Testing of a Spherical Dual-Tipped Optical Fiber Probe for Local Measurements of Void Fraction and Gas Velocity in 2-Phase Flows
Document Type
Article
Publication Date
6-1990
Publication Title
Canadian Journal of Chemical Engineering
Volume
68
Issue
3
First page number:
504
Last page number:
510
Abstract
An alternate and easy method of constructing an optical fiber probe tip is presented for the study of different two-phase flow variables such as local time-averaged void fraction, gas velocity and interfacial bubble passage frequency. The proposed probe tip has similar response characteristics to the “U-bend” single fiber probe and is easier to construct than the 90° wedge tipped probe. The signal from the spherical tip seems to be insensitive to changes in bubble velocity as opposed to the 90° wedge and is more advantageous at higher velocities. The signal from the spherical tip has the same time duration as the signal changes from liquid to gas and vice versa for the same bubble velocity. A simplified model is presented to describe the balance of forces around the spherical tip when a bubble is penetrated. The model offers a qualitative explanation of why the non-dimensional response intensity decreases as the bubble velocity increases.
Keywords
Optical fiber probe; Optical fibers; Probes (Electronic instruments) – Design and construction; Spherical-tipped probe; Two-phase flow – Measurement; Two-phase measurements
Disciplines
Engineering | Mechanical Engineering
Language
English
Permissions
Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.
Repository Citation
Moujaes, S.
(1990).
Testing of a Spherical Dual-Tipped Optical Fiber Probe for Local Measurements of Void Fraction and Gas Velocity in 2-Phase Flows.
Canadian Journal of Chemical Engineering, 68(3),
504-510.