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Experimental Investigation of the Spray Characteristics of Di-n-Butyl Ether (DNBE) as an Oxygenated Compound in Diesel Fuel
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 05, 2010 by SAE International in United States
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Increasing concern for the environment and the impending scarcity of fossil fuels requires continued development in hydrocarbon combustion science. For compression-ignition engines, adding oxygenated compounds to the fuel can reduce noise, soot formation, and unburned hydrocarbons while simultaneously increasing thermal efficiency.
In order to reliably model and design compression-ignition engines to use new fuel blends, accurate spray characteristic data is required. In this study, the spray characteristics of various blends of the oxygenated compound di-n-butyl ether (DNBE) with standard EN590 Diesel fuel are presented, including spray cone angle and spray penetration length for both liquid and gas phases. The experiments were conducted in a spray chamber at ambient conditions of 50 bar and 800 K, simulating TDC conditions in a Diesel engine. Injection pressures were varied from 700-1600 bar. Mie-scatter and shadowgraphy techniques were used to measure the liquid phase and gas phase spray characteristics, respectively. The lift-off length and ignition delay is investigated using OH-measurement technique. The spray structure of the DNBE alone and its blends with Diesel fuel have shown a larger spray angle and shorter penetration length than with the pure Diesel fuel, providing improvements to atomization behaviour, and thus expected increases in performance.
CitationBeeckmann, J., Aye, M., Gehmlich, R., and Peters, N., "Experimental Investigation of the Spray Characteristics of Di-n-Butyl Ether (DNBE) as an Oxygenated Compound in Diesel Fuel," SAE Technical Paper 2010-01-1502, 2010, https://doi.org/10.4271/2010-01-1502.
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