Journal
FUEL
Volume 185, Issue -, Pages 500-507Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2016.08.010
Keywords
Image enhancement; Infrared emission; Ignition process; Flame colour; Soot radiation
Categories
Funding
- EPSRC [EP/K036750/1, EP/G063044/1]
- Engineering and Physical Sciences Research Council [EP/K036750/1, EP/G063044/1] Funding Source: researchfish
- EPSRC [EP/G063044/1, EP/K036750/1] Funding Source: UKRI
Ask authors/readers for more resources
From the image processing of high speed colour images of flame ignition, areas of dominant infrared emission have been noticed, which has stimulated the more in depth investigation in this paper. Two test cases for propane and methane with co-flow air were carried out. By applying selective digital image enhancement technique, the weak chemiluminescence-induced visible flame and infrared signals are simultaneously resolved together with the much stronger visible soot radiation. It is found that the pockets of soot only emitting infrared signal exists in both propane and methane ignition process cases. In the ignition process, the chemiluminescence-induced blue flame is observed first, which is followed by soot only having infrared emission. The visible orange coloured sooty flame only appears afterwards. The soot only emitting infrared is found in between the blue flame and the visible sooty flame. The co-flow air is found to accelerate the ignition process and it also brings forward soot formation. The investigation demonstrates that a proper image enhancement technique is essential in the further understanding of combustion process taking place when using a high speed camera. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available