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Particles Morphology of Mechanically Generated Oil Mist Mixtures of SAE 40 Grade Lubricating Oil with Diesel Oil in the Context of Explosion Risk in the Crankcase of a Marine Engine

Author

Listed:
  • Leszek Chybowski

    (Department of Machine Construction and Materials, Faculty of Marine Engineering, Maritime University of Szczecin, ul. Willowa 2, 71-650 Szczecin, Poland)

  • Marcin Szczepanek

    (Department of Power Engineering, Faculty of Marine Engineering, Maritime University of Szczecin, ul. Willowa 2, 71-650 Szczecin, Poland)

  • Katarzyna Gawdzińska

    (Department of Machine Construction and Materials, Faculty of Marine Engineering, Maritime University of Szczecin, ul. Willowa 2, 71-650 Szczecin, Poland)

  • Oleh Klyus

    (Department of Marine Power Plants, Faculty of Marine Engineering, Maritime University of Szczecin, ul. Willowa 2, 71-650 Szczecin, Poland)

Abstract

This article presents research results on mechanically generated oil mists. The research was carried out for oil mixtures for the Agip/Eni Cladium 120 SAE 40 API CF oil for industrial and marine engines diluted with diesel oil Orlen Efecta Diesel Bio at diesel oil concentrations of 2%, 5%, 10%, 20%, and 50% m/m. Pure lubricating oil and pure diesel oil were also tested. Droplet size distributions were determined for the reference moment at which residual discrepancies R between the measurement data and the sprayed pure diesel oil calculation model obtained the lowest value. For mechanically generated oil mists, the light transmission coefficient through the oil mist T , the specific surface area of the oil mist SSA , and the volumetric share of drops D V ( V %) for 10%, 50%, and 90% of the total volume of the generated oil mist were determined. The span of the volumetric distributions of droplet sizes SPAN , Sauter mean diameter D [3,2] , De Brouckere mean diameter D [4,3] , the volumetric and mass percentage of droplets with diameters ≤5 μm (diameters necessary for a crankcase explosion), the minimum difference between the measurement results, and the calculation model used by the residual error measuring device were determined. The best fit in each measurement cycle (the smallest R value was analyzed. For specific indicators, correlations with diesel oil levels in the mixture were determined using the Pearson r XY linear correlation coefficient. Those results confirmed an increase in smaller-diameter droplets, an increase in the number of droplets with diameters up to 5 μm, and an increase in the span of the oil mist droplet diameter distribution with additional diesel oil. This confirmed a relationship between an increased lubricating oil dilution and an increased explosion risk in the crankcase.

Suggested Citation

  • Leszek Chybowski & Marcin Szczepanek & Katarzyna Gawdzińska & Oleh Klyus, 2023. "Particles Morphology of Mechanically Generated Oil Mist Mixtures of SAE 40 Grade Lubricating Oil with Diesel Oil in the Context of Explosion Risk in the Crankcase of a Marine Engine," Energies, MDPI, vol. 16(9), pages 1-27, May.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:9:p:3915-:d:1140250
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    References listed on IDEAS

    as
    1. Leszek Chybowski, 2023. "Study of the Relationship between the Level of Lubricating Oil Contamination with Distillation Fuel and the Risk of Explosion in the Crankcase of a Marine Trunk Type Engine," Energies, MDPI, vol. 16(2), pages 1-38, January.
    2. Damian Kazienko & Leszek Chybowski, 2020. "Instantaneous Rotational Speed Algorithm for Locating Malfunctions in Marine Diesel Engines," Energies, MDPI, vol. 13(6), pages 1-31, March.
    3. Vincent Berthome & David Chalet & Jean-François Hetet, 2022. "Consequence of Blowby Flow and Idling Time on Oil Consumption and Particulate Emissions in Gasoline Engine," Energies, MDPI, vol. 15(22), pages 1-17, November.
    4. Leszek Chybowski, 2022. "The Initial Boiling Point of Lubricating Oil as an Indicator for the Assessment of the Possible Contamination of Lubricating Oil with Diesel Oil," Energies, MDPI, vol. 15(21), pages 1-14, October.
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