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Proceedings Paper

Optical tomography for concentration and velocity profiles in two component flows
Author(s): Sallehuddin Ibrahim; Robert Garnett Green; Ken Dutton
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Paper Abstract

Optical tomography involves the use of non-invasive optical sensors to obtain information in order to produce images of the dynamic internal characteristics of process systems. This paper presents an investigation using optical tomography suitable for determining concentration and velocity profiles in two component flows in a fluid conveying pipe. The system is capable of detecting and measuring the amount of undissolved gas in waster, or gas in oil, where the mixture is flowing in a pipe. The system employs four projections consisting of a combination of two orthogonal and two rectilinear projections. The light transmitters consists of four halogen bulbs. Each orthogonal receiver projection employs 8 sensors and each rectilinear receiver projection uses 11 sensors making a total of 38 receiver sensors. The voltage profile from the sensors gives spatial information of the flow regime. Signal processing provides time-averaged signals which will generate peripheral concentration profiles. To observe the velocity profile via cross- correlation, a second identical measurement system has been constructed. One array of sensors is positioned upstream and the other downstream in the process measurement. Cross-correlograms provide mean velocities of velocity profiles over the measurement section.

Paper Details

Date Published: 31 August 2000
PDF: 7 pages
Proc. SPIE 4076, Optical Diagnostics for Industrial Applications, (31 August 2000); doi: 10.1117/12.397956
Show Author Affiliations
Sallehuddin Ibrahim, Univ. Teknologi Malaysia (United Kingdom)
Robert Garnett Green, Sheffield Hallam Univ. (United Kingdom)
Ken Dutton, Sheffield Hallam Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 4076:
Optical Diagnostics for Industrial Applications
Neil A. Halliwell, Editor(s)

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