Development of a reduced primary reference fuel – oxymethylene dimethyl ether (PRF-OMEₓ) mechanism for diesel engine applications

Oxymethylene dimethyl ethers (OMEₓ), having a chemical formula of CH₃O-(CH₂O)ₓ-CH₃ where x varies from 1 to 5, have been widely considered as a promising fuel to partially replace diesel in CI engines in terms of reducing soot emissions. This work is focused on developing a reduced primary reference fuel (PRF)-OMEₓ chemical mechanism to better describe the combustion and emission characteristics of gasoline/diesel blends with OMEₓ. The novelty of this work lies in the fact that the OMEₓ part of the mechanism is represented not only by OME₃ as done in most studies found in literature, but also with other OME chain lengths that is, OME₂₋₄ which are considered to be optimum and better represent the commercial OMEₓ blends. For this purpose, a detailed OMEₓ mechanism is reduced by applying different reduction techniques considering a wide range of operating conditions including pressure, temperatures, equivalence ratios and fuel compositions. The result is merged with an already validated PRF mechanism to form a reduced PRF-OMEₓ mechanism consisting of 213 species and 840 reactions. The newly formed mechanism is validated against a wide set of experimental data including ignition delay times, laminar flame speeds and species concentration profiles. Furthermore, a rigorous set of numerical simulations for various diesel-OMEₓ blends in a compression ignition engine are carried out at two different operating points to validate the developed mechanism. Simulation results highlight that the developed mechanism not only replicates the experimental behavior in terms of in-cylinder pressure and heat release rate but exhibits a better combustion phasing closer to experimental data when compared with other mechanisms where only OME₃ is utilized to represent OMEₓ. Overall, the developed PRF-OMEₓ mechanism proves to be realistic and suitable for application in engine combustion simulations involving gasoline/diesel and OMEₓ blends.

• Record URL:
  • https://doi.org/10.1177/14680874241255755
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14680874
• Supplemental Notes:
  • © IMechE 2024.
• Authors:
  • García-Oliver, José M
  • 0000-0002-2676-9681
  • Novella, Ricardo
  • 0000-0002-5123-6924
  • Micó, Carlos
  • 0000-0001-5787-6212
  • Bin-Khalid, Usama
  • 0000-0002-4009-9688
• Publication Date: 2024-10

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 1898-1913
• Serial:
  • International Journal of Engine Research
  • Volume: 25
  • Issue Number: 10
  • Publisher: Sage Publications, Incorporated
  • ISSN: 1468-0874
  • EISSN: 20413149

Subject/Index Terms

• TRT Terms: Alternate fuels; Compression ignition engines; Diesel fuels; Ethers; Exhaust gases; Fuel mixtures
• Subject Areas: Energy; Environment; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01936149
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 7 2024 11:52AM