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Optical Diagnostic Combustion Comparisons of Pump Diesel with Bio-Derived Diesel Blends in an Optical DI Diesel Engine
Technical Paper
2012-01-0868
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Combustion studies were completed using an International VT275-based, optical DI Diesel engine fueled with Diesel fuel, a Canola-derived FAMES biodiesel, as well as with a blend of the Canola-derived biodiesel and a cetane-reducing, oxygenated fuel, Di-Butyl Succinate. Three engine operating conditions were tested to examine the combustion of the fuels across a range of loads and combustion schemes. Pressure data and instantaneous images were recorded using a high-speed visible imaging, infrared imaging, and high-speed OH imaging techniques. The recorded images were post processed to analyze different metrics, such as projected areas of in-cylinder soot, OH, and combustion volumes. A substantially reduced in-cylinder area of soot formation is observed for the Canola-DBS blended fuel with a slight reduction from the pure FAMES biodiesel compared to pump Diesel fuel. This work presents that the reduction in soot for the blended fuel is caused by a twofold effect of the additional oxygen in the fuel as well as reduction in the autoignition of the fuel allowing for increased air entrainment into the fuel plumes.
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Squibb, C., Schock, H., Allen, C., Lee, T. et al., "Optical Diagnostic Combustion Comparisons of Pump Diesel with Bio-Derived Diesel Blends in an Optical DI Diesel Engine," SAE Technical Paper 2012-01-0868, 2012, https://doi.org/10.4271/2012-01-0868.Also In
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