High-speed planar thermometry and velocimetry using thermographic phosphor particles

Christopher Abram, Benoit Fond, Andrew L. Heyes, Frank Beyrau

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Simultaneous gas-phase temperature and velocity imaging using micrometer-size thermographic phosphor particles seeded into the flow is demonstrated at a 3 kHz repetition rate. The velocity field is measured using a standard particle image velocimetry approach, while the temperature is determined from the temperature sensitive  phosphorescence emission of the particles following excitation at 355 nm. Since the particles are very small, they rapidly assume the temperature and velocity of the surrounding gas. A single shot temperature precision of better than 5 % was achieved at 500 K. Time-resolved measurements in the wake of a heated cylinder are presented, demonstrating the utility of these imaging diagnostics to observe transient, coupled heat and mass transfer phenomena.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalApplied Physics B: Lasers and Optics
Issue number2
Publication statusPublished - 29 May 2013
Externally publishedYes


  • velocity imaging
  • thermographic phosphor thermometry
  • imaging diagnostics

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