Spatiotemporal flame propagations, combustion and solid particle emissions from lean and stoichiometric gasoline direct injection engine operation

Jeon, Joonho

doi:10.1016/j.energy.2020.118652

Spatiotemporal flame propagations, combustion and solid particle emissions from lean and stoichiometric gasoline direct injection engine operation

Journal Article · Thu Aug 20 00:00:00 EDT 2020 · Energy

DOI:https://doi.org/10.1016/j.energy.2020.118652· OSTI ID:1848498

Jeon, Joonho ^[1]

Pukyong National Univ., Busan (Korea, Republic of). Dept. of Fire Protection Engineering; Pukyong National Univ., Busan (Korea, Republic of). Division of Architectural and Fire Protection Engineering; Pukyong National Univ., Busan (Korea, Republic of)

Increased particle number and mass emissions in gasoline direct injection (GDI) engines should require to investigate in-cylinder flame and combustion characteristics associated with primary source of particle emissions. In this article, in-cylinder spatiotemporal flame luminosity is quantitatively characterized to features combustion process and solid particle emissions from a GDI engine operating in two lean and one stoichiometric modes. Low- and high-steady state operating points were used to compare combustion strategies on flame development and emission characteristics. A fiber-optic sensor composed of eight measurement channels detected the flame front and the direction of the flame propagation in the combustion chamber. Solid particle emissions in the exhaust were measured using an engine exhaust particle sizer and a micro soot sensor. Results of the experiments showed that two lean combustion modes by injection strategies resulted in distinct combustion and flame development. Lean combustion modes generated high diffusion flame by burning stratified rich-mixture. Although the lean cases resulted in strong diffusion flames, the lean-homogeneous produced similar particle size distributions with the stoichiometric mode with high ash particles. Piston pool fires on the piston surface in the lean-stratified mode induced a large accumulation mode with high particle mass concentrations.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Organization:: Pukyong National University; USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0007217

OSTI ID:: 1848498

Alternate ID(s):: OSTI ID: 1656669

Journal Information:: Energy, Journal Name: Energy Journal Issue: C Vol. 210; ISSN 0360-5442

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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