Simulation of Dual Fuel Combustion of Direct Injection Engine with Variable Natural Gas Premixed Ratio
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 32، شماره: 9
سال انتشار: 1398
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 450
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شناسه ملی سند علمی:
JR_IJE-32-9_014
تاریخ نمایه سازی: 10 آذر 1398
چکیده مقاله:
Nowadays, the major challenge of diesel engines development is simultaneous nitrogen oxides and soot emissions reduction without the thermal efficiency drop. Hence, different combustion concepts should be investigated to reach optimum emission and performance conditions in diesel engines without expensive aftertreatment systems. This paper presents the results of a study on a dual fuel (DF) engine including natural gas and diesel fuel in view of combustion and emissions parameters. The current investigation also supports by 3D-CFD simulation coupled with the chemical kinetics mechanism for detailed investigation. Based on the results, increasing the premixed ratio of natural gas from 50% to 90% causes the combustion shifts toward the expansion stroke. Therefore, the in-cylinder pressure and combustion efficiency decreases. In 90% premixed ratio of natural gas, the non-combustion condition can be observed. This phenomena leads to extremely increase in HC and CO emissions.
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نویسندگان
Bahram Jafari
Faculty of Engineering Modern Technologies, Amol University of Special Modern Technologies (AUSMT), Amol, Iran
Hassan Khatamnejad
Mechanical Engineering Department, Urmia University, Urmia, Iran
Mohammad Hassan Shahavi
Faculty of Engineering Modern Technologies, Amol University of Special Modern Technologies (AUSMT), Amol, Iran
Davood Domeyri Ganji
Department of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran