difference between gas and liquid phases, and was verified with the experimental data from the literature. Comparing to the conventional HEM model, the slip ratio model and the introduction of interfacial velocity could collapse the stability data from various studies, which is beneficial for predicting the fluidelastic instability of tube bundles from existing stability maps and methods.
ISSN:0029-5493
1872-759X
DOI:10.1016/j.nucengdes.2014.12.032