Control-oriented multi-phase combustion model for biodiesel fueled engines

Junfeng Zhao and Junmin Wang

Applied Energy, 2013, vol. 108, issue C, 92-99

Abstract: In this paper, the combustion characteristics of Diesel and biodiesel fuels are investigated and compared. Based on the experimental data obtained from a medium-duty Diesel engine, a multi-phase combustion model, which is applicable to both Diesel and biodiesel fuels, is developed and it shows satisfactory accuracy within the test range in this study. A preliminary ignition-delay correlation is established by considering not only the in-cylinder physical factors such as pressure and temperature, but also the fuel property variations. It is also capable of modeling the premixed and mixing-controlled combustion by using two cascaded Wiebe functions. Through a grey-box parameter identification approach, a set of Wiebe coefficients, which are partially physics-based, are found; then the model can have a reasonable accuracy for the range of experiments conducted. Based on the multi-phase model, prediction can be made for the CA50 (crank angle for 50% heat release), which is very important for combustion timing feedback control.

Keywords: Biodiesel; Control-oriented; Ignition-delay; Combustion model; Diesel engines (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (5)

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DOI: 10.1016/j.apenergy.2013.03.001

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