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Optical method for measurement of quality and flow patterns in helium two-phase flow

✍ Scribed by T Haruyama

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
353 KB
Volume
27
Category
Article
ISSN
0011-2275

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✦ Synopsis

Information about the quality and flow patterns of helium two-phase flow has been obtained by using optical fibres and photo-sensitive devices. Light emitted from a LED is scattered by bubbles and turbulence in liquid helium. As bubbles and turbulence in liquid are related to the quality, x, the measured photo-diode current may include much information concerning the two-phase flow. The change in the photo-diode current was ~0.18/~A when the quality changed from 0 to ~ 1 at a flow rate of r~ = 2.27 g cm-2 s-L The relationship between the observed flow patterns and measured signals are also included.

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