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The Modeling of Fuel Auto-Ignition Delay and Its Verification Using Diesel Engines Fueled with Oils with Standard or Increased Cetane Numbers

Author

Listed:
  • Jerzy Cisek

    (Mechanical Department, Cracow University of Technology, 31-864 Cracow, Poland)

  • Szymon Leśniak

    (Mechanical Department, Cracow University of Technology, 31-864 Cracow, Poland)

Abstract

This article contains the results of mathematical modeling of the self-ignition delay ( τ c sum ) of a single droplet for various fuels, and the results of measurement verification ( τ c ) of this modeling in diesel engines. The result of modeling the τ c sum (as a function of the diameter and ambient temperature of the fuel droplet) revealed two physical and two chemical stages that had different values of the weighting factor ( WF i ) in relation to the total delay of self-ignition. It was also found that the WF i values of individual phases of the self-ignition delay differed for different fuels (conventional and alternative), and in the total value of τ c sum . The measured value of the self-ignition delay ( τ c ) was determined in tests using two diesel engines (older—up to EURO II and newer generation—from EURO IV). The percentage difference in the Δτ c sum value obtained from modeling two fuels with different cetane number values was compared with the percentage difference in the Δτ c value for the same fuels obtained during the engine measurements. Based on this analysis, it was found that the applied calculation model of the self-ignition delay for a single fuel droplet can be used for a comparative analysis of the suitability of different fuels in the real conditions of the cylinder of a diesel engine. This publication relates to the field of mechanical engineering.

Suggested Citation

  • Jerzy Cisek & Szymon Leśniak, 2023. "The Modeling of Fuel Auto-Ignition Delay and Its Verification Using Diesel Engines Fueled with Oils with Standard or Increased Cetane Numbers," Energies, MDPI, vol. 16(14), pages 1-22, July.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:14:p:5273-:d:1190468
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    References listed on IDEAS

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    1. Jerzy Cisek & Szymon Leśniak & Andrzej Borowski & Włodzimierz Przybylski & Vitaliy Mokretskyy, 2022. "Visualisation and Thermovision of Fuel Combustion Affecting Heat Release to Reduce NO x and PM Diesel Engine Emissions," Energies, MDPI, vol. 15(13), pages 1-32, July.
    2. Jerzy Cisek & Szymon Lesniak & Winicjusz Stanik & Włodzimierz Przybylski, 2021. "The Synergy of Two Biofuel Additives on Combustion Process to Simultaneously Reduce NOx and PM Emissions," Energies, MDPI, vol. 14(10), pages 1-31, May.
    3. Mat Yasin, M.H. & Yusaf, Talal & Mamat, R. & Fitri Yusop, A., 2014. "Characterization of a diesel engine operating with a small proportion of methanol as a fuel additive in biodiesel blend," Applied Energy, Elsevier, vol. 114(C), pages 865-873.
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