Toward developing simplified models for diesel/biodiesel engine pollutant emissions

摘要: Biodiesel is considered as an attractive alternative to petrodiesel for transportation applications. Substituting with domestically produced biodiesel increases energy independence, reduces the carbon footprint, and offers a viable path toward biomass utilisation. It has been found that biodiesel-fuelled engines emit up 70% lower particulate matter (PM) compared petrodiesel-fuelled engines, although they can 20% more nitric oxides (NO x ). However, differences in physical chemical properties of require re-optimization diesel engine control systems, e.g. injection timing exhaust gas regeneration, when substituted biodiesel. Although there much focus this area, still need fundamental research aid development closed-loop systems. In study, detailed kinetic simulations are employed improve understanding combustion under pressure temperature conditions engines. The carried out objective developing simplified mechanisms which then be models develop effective strategies. computations using strained laminar flamelet code. addition exploring effect strain rate (turbulence) on ignition, extinction, pollutant formation characteristics, pathways lead PM NO studied by considering evolution precursor species. general, ignition extinction flames sensitive turbulence than flames. Soot volume fraction combustion. This consistent measurements reported concentration is, however, kinetics alone, suggesting phasing operating parameters influence observed results emissions where often higher shown while increasing mixing soot both fuels, reduction significantly greater increased