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Experiments in Fluids

Erschienen in:

01.02.2004 | Original

Scalar concentration measurements in liquid-phase flows with pulsed lasers

verfasst von: Jerry W. Shan, Daniel B. Lang, Paul E. Dimotakis

Erschienen in: Experiments in Fluids | Ausgabe 2/2004

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Abstract

The suitability of pulsed lasers for laser-induced-fluorescence (LIF) measurements of the local concentration of scalars in liquid-phase flows is investigated. Experiments were performed to measure the fluorescence intensity of aqueous solutions of rhodamine-6G chloride excited by a Q-switched, frequency-doubled, Nd:YAG laser. The fluorescence intensity is found to be linear with dye concentration, but not with illumination power density. The fluorescence intensity saturates at laser power densities easily exceeded by short-pulse-duration lasers. A procedure for calibrating and normalizing the raw image data is discussed which relies only on weak absorption and the linearity of fluorescence intensity with concentration. This procedure enables quantitative concentration measurement with pulsed-laser-induced fluorescence.

Vorheriger Artikel Simultaneous PLIF/PIV investigation of vortex-induced annular extinction in H2-air counterflow diffusion flames

Nächster Artikel An experimental investigation of a large-scale structure of a two-dimensional backward-facing step by using advanced multi-point LDV

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Titel: Scalar concentration measurements in liquid-phase flows with pulsed lasers
verfasst von: Jerry W. Shan
Daniel B. Lang
Paul E. Dimotakis
Publikationsdatum: 01.02.2004
Verlag: Springer-Verlag
Erschienen in: Experiments in Fluids / Ausgabe 2/2004
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-003-0717-7

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