Simultaneous optical diagnostic velocity and scalar field by molecular tagging technique Stratified Flames View project

International audienc

Mixture fraction gradient effects on heat release in partially premixed combustion

The effect of the mixture fraction gradient on a turbulent premixed/non-premixed, rod stabilized, isooctane/air, V-flame was studied. Two-dimensional line spectrometry was performed along a wide spectral range (UV to near IR) to identify radiating species and to characterize each branch of the partially premixed flame (PPF). Chemiluminescence imaging of OH* and CH* was used to estimate time averaged heat release rates. Results are presented and discussed and limitations of these line of sight diagnostics techniques are considered for the current flame configuration. Preliminary OH PLIF images are shown and the design of a proposed experiment for heat release Planar Laser Induced Fluorescence (PLIF) is described.NRC publication: Ye

OH/CH2O/3-Pentanone PLIF applied to a stratified isooctane/air turbulent flame front

This paper describes an experimental investigation on partially premixed combustion through the use of a unique burner that enables variation of mixture fraction longitudinally along a flame, replicating conditions that are relevant to practical stratified combustion devices. A PLIF imaging setup that images OH, CH2O, and 3-Pentanone has been implemented to correlate unburned mixture fraction, progress variable, and flame surface density in a stratified isooctane/air flame. Heat release measurements are also obtained from the pixel-by-pixel product of simultaneous OH and CH2O images.NRC publication: Ye

The effect of mixture fraction gradients in partially premixed combustion

Peer reviewed: YesNRC publication: Ye

The Influence of Hydrogen Enrichment on the Turbulent Flame Speed of Lean Methane/Air V-Flames

International audienc

Simultaneous optical diagnostic velocity and scalar field by molecular tagging technique Stratified Flames View project

International audienc