Simulation of the combustion process for a CI hydrogen engine in an argon-oxygen atmosphere |
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Authors: | Nik Muhammad Hafiz Mohd Radzi Abu Mansor Wan Mohd Faizal Wan Mahmood |
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Affiliation: | 1. Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia;2. Centre of Excellence for Technology and Engineering (CREaTE), Jabatan Kerja Raya Malaysia, 78000 Alor Gajah, Melaka, Malaysia |
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Abstract: | Hydrogen combustion in a noble gas atmosphere increases the combustion chamber temperature, and the high specific heat ratio of the gas increases the thermal efficiency. In this study, nitrogen was replaced by argon as the intake air along with pure oxygen to supply the engine. The objectives of this study are to determine the effects of different engine parameters on combustion and to analyse the emissions from hydrogen combustion in an argon-oxygen atmosphere. This research was conducted through simulations using CONVERGE 2.2.0 software, and the YANMAR engine NF19SK model was used to determine the basic parameters. Changing the injector location affects the pressure and temperature in the combustion chamber. With increasing compression ratio, the pressure increases more rapidly than the temperature. However, combustion at high compression ratios decreases the maximum heat release rate and increases the combustion duration. Hydrogen combustion at ambient temperatures below 1200 K follows the Arrhenius equation. |
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Keywords: | Hydrogen combustion Argon-oxygen atmosphere CFD Direct injection Compression ratio |
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