Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 122, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/s00340-016-6329-8
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Funding
- Swedish Energy Agency
- Knut & Alice Wallenberg Foundation
- European Research Council
- Swedish Research Council (VR)
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The use of diode lasers for spatially resolved temperature imaging is demonstrated in low-pressure pre-mixed methane-air flames using two-line atomic fluorescence of seeded indium atoms. This work features the advantages of using compact diode lasers as the excitation sources with the benefits of two-dimensional planar imaging, which is normally only performed with high-power pulsed lasers. A versatile and reliable seeding technique with minimal impact on flame properties is used to introduce indium atoms into the combustion environment for a wide range of flame equivalence ratios. A spatial resolution of around 210 mu m for this calibration-free thermometry technique is achieved for three equivalence ratios at a pressure of 50 mbar in a laminar flat flame.
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