Soot measurement in diluted methane diffusion flames by multi-pass extinction and laser-induced incandescence
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Abstract
Multi-pass cavity line-of-sight extinction (MPC-LOSE) and laser-induced incandescence (LII) techniques are deployed to measure the soot volume fraction in a series of nitrogen-diluted flames, which produce only ppm volume mass fractions of soot. The separate suppression effects on soot formation of direct fuel dilution and indirect effects of temperature and residence time are interpreted by using a numerically calculated flow velocity and temperature field using a one-step fast chemistry model. The experimentally determined rate of soot formation is shown to obey approximately the same function of the local temperature for all dilution cases. The results show that a simple one-step reaction model using previously measured activation energies can account for the dilution effect with good accuracy. The results show that the direct effect of dilution on concentration is comparable to the effects of changing the temperature estimated local temperature and residence time.Citation
Tian, B., Gao, Y., Zhang, C. and Hochgreb, S., (2018). 'Soot measurement in diluted methane diffusion flames by multi-pass extinction and laser-induced incandescence'. Combustion and Flame, 192, pp. 224-237.Publisher
Elsevier BVJournal
Combustion and FlameDOI
10.1016/j.combustflame.2018.01.037Additional Links
https://www.sciencedirect.com/science/article/pii/S0010218018300415https://www.repository.cam.ac.uk/handle/1810/274117
Type
ArticleLanguage
enISSN
0010-2180ae974a485f413a2113503eed53cd6c53
10.1016/j.combustflame.2018.01.037