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Multiphase Science and Technology

Publicou 4 edições por ano

ISSN Imprimir: 0276-1459

ISSN On-line: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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PHASE DETECTION AIDED THERMOMETRY AND ITS APPLICATION TO NATURAL CONVECTIVE SUBCOOLED FLOW BOILING IN A NARROW GAP

Volume 31, Edição 1, 2019, pp. 17-25
DOI: 10.1615/MultScienTechn.2018029446
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RESUMO

Since temperature and void (or phase) fraction are important parameters to characterize multi-phase flow behaviors, various methods to measure these quantities have been developed. However, these multi-phase flow parameters have not been simultaneously measured at the same time and position until the present because individual sensors, such as an optical fiber void sensor, a conductance probe, and a sheath thermocouple (TC) are needed. This article summarizes the development of the Phase Detection aided Thermometry (PDaT) to detect the phase for two-phase flow and simultaneously measure the liquid/gas temperature with a miniature TC with high temporal-spatial resolutions. To demonstrate the applicability of PDaT, it was applied to the natural convective subcooled flow boiling in a narrow gap (1 mm) between a cylindrical heater rod and a transparent flat plate. This is a very simple model of a part of the subchannel of fuel rod bundle in a light water reactor core. It was confirmed that the PDaT is able to measure the temperature and void fraction simultaneously and is a useful tool for two-phase flow characterization.

Referências
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