TY - JOUR
T1 - An experimental investigation into ignition and combustion of groups of slurry fuel droplets containing high concentrations of water
AU - Valiullin, T. R.
AU - Vershinina, K. Yu
AU - Kuznetsov, G. V.
AU - Strizhak, P. A.
PY - 2020/12/15
Y1 - 2020/12/15
N2 - In this study, the main ignition and combustion characteristics have been compared for droplet groups of a coal-water slurry containing petrochemicals (CWSP), as well as oil, surrounded by water droplets. Thus, in a combustion chamber, we simulated the ignition and combustion conditions of a heterogeneous fuel aerosol that can be formed when jets of different liquids cross or when multi-component flows delaminate. It was shown that a decrease in the distance between droplets (from 10 mm to 2 mm, i.e. to the typical fuel droplet size) reduces the gas-phase and heterogeneous ignition delay times of oil and CWSP by 30% on average. The evaporation times of water droplets decrease by approximately 25%, if the distance between them increases in the combustion chamber. It was established that the ignition delay times of oil and coal-water slurry containing petrochemicals increased by 20–40% and 40–70%, respectively, when a combustible liquid droplet was in the center with six water droplets around it. The experimental results are a database for the development of efficient technologies of injecting multi-component fuel into combustion chambers.
AB - In this study, the main ignition and combustion characteristics have been compared for droplet groups of a coal-water slurry containing petrochemicals (CWSP), as well as oil, surrounded by water droplets. Thus, in a combustion chamber, we simulated the ignition and combustion conditions of a heterogeneous fuel aerosol that can be formed when jets of different liquids cross or when multi-component flows delaminate. It was shown that a decrease in the distance between droplets (from 10 mm to 2 mm, i.e. to the typical fuel droplet size) reduces the gas-phase and heterogeneous ignition delay times of oil and CWSP by 30% on average. The evaporation times of water droplets decrease by approximately 25%, if the distance between them increases in the combustion chamber. It was established that the ignition delay times of oil and coal-water slurry containing petrochemicals increased by 20–40% and 40–70%, respectively, when a combustible liquid droplet was in the center with six water droplets around it. The experimental results are a database for the development of efficient technologies of injecting multi-component fuel into combustion chambers.
KW - Coal-water slurry containing petrochemicals
KW - Combustion
KW - Droplet
KW - Droplet arrangement scheme
KW - Oil
KW - Water
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U2 - 10.1016/j.fuproc.2020.106553
DO - 10.1016/j.fuproc.2020.106553
M3 - Article
AN - SCOPUS:85089427726
VL - 210
JO - Fuel Processing Technology
JF - Fuel Processing Technology
SN - 0378-3820
M1 - 106553
ER -