Structured illumination for 3-D Mie imaging and 2-D attenuation measurements in optically dense sprays

Elias Kristensson, Edouard Berrocal, Rikard Wellander, Mattias Ritcher, Marcus Alden, Mark Linne

Research output: Contribution to journalArticlepeer-review

16 Citations (SciVal)

Abstract

Qualitative description of spray structure and geometry in the near-field region of atomizing sprays is particularly challenging due to the lack of visibility through such optically dense media. Similarly, quantitative determination of the optical depth can be particularly underestimated as a result of detecting photons which have experienced a number of scattering events. In this paper we demonstrate, based on average imaging, the possibility to reconstruct the "true" 3-D Mie representation of an aerated spray, where image artifacts introduced by multiple scattering have been suppressed by means of Structured Laser Illumination Planar Imaging (SLIPI). Here, six images were used, instead of three usually employed in structured illumination, to reconstruct a single SLIPI image. Based on a similar approach, a 2-D estimation of optical depth has been performed and compared with the conventional single-point attenuation measurement. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
Original languageEnglish
Pages (from-to)855-861
JournalProceedings of the Combustion Institute
Volume33
DOIs
Publication statusPublished - 2011

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics

Keywords

  • Multiple scattering
  • Aerated sprays
  • Structured illumination
  • Light
  • extinction
  • Optical depth

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