Spatially Resolved Temperature Measurements Above a Burning Wood Pellet Using Diode Laser-Based Two-Line Atomic Fluorescence

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Abstract

Diode laser-based two-line atomic fluorescence (TLAF) thermometry applied to flames of combusting wood pellets is demonstrated. The temperature above burning wood pellets placed in the hot product gas of gallium seeded laminar flames is measured. The calibration-free technique provides spatially resolved temperatures in one dimension with sufficient temporal resolution to resolve all combustion stages of a pellet, even in highly sooting flames. The temperature above a burning pellet was found to decrease due to the release of volatile gases and the accuracy and precision of the technique is assessed at flame temperatures.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
  • Energy Engineering

Keywords

  • biomass combustion, diode lasers, thermometry, Two-line atomic fluorescence
Original languageEnglish
Pages (from-to)964-970
JournalApplied Spectroscopy
Volume72
Issue number6
Early online date2017 Dec 7
Publication statusPublished - 2018
Publication categoryResearch
Peer-reviewedYes

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