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Communication Dans Un Congrès Année : 2023

Experimental study of the effect of droplets on opposed stretched premixed flames

Résumé

The effect of fuel droplets on the burning velocity of strained laminar premixed flames was investigated experimentally using optical diagnostics. The twin counterflow burner configuration was used to create premixed acetone vapour flames with the addition of fuel droplets. Particle image velocimetry (PIV) was used to measure 2D velocities for nominal equivalence ratios in the range (0.8-1.21) as a function of strain rate (250-550 s 1). Measurements of reference flame speeds upstream of the flames were made for both reference methane/air flames and acetone vapour/droplet flames, and compared to simulated values of the purely gaseous flames. Spontaneous Raman spectroscopy was used to measure temperature and major species molar fractions across reference methane flames. The results were shown to be in good agreement with the simulations for most of the species, except CO and CO 2 , which had too low a signal-to-noise ratio in the product zone. Preliminary measurements of acetone spray/vapour flames showed the capability of the setup to measure Raman signals in the presence of droplets at lowered laser energy. High laser energies led to prompt ignition of the droplets. Potential means of resolving the problem are suggested.
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Dates et versions

hal-04295047 , version 1 (20-11-2023)
hal-04295047 , version 2 (03-09-2024)

Identifiants

  • HAL Id : hal-04295047 , version 1

Citer

M Kuvshinov, B Lecordier, S Idlahcen, A Cessou, B Renou, et al.. Experimental study of the effect of droplets on opposed stretched premixed flames. 11th European Combustion Meeting, Apr 2023, ROUEN, France. ⟨hal-04295047v1⟩
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