LAPSE:2021.0170
Published Article
LAPSE:2021.0170
A Numerical Investigation on De-NOx Technology and Abnormal Combustion Control for a Hydrogen Engine with EGR System
Hao Guo, Song Zhou, Jiaxuan Zou, Majed Shreka
April 16, 2021
The combustion emissions of the hydrogen-fueled engines are very clean, but the problems of abnormal combustion and high NOx emissions limit their applications. Nowadays hydrogen engines use exhaust gas recirculation (EGR) technology to control the intensity of premixed combustion and reduce the NOx emissions. This study aims at improving the abnormal combustion and decreasing the NOx emissions of the hydrogen engine by applying a three-dimensional (3D) computational fluid dynamics (CFD) model of a single-cylinder hydrogen-fueled engine equipped with an EGR system. The results indicated that peak in-cylinder pressure continuously increased with the increase of the ignition advance angle and was closer to the top dead center (TDC). In addition, the mixture was burned violently near the theoretical air−fuel ratio, and the combustion duration was shortened. Moreover, the NOx emissions, the average pressure, and the in-cylinder temperature decreased as the EGR ratio increased. Furthermore, increasing the EGR ratio led to an increase in the combustion duration and a decrease in the peak heat release rate. EGR system could delay the spontaneous combustion reaction of the end-gas and reduce the probability of knocking. The pressure rise rate was controlled and the in-cylinder hot spots were reduced by the EGR system, which could suppress the occurrence of the pre-ignition in the hydrogen engine.
Keywords
Computational Fluid Dynamics, exhaust gas recirculation, hydrogen engine, knocking, pre-ignition
Suggested Citation
Guo H, Zhou S, Zou J, Shreka M. A Numerical Investigation on De-NOx Technology and Abnormal Combustion Control for a Hydrogen Engine with EGR System. (2021). LAPSE:2021.0170
Author Affiliations
Guo H: College of Energy and Power Engineering, Harbin Engineering University, Harbin 150001, China [ORCID]
Zhou S: College of Energy and Power Engineering, Harbin Engineering University, Harbin 150001, China
Zou J: College of Energy and Power Engineering, Harbin Engineering University, Harbin 150001, China
Shreka M: College of Energy and Power Engineering, Harbin Engineering University, Harbin 150001, China [ORCID]
Journal Name
Processes
Volume
8
Issue
9
Article Number
E1178
Year
2020
Publication Date
2020-09-17
Published Version
ISSN
2227-9717
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Original Submission
Other Meta
PII: pr8091178, Publication Type: Journal Article
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LAPSE:2021.0170
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doi:10.3390/pr8091178
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Apr 16, 2021
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Apr 16, 2021
 
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Apr 16, 2021
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Calvin Tsay
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