Optimization and evaluation of fluorescent tracers for flare removal in gas-phase particle image velocimetry

M. Chennaoui, D. Angarita-Jaimes, M. P. Ormsby, N. Angarita-Jaimes, E. McGhee, C. E. Towers, A. C. Jones, D. P. Towers, Anita Jones

Research output: Contribution to journalArticlepeer-review

Abstract

We report the development of optimized fluorescent dye-doped tracer particles for gas-phase particle image velocimetry (PIV) and their use to eliminate 'flare' from the images obtained. In such applications, micron-sized tracer particles are normally required to accurately follow the flow. However, as the tracer size is reduced the amount of light incident on the particle diminishes and consequently the intensity of emitted light (fluorescence). Hence, there is a requirement to identify dyes with high quantum yield that can be dissolved in conventional tracer media at high concentrations. We describe the selection and characterization of a highly fluorescent blue-emitting dye, Bis-MSB, using a novel method, employing stabilized micro-emulsions, to emulate the fluorescence properties of tracer particles. We present the results of PIV experiments, using 1 mu m tracer particles of o-xylene doped with Bis-MSB, in which elastically scattered 'flare' has been successfully removed from the images using an appropriate optical filter.

Original languageEnglish
Article number115403
Pages (from-to)-
Number of pages8
JournalMeasurement Science and Technology
Volume19
Issue number11
DOIs
Publication statusPublished - Nov 2008

Keywords

  • flare removal
  • particle image velocimetry
  • fluorescence
  • VELOCITY-FIELD MEASUREMENTS
  • IN-WATER EMULSIONS
  • PHOTOPHYSICAL PROPERTIES
  • SIZING TECHNIQUES
  • PIV MEASUREMENTS
  • 2-PHASE PIV
  • FLOW
  • OIL
  • SPRAYS
  • TURBOMACHINERY

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