Soot particle measurements in diffusion flames

Soot formation and growth in propane/air diffusion flames in a wide range of mole ratio of propane to air from 0.01 to 0.1 have been studied experimentally and theoretically. The concentration of acetylene, soot yield and particle size have been measured and the growth of soot particle has been simulated from surface growth and nucleation processes. The rate coefficient of surface growth has been correlated with the mole ratio of propane to air and the comparisons of particle size between measured and calculated results have been made.

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Soot Particle Size Distribution Measurements in Laminar Diffusion Flames of n-Heptane with Oxygenated Aromatic Fuel Additives by Time-Resolved Laser-Induced Incandescence

Energy & Fuels ◽

10.1021/acs.energyfuels.8b02012 ◽

2018 ◽

Vol 32 (11) ◽

pp. 11511-11518 ◽

Cited By ~ 3

Author(s):

Gaihua Xiong ◽

Michael Boot ◽

Lei Zhou ◽

Jos Reijnders ◽

Philip De Goey

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Soot Particle ◽

Diffusion Flames ◽

Fuel Additives ◽

Time Resolved ◽

Laminar Diffusion Flames ◽

Laminar Diffusion ◽

Laser Induced Incandescence

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Soot Particle Measurements in Steady and Unsteady Laminar Diffusion Flames Using Laser-Induced Incandescence

Heat Transfer: Volume 2 ◽

10.1115/ht2003-47239 ◽

2003 ◽

Author(s):

H. Sapmaz ◽

C. X. Lin ◽

M. A. Ebadian ◽

C. Ghenai

Keyword(s):

Soot Particle ◽

Volume Fraction ◽

Diffusion Flames ◽

Soot Volume Fraction ◽

Pulsation Period ◽

Laminar Diffusion Flames ◽

Fuel Flow ◽

Laser Induced Incandescence ◽

Sequential Images ◽

Good Agreement

Laser-Induced Incandescence (LII) is used in this study to measure the soot volume fraction for steady and unsteady laminar ethylene diffusion flames. For the steady flame the soot profiles obtained in this study using LII showed good agreement with those obtained previously using scattering/extinction technique. For the unsteady or flickering flames, we generated very repeatable time-varying diffusion flames by forcing the fuel flow at frequencies between 1–10 Hz. Phase lock images of the soot volume fractions were obtained for different phases between 0° and 360°. The sequential images showed the dynamics of the interactions between the generated vortices in the fuel and the flame. The phase-locked soot images revealed the entire motion process of the soot field during each pulsation period. The results obtained in the course of this study show that the soot emission decreased by lowering the oscillation frequency of the flame.

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