Effect of Different Combustion Modes on the Performance of Hydrogen Internal Combustion Engines under Low Load

Wei Wei, Xu He, Hairong Zhu, Junfa Duan and Gaolin Qin
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Wei Wei: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Xu He: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Hairong Zhu: School of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Junfa Duan: School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Gaolin Qin: School of Mechanical Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

Sustainability, 2022, vol. 14, issue 10, 1-18

Abstract: Detailed hydrogen–air chemical reaction mechanisms were coupled with the three-dimensional grids of an experimental hydrogen internal combustion engine (HICE) to establish a computational fluid dynamics (CFD) combustion model based on the CONVERGE software. The effects of different combustion modes on the combustion and emission characteristics of HICE under low load were studied. The simulation results showed that, with the increase in excess hydrogen, the equivalent combustion and excessive hydrogen combustion modes with medium-cooled exhaust gas recirculation (EGR) dilution could improve the intensity of the in-cylinder combustion of HICE, increase the peak values of pressure and temperature in the cylinder, and then improve the indicated thermal efficiency of HICE under low load. However, larger excessive hydrogen combustion could weaken the improvement in performance; therefore, the performance of HICE could be comprehensively improved by the adoption of excessive hydrogen combustion with a fuel–air ratio below 1.2 under low load. The obtained conclusions indicate the research disadvantages in the power and emission performances of HICE under low load, and they are of great significance for the performance optimization of HICE. Furthermore, a control strategy was proposed to improve the stability of HICE under low load.

Keywords: hydrogen internal combustion engine; lean combustion; equivalent combustion; excessive hydrogen combustion; combustion characteristic; NO X emissions (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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