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Heat Transfer Research
Facteur d'impact: 1.199 Facteur d'impact sur 5 ans: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v29.i6-8.250
pages 535-543

Liquid Film Thickness Measurement by the Fiber-Optical Probe

Aleksei R. Evseev
Kutateladze Institute of Thermophysics, 1 Lavrentiev Avenue, Novosibirsk, 630090, Russia

RÉSUMÉ

On the basis of fiber-optical probes (FOP) of the reflecting type a measurement technique of amplitude-frequency characteristics of liquid film thickness has been developed. The elaborated FOP probes have the spatial resolution less than 0.2−0.3 mm, time resolution − less than 10−3−10−4 s, and high measurement accuracy (1−2)%. The static, dynamical and angular FOP characteristics are delivered. The liquid nitrogen film thickness measurements have been conducted at an inaccessible location. The fiber communication line is 10 m length. The experimental data agree well with capacitance measurements which were performed simultaneously.


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