This study focuses on the relative importance of O2 and OH as oxidizers of soot during the late cycle in diesel engines, where the soot oxidation is characterized in an optically accessible engine using laser extinction measurements. These are combined with in cylinder gas sampling data from a single cylinder engine fitted with a fast gas sampling valve. Both measurements confirm that the in-cylinder soot oxidation slows down when the inlet concentration of O2 is reduced. A 38% decrease in intake O2 concentration reduces the soot oxidation rate by 83%, a non-linearity suggesting that O2 in itself is not the main soot oxidizing species. Chemical kinetics simulations of OH concentrations in the oxidation zone and estimates of the OH soot oxidation rates point towards OH being the dominant oxidizer.
|Publication status||Published - 2017|
Related research output
Gallo, Y., 2016 Nov 8
, First ed.
Lund: Lund University Faculty of Engineering Department of Energy Sciences Division of Combustion Engines P.O. Box 118, SE-221 00 LUND Sweden
. 189 p.
Research output: Thesis › Doctoral Thesis (compilation)
, Shen, M., Axel Eriksson
, Waldheim, B., Gallo, Y., Johan Martinsson
, Patrik Nilsson
, Öivind Andersson
, Johansson, B. & Joakim Pagels
, p. 1-1
Research output: Contribution to conference › Abstract
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