Effects of the atomization air on the topology of a Jet A-1 spray flame in a turbulent vitiated crossflow
- Conference Paper
The effects of the air-to-liquid ratio on a Jet A-1 spray in a vitiated turbulent crossflow are investigated by means of OH* chemiluminescence and OH-PLIF. The turbulent crossflow is generated with a 4 X 4 matrix of CH4-H2-Air lean technically premixed flames operated at 50 kW, equivalence ratio 0.7 and with a 5% H2 enrichment by mass. A Jet A-1 spray, generated with an air-assisted atomizer and corresponding to 5 kW power is introduced in the crossflow. The current work focuses on the effects of atomization air on the flame topology and heat release. The time-averaged high-speed OH* chemiluminescence images provide an estimate of the flame location and global features. For more insights, OH-PLIF experiments are performed at the central plane of the spray. In addition to the on-resonance OH PLIF signature, the detuning of the laser from the OH excitation wavelengths provides the spatial information about the presence of Jet A-1 droplets/vapour. It is reported that for low ALR the isolated combustion of relatively large droplets creates a localised heat release region on the windward side and closer to the atomizer. Whereas with increase in the ALR, the spray flame manifests higher degree of spatial uniformity. Show more
Pages / Article No.
Organisational unit09471 - Noiray, Nicolas / Noiray, Nicolas
NotesConference lecture held on April 15, 2021.
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