Optically efficient fluorescent tracers for multi-constituent PIV

Optically efficient fluorescent tracers for multi-constituent PIV This paper was motivated by the need for improved instrumentation to study mixing processes in multi-constituent and multi-phase fluid systems. The development of a single colour camera PIV system that can image micron size spectrally distinct fluorescent droplets in a multi-constituent gas phase flow is reported. Concentrations of fluorescent dyes in solution have been optimised to achieve sufficient fluorescence visibility. The adopted philosophy is to exploit the inherent co-registration offered by a 3-chip colour CCD camera with the images recorded in the three colour planes enabling flow constituent/phase to be determined as well as pulse order. The results show that the spectral discrimination process is robust and in a well mixed gas-phase flow the average error between the flow velocities in the two constituents is <4%. The use of UV excitation (on suitably excitable dyes) has the added benefit of spectrally separating the excitation wavelength from the imaging bandwidth to allow ‘flare removal’. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Optically efficient fluorescent tracers for multi-constituent PIV

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Publisher
Springer-Verlag
Copyright
Copyright © 2008 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-008-0558-5
Publisher site
See Article on Publisher Site

Abstract

This paper was motivated by the need for improved instrumentation to study mixing processes in multi-constituent and multi-phase fluid systems. The development of a single colour camera PIV system that can image micron size spectrally distinct fluorescent droplets in a multi-constituent gas phase flow is reported. Concentrations of fluorescent dyes in solution have been optimised to achieve sufficient fluorescence visibility. The adopted philosophy is to exploit the inherent co-registration offered by a 3-chip colour CCD camera with the images recorded in the three colour planes enabling flow constituent/phase to be determined as well as pulse order. The results show that the spectral discrimination process is robust and in a well mixed gas-phase flow the average error between the flow velocities in the two constituents is <4%. The use of UV excitation (on suitably excitable dyes) has the added benefit of spectrally separating the excitation wavelength from the imaging bandwidth to allow ‘flare removal’.

Journal

Experiments in FluidsSpringer Journals

Published: Sep 10, 2008

References

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