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Numerical simulations were performed to assess the relationship between carbon monoxide (CO) and formaldehyde and unburned methanol-unregulated emissions in cylinders and a tailpipe with ozone (O3) addition from a direct-injection spark-ignition methanol engine. This simulation study was performed during cold-start and steady-state modes with O3 addition of 3000 and 7000 ppm. The initial phase of...
Numerical simulations were performed for the effect of injection and ignition timings on combustion and the generation of formaldehyde and unburned methanol emissions in the cylinder of a stratified charge direct injection spark ignition (DISI) methanol engine during cold start using AVL-fire, coupling the methanol chemical and kinetic reaction mechanisms. A non-uniform spray-line distribution nozzle...
A non-uniform spray-line distribution nozzle was used to form a stratified charge distribution of methanol-air mixture in-cylinder. Computational fluid dynamics were employed to simulate the methanol chemical kinetics reaction mechanism. The effects of an overall methanol-air equivalence ratio on the mixture distribution of the in-cylinder, cylinder pressure, heat release rate, cylinder temperature,...
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