Theoretical study of DI diesel engine performance and pollutant emissions using comparable air-side and fuel-side oxygen addition

Combustion phenomenon, performance and emissions of a diesel engine with aviation turbine JP-8 fuel and rapeseed biodiesel blends

“…10b). The lower smoke matches well with the test results Rakopoulos et al [55,57] and findings of other researchers [5,33]. As can be seen in Fig.…”

“…The 15.0% lower stoichiometric air-fuel ratio of RME compared with oxygen-free jet fuel also did not contribute to the formation of NO x at high temperatures. This rests on the fact that less atmospheric air-born oxygen participated in the NO creation from overall identical combustible mixtures, whereas the role of fuel oxygen seems as being not as much significant in NO and NO x production [33]. Therefore, the difference in NO x values between various fuel blends was not big as could be expected at a high speed.…”

“…10b). Studies with a single-cylinder, diesel engine revealed the liner correlation between exhaust emissions and intake-air oxygen fraction, whereas ''non-linearity'' occurred between production of soot and oxygen content in oxygenated fuels [33]. One should inject more to compensate for the lower heating value of RME to maintain brake power of an engine at the same level.…”

“…Whereas RME added to jet fuel not only improves the cetane number, but it also modifies the carbon-to-hydrogen ratio, provides fuel-bound oxygen, reduces net heating value, the content of polycyclic aromatics, and improves lubricity of the fuel. Despite a large number of studies conducted in optically-accessible [13,15,[30][31][32], single cylinder engines [23,28,29,33,34], a spherical vessel [35], laboratory furnaces, burners, and afterburners [36] there is a lack of works on a real multi-cylinder diesel engine powered with JP-8 fuel and rapeseed biodiesel blends. The purpose of the research was to study the effect of RME added to JP-8 fuel on the autoignition delay, combustion history, heat release characteristics, engine performance parameters, and exhaust emissions.…”

Diesel Engine Dynamics Modeling Considering Fuel Injection Period Based on Combustion Heat Release Rate Identification

“…Diesel engines are currently used in heavy load mobile and stationary power generation units because of their high torque output, size flexibility, durability and fuel efficiency (1) . In-cylinder combustion and heat release rates in diesel engines should be expressed mathematically for further application to engine development.…”