Optical tomography for concentration and velocity profiles in two component flows

Sallehuddin Ibrahim; Robert Garnett Green; Ken Dutton

doi:10.1117/12.397956

31 August 2000 Optical tomography for concentration and velocity profiles in two component flows

Sallehuddin Ibrahim, Robert Garnett Green, Ken Dutton

Proceedings Volume 4076, Optical Diagnostics for Industrial Applications; (2000) https://doi.org/10.1117/12.397956
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom

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.

Citation Download Citation

Sallehuddin Ibrahim, Robert Garnett Green, and Ken Dutton "Optical tomography for concentration and velocity profiles in two component flows", Proc. SPIE 4076, Optical Diagnostics for Industrial Applications, (31 August 2000); https://doi.org/10.1117/12.397956

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