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    A numerical study of the effects of oxy-fuel combustion under homogeneous charge compression ignition regime

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    Authors
    Mobasheri, Raouf
    Aitouche, Abdel
    Peng, Zhijun
    Li, Xiang
    Affiliation
    Centre de Recherche en Informatique Signal et Automatique de Lille
    Junia
    University of Bedfordshire
    Issue Date
    2021-02-16
    Subjects
    diluent strategies
    HCCI combustion
    Oxy-fuel
    diesel engine
    pollutant emissions
    
    Metadata
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    Abstract
    The European Union (EU) has recently adopted new directives to reduce the level of pollutant emissions from non-road mobile machinery engines. The main scope of project RIVER for which this study is relating is to develop possible solutions to achieve nitrogen-free combustion and zero-carbon emissions in diesel engines. RIVER aims to apply oxy-fuel combustion with Carbon Capture and Storage (CCS) technology to eliminate NOx emissions and to capture and store carbon emissions. As part of this project, a computational fluid dynamic (CFD) analysis has been performed to investigate the effects of oxy-fuel combustion on combustion characteristics and engine operating conditions in a diesel engine under Homogenous Charge Compression Ignition (HCCI) mode. A reduced chemical n-heptane-n-butanol-PAH mechanism which consists of 76 species and 349 reactions has been applied for oxy-fuel HCCI combustion modeling. Different diluent strategies based on the volume fraction of oxygen and a diluent gas has been considered over a wide range of air-fuel equivalence ratios. Variation in the diluent ratio has been achieved by adding different percentages of carbon dioxide for a range from 77 to 83 vol.% in the intake charge. Results show that indicated thermal efficiency (ITE) has reduced from 32.7% to 20.9% as the CO2 concentration has increased from 77% to 83% at low engine loads while it doesn’t bring any remarkable change at high engine loads. It has also found that this technology has brought CO and PM emissions to a very ultra-low level (near zero) while NOx emissions have been completely eliminated.
    Citation
    Mobasheri R, Aitouche A, Peng Z, Li X (2021) 'A numerical study of the effects of oxy-fuel combustion under homogeneous charge compression ignition regime', International Journal of Engine Research, (), pp.-.
    Publisher
    SAGE Publications Ltd
    Journal
    International Journal of Engine Research
    URI
    http://hdl.handle.net/10547/624893
    DOI
    10.1177/1468087421993359
    Additional Links
    https://journals.sagepub.com/doi/10.1177/1468087421993359
    Type
    Article
    Language
    en
    ISSN
    1468-0874
    ae974a485f413a2113503eed53cd6c53
    10.1177/1468087421993359
    Scopus Count
    Collections
    Computing

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