A more realistic skeletal mechanism with compact size for n-butanol combustion in diesel engines
| Autor: | Wei Tang, Yuqiang Li, Gang Liu, Bingqian Lou, Shitu Abubakar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science 020209 energy Mechanical Engineering Aerospace Engineering Polycyclic aromatic hydrocarbon 02 engineering and technology Diesel engine Combustion Mechanism (engineering) Diesel fuel chemistry.chemical_compound 020401 chemical engineering Chemical engineering chemistry n-Butanol 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 235:3082-3100 |
| ISSN: | 2041-2991 0954-4070 |
| Popis: | To accurately predict the combustion and emissions characteristics of a diesel engine fueled with n-butanol/diesel blends, a more realistic compact-sized skeletal mechanism with (149 species and 497 reactions) was developed in this study based on the decoupling method. It was generated by integrating the simplified fuel-related sub-mechanisms of n-butanol and diesel surrogates including n-dodecane, iso-cetane, iso-octane, toluene, and decalin. The same detailed core sub-mechanisms of C2-C3 and H2/CO/C1, in which the formation and oxidation of benzene (A1) and larger polycyclic aromatic hydrocarbon (PAH) up to coronene (A7) of alkanes, aromatics, cycloalkanes and alcohols were used. The PAH formation behavior of individual fuel components in the mechanism were analyzed in detail based on the methods of pathway analysis, rate of production and sensitivity analysis. The mechanism was extensively validated against ignition delay time, laminar flame speed, species profile and three-dimensional engine simulation. The results show that the effects of fuel types on the PAH formation are satisfactorily captured, and the combustion characteristics of n-butanol/diesel blends and each component are reliably reproduced by the current mechanism. |
| Databáze: | OpenAIRE |
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