A novel streak velocimetry technique based on 2D fits of decaying phosphor particle images

Authors

  • Luming Fan Otto-von-Guericke Universität, Germany; National Research Council Canada; University of Ottawa, Canada
  • Patrizio Vena National Research Council Canada
  • Bruno Savard University of Ottawa, Canada; Polytechnique Montréal, Canada
  • Guangtao Xuan Otto-von-Guericke Universität, Germany
  • Benoît Fond Otto-von-Guericke Universität, Germany

DOI:

https://doi.org/10.18409/ispiv.v1i1.175

Keywords:

Particle streak velocimetry, PIV, phosphor, least square fitting, boundary layer

Abstract

A new 2D velocimetry technique based on streaks formed by individual phosphor particles, which are moving during their luminescence decay following pulsed excitation is proposed in this study. Tin-doped phosphor particles (Sr,Mg)3(PO4)2:Sn2+ are dispersed into flows and excited by a pulsed UV light sheet. During the phosphor decay time (~27 µs), the emission streaks due to particle motion are recorded. A 2D fitting is then applied on each particle streak against the analytical expression of intensity distribution, to obtain the velocity information for each particle. Unlike Particle Tracking Velocimetry (PTV) this technique does not rely on any particle image searching procedure.

Author Biography

  • Luming Fan, Otto-von-Guericke Universität, Germany; National Research Council Canada; University of Ottawa, Canada

    Dr. Luming Fan is working as a postdoc at National Research Council Canada on developing new laser diagnostics for combustion and flow studies. Prior to that, he obtained his PhD degree from the University of Cambridge in 2019.

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Published

2021-08-01

Issue

Vol. 1 No. 1 (2021)

Section

Algorithms and Techniques

License

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