Comparison of In-Cylinder Soot Evolution in an Optically Accessible Engine Fueled with JP-8 and ULSD

Spray combustion of Jet-A and diesel fuels in a constant volume combustion chamber

“…Under similar temperature level, high NL indicates more soot in the Jet-A flame, which is different from the trend in Ref. [26]. The difference could be resulted from the different ambient conditions and different fuel quantities.…”

“…The results in Ref. [26] are under low load conditions. However, the lower soot level of Jet-A can be also found in Ref.…”

“…Their results showed that JP-8 led to a better combustion efficiency, improved fuel economy, and reduced NO x but with a higher soot emission compared with diesel fuel. In-cylinder soot evolution under low load conditions was studied in an optical engine with JP-8 and ultra-low sulfur diesel (ULSD) by Yu et al [26]. JP-8 produced less engine-out soot emission compared to ULSD, meanwhile, less soot optical thickness (KL factor) was also found for JP-8 during the whole cycle with lower soot temperature.…”

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

“…10b shows how did the exhaust opacity change with increasing volume of RME in jet and diesel fuels when operating at a full (100%) load and speeds of 1400 and 2200 rpm. As could be expected [15,30], the exhaust smoke (soot) decreased by as much as 31.0% due to replacement of diesel fuel (B5) with JP-8 fuel at the low speed of 1400 rpm. However, the exhaust opacity increased to maximum values of 60.2% (J5), 63.3% (J10), and 75.5% (J20) those were 28.4%, 35.0%, and 61.0% higher than the combustion of jet fuel produces (46.9%) at a full engine load.…”

“…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.…”