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Optics Letters

Optics Letters


  • Vol. 24, Iss. 22 — Nov. 15, 1999
  • pp: 1632–1634

Soot-velocity measurements by particle vaporization velocimetry

J. M. Seitzman, R. T. Wainner, and P. Yang  »View Author Affiliations

Optics Letters, Vol. 24, Issue 22, pp. 1632-1634 (1999)

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We demonstrate a new imaging technique for velocity measurements in particle-laden flows. The technique, particle vaporization velocimetry, is a form of flow tagging based on laser vaporization of absorbing particles at defined locations in the flow. The locations of these tagged regions are then interrogated after a known delay to determine the convective velocity. Results are presented for vaporization of carbonaceous (soot) particles in a nonreacting gas jet and a hydrocarbon flame, with interrogation provided by either elastic scattering or laser-induced incandescence from the soot. The long lifetime of the tagged soot regions (>2 ms) allows measurements to be made over a wide range of velocities.

© 1999 Optical Society of America

OCIS Codes
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.2470) Remote sensing and sensors : Flames
(280.2490) Remote sensing and sensors : Flow diagnostics
(290.5850) Scattering : Scattering, particles

J. M. Seitzman, R. T. Wainner, and P. Yang, "Soot-velocity measurements by particle vaporization velocimetry," Opt. Lett. 24, 1632-1634 (1999)

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