Modeling of critical filtration regimes of vapor-liquid flow

Critical flows are widely used in power engineering. Such flows are characterized by non-stationary processes, active vaporization due to a sharp drop in pressure when the mixture flows from a high-pressure medium to an atmospheric pressure medium, which especially necessitates the study of the para...

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Bibliographic Details
Published in:Journal of physics. Conference series 2020-11, Vol.1677 (1), p.12062
Main Authors: Khramtsov, D P, Nekrasov, D A, Vyazmin, A V, Pokusaev, B G
Format: Article
Language:English
Subjects:
Atmospheric models
Computational fluid dynamics
Cooling systems
Critical flow
Critical mass
Liquid flow
Mass flow rate
Mathematical models
Model testing
Numerical methods
Parameters
Physics
Pressure drop
Pressure reduction
Stationary processes
Two phase flow
Vaporization
Vapors
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Summary:Critical flows are widely used in power engineering. Such flows are characterized by non-stationary processes, active vaporization due to a sharp drop in pressure when the mixture flows from a high-pressure medium to an atmospheric pressure medium, which especially necessitates the study of the parameters of such flows in emergency situations, such as an emergency depressurization of a pipeline or cooling system. Due to the presence of two phases and the transiency of the processes, it is necessary to develop methods for numerical simulation of this process. The energy apparatus with a granular layer adds an additional level of complexity to the study of critical flows, namely, the effect of granular backfill on the characteristics of a two-phase flow. A new model for numerical simulation of the critical outflow of a vapor-liquid flow from a channel with a granular backfill has been created. The values of the mass flow rate of the mixture, the effect of vapor content on the critical flow rate, and the effect of geometric parameters of the granular backfill on the critical mass flow rate are obtained. The calculated data were compared with the experiment, and new data were obtained in a wider range of mass vapor content compared to experimental study.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1677/1/012062