TY - JOUR
T1 - Evolution of the soot particle size distribution along the centreline of an n-heptane/toluene co-flow diffusion flame
AU - Dreyer, Jochen A. H.
AU - Poli, Maximilian
AU - Eaves, Nick A.
AU - Botero, Maria L.
AU - Akroyd, Jethro
AU - Mosbach, Sebastian
AU - Kraft, Markus
PY - 2019
Y1 - 2019
N2 - A newly developed experimental set-up for studying liquid hydrocarbon combustion in the well-established Yale burner was used to investigate the correlation between fuel composition and its sooting propensity. Soot particle size distributions (PSDs) and flame temperatures along the centreline of an n-heptane/toluene co-flow diffusion flame are reported. The results are compared to soot temperature and volume fraction profiles obtained using colour ratio pyrometry. The addition of toluene (0, 5, 10, and 15 mol%) to heptane moved soot inception to lower heights above the burner (HAB). The earlier inception extended the soot growth zone in the toluene-laden flames, leading to larger soot primary and agglomerate particles. Toluene addition had little influence on the maximum soot number density, indicating that the observed increase in soot volume fraction can mainly be attributed to the increase in particle size. The reported PSDs inside a vapour-fed diffusion flame are the first of their kind and provide a comprehensive dataset for future studies of combustion chemistry and soot particle models.
AB - A newly developed experimental set-up for studying liquid hydrocarbon combustion in the well-established Yale burner was used to investigate the correlation between fuel composition and its sooting propensity. Soot particle size distributions (PSDs) and flame temperatures along the centreline of an n-heptane/toluene co-flow diffusion flame are reported. The results are compared to soot temperature and volume fraction profiles obtained using colour ratio pyrometry. The addition of toluene (0, 5, 10, and 15 mol%) to heptane moved soot inception to lower heights above the burner (HAB). The earlier inception extended the soot growth zone in the toluene-laden flames, leading to larger soot primary and agglomerate particles. Toluene addition had little influence on the maximum soot number density, indicating that the observed increase in soot volume fraction can mainly be attributed to the increase in particle size. The reported PSDs inside a vapour-fed diffusion flame are the first of their kind and provide a comprehensive dataset for future studies of combustion chemistry and soot particle models.
KW - Soot
KW - Laminar diffusion flame
KW - Liquid fuel Toluene/heptane
KW - Particle size distribution
KW - Colour-ratio pyrometry
U2 - 10.1016/j.combustflame.2019.08.002
DO - 10.1016/j.combustflame.2019.08.002
M3 - Journal article
SN - 0010-2180
VL - 209
SP - 256
EP - 266
JO - Combustion and Flame
JF - Combustion and Flame
ER -