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Applied Physics B

, Volume 87, Issue 2, pp 363–372 | Cite as

Determining aerosol particle size distributions using time-resolved laser-induced incandescence

  • K.J. DaunEmail author
  • B.J. Stagg
  • F. Liu
  • G.J. Smallwood
  • D.R. Snelling
Article

Abstract

The particle size distribution within an aerosol containing refractory nanoparticles can be inferred using time-resolved laser-induced incandescence (TR-LII). In this procedure, a small volume of aerosol is heated to incandescent temperatures by a short laser pulse, and the incandescence of the aerosol particles is then measured as they return to the ambient gas temperature by conduction heat transfer. Although the cooling rate of an individual particle depends on its volume-to-area ratio, recovering the particle size distribution from the observed temporal decay of the LII signal is complicated by the fact that the LII signal is due to the incandescence of all particle size classes within the sample volume, and because of this, the particle size distribution is related to the time-resolved LII signal through a mathematically ill-posed equation.

This paper reviews techniques proposed in the literature for recovering particle size distributions from TR-LII data. The characteristics of this problem are then discussed in detail, with a focus on the effect of ill-posedness on the stability and uniqueness of the recovered particle size distributions. Finally, the performance of each method is evaluated and compared based on the results of a perturbation analysis.

Keywords

Particle Size Distribution Soot Volume Fraction Soot Aggregate Model Parameter Uncertainty Incandescence Signal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • K.J. Daun
    • 1
    Email author
  • B.J. Stagg
    • 2
  • F. Liu
    • 1
  • G.J. Smallwood
    • 1
  • D.R. Snelling
    • 1
  1. 1.National Research Council of CanadaOttawaCanada
  2. 2.Columbian Chemicals CompanyMariettaUSA

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