The proposed set of constants has been adapted to ethylene-air atmospheric flames, although the newly developed approach may be applied to any hydrocarbon-air diffusion flame.
Thus, the C−X band should have advantages with regard to CH detectability in atmospheric flames, and we show that good CH-PLIF signal-to-noise and signal-to-background ratios can be attained at a 10-kHz interrogation rate and that the spatial resolution (of the CH layer) is reasonably good as well.
We propose modifications to the fluorine mechanism to correct the discrepancies observed in the low pressure experiments, while simultaneously achieving good agreement with atmospheric pressure flame speed data in CH4/air/CHF3 flames, and, except in rich conditions (φ > 1.25) CH4/air/CH2flamesmes.
The species profiles relative to the flames containing the fluoromethanes are accurately predicted and atmospheric pressure flame speeds are fairly well predicted by the kinetic mechanism.
In this work, laser induced fluorescence (LIF) has been applied to probe PAHs in two atmospheric sooting flames: a premixed flat flame of methane and a Diesel turbulent spray one.
When these two halocarbons are added to an atmospheric H2 flame, similar LIF spectra of CF2 are also observed.
While homogeneous ignition chemistry controlled gaseous combustion at atmospheric pressure, flame propagation characteristics dictated the strength of homogeneous combustion at the highest investigated pressures.
Absolute concentrations of CH in a premixed, atmospheric flat flame of CH4 and air have been determined with cavity ring-down spectroscopy (CRDS).
It was successfully demonstrated that the use of a large tube under low-pressure conditions (between 2 and 60 kPa) can be a model for atmospheric pressure flame in narrow tubes.
The temperature of a premixed atmospheric methane/oxygen/argon flame measured by several thermocouples was found to be systematically higher than the theoretical temperature at small distances from the burner (in the region with a high temperature gradient).
Both positively and negatively charged particles were found, the positive charge dominating in the low pressure acetylene/oxygen flames, the negative charge dominating in the atmospheric ethylene/air flames.
