Influence of Coupling Action of Oxygenated Fuel and Gas Circuit Oxygen on Soot Generation in a Diesel Engine
Publication: Journal of Energy Engineering
Volume 144, Issue 5
Abstract
This paper focuses on a four-cylinder light-duty diesel engine and analyzes how the coupling action of oxygenated fuel and gas circuit oxygen impact soot generation based on tests where the in-cylinder ambient oxygen concentration is rich, medium, or poor. The test results show that ignition delay period and fuel oxygen content are major factors in soot value decreases, whereas in-cylinder combustion temperature hardly affects soot generation. Further analysis reveals that the weight of influence of ignition delay period and fuel oxygen content on soot generated by combustion of B0 (pure diesel) and B20 (20% n-butyl alcohol + 80% diesel by mass) fuels are different at various in-cylinder oxygen concentrations. For an oxygen content of 0.87% in the fuel, when there is rich oxygen inside the cylinders, the weight of influence on soot generation is 72.73–80.00%; when there is a medium amount of oxygen, the weight of influence is 42.18–72.73%; in the case of scarce oxygen, the weight of influence is 41.43–42.18%. In terms of ignition delay period, when there is rich oxygen, the weight of influence is 20.00–27.27%; in the case of a medium amount of oxygen, the weight of influence is 27.27–57.82%; and for only a little oxygen, the weight of influence is 57.82–58.57%.
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Acknowledgments
This study was financially supported by Award Program of the Award Program of the National Natural Science Foundation of China (51776177), Chunhui Project of the Education Ministry (Z2014059), Youth Program of Sichuan Education Department (13ZB0022), an open project of the Key Laboratory for Testing Fluids and Power Machinery of the Education Ministry of China (SZJJ2016-006).
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Published In
Journal of Energy Engineering
Volume 144 • Issue 5 • October 2018
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©2018 American Society of Civil Engineers.
History
Received: Nov 22, 2017
Accepted: Mar 20, 2018
Published online: Jun 28, 2018
Published in print: Oct 1, 2018
Discussion open until: Nov 28, 2018
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