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CFD Study and Experimental Validation of a Dual Fuel Engine: Effect of Engine Speed

Author

Listed:
  • Roberta De Robbio

    (Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili (CNR), 80125 Napoli, Italy)

  • Maria Cristina Cameretti

    (Department of Industrial Engineering (D.I.I.), Università di Napoli Federico II, 80125 Napoli, Italy)

  • Ezio Mancaruso

    (Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili (CNR), 80125 Napoli, Italy)

  • Raffaele Tuccillo

    (Department of Industrial Engineering (D.I.I.), Università di Napoli Federico II, 80125 Napoli, Italy)

  • Bianca Maria Vaglieco

    (Istituto di Scienze e Tecnologie per l’Energia e la Mobilità Sostenibili (CNR), 80125 Napoli, Italy)

Abstract

Dual fuel engines induce benefits in terms of pollutant emissions of PM and NO x together with carbon dioxide reduction and being powered by natural gas (mainly methane) characterized by a low C/H ratio. Therefore, using natural gas (NG) in diesel engines can be a viable solution to reevaluate this type of engine and to prevent its disappearance from the automotive market, as it is a well-established technology in both energy and transportation fields. It is characterized by high performance and reliability. Nevertheless, further improvements are needed in terms of the optimization of combustion development, a more efficient oxidation, and a more efficient exploitation of gaseous fuel energy. To this aim, in this work, a CFD numerical methodology is described to simulate the processes that characterize combustion in a light-duty diesel engine in dual fuel mode by analyzing the effects of the changes in engine speed on the interaction between fluid-dynamics and chemistry as well as when the diesel/natural gas ratio changes at constant injected diesel amount. With the aid of experimental data obtained at the engine test bench on an optically accessible research engine, models of a 3D code, i.e., KIVA-3V, were validated. The ability to view images of OH distribution inside the cylinder allowed us to better model the complex combustion phenomenon of two fuels with very different burning characteristics. The numerical results also defined the importance of this free radical that characterizes the areas with the greatest combustion activity.

Suggested Citation

  • Roberta De Robbio & Maria Cristina Cameretti & Ezio Mancaruso & Raffaele Tuccillo & Bianca Maria Vaglieco, 2021. "CFD Study and Experimental Validation of a Dual Fuel Engine: Effect of Engine Speed," Energies, MDPI, vol. 14(14), pages 1-24, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4307-:d:596207
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    References listed on IDEAS

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    1. Lounici, Mohand Said & Loubar, Khaled & Tarabet, Lyes & Balistrou, Mourad & Niculescu, Dan-Catalin & Tazerout, Mohand, 2014. "Towards improvement of natural gas-diesel dual fuel mode: An experimental investigation on performance and exhaust emissions," Energy, Elsevier, vol. 64(C), pages 200-211.
    2. Liu, Jie & Yang, Fuyuan & Wang, Hewu & Ouyang, Minggao & Hao, Shougang, 2013. "Effects of pilot fuel quantity on the emissions characteristics of a CNG/diesel dual fuel engine with optimized pilot injection timing," Applied Energy, Elsevier, vol. 110(C), pages 201-206.
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    Cited by:

    1. Maria Cristina Cameretti & Roberta De Robbio & Ezio Mancaruso & Marco Palomba, 2022. "CFD Study of Dual Fuel Combustion in a Research Diesel Engine Fueled by Hydrogen," Energies, MDPI, vol. 15(15), pages 1-21, July.
    2. Maria Cristina Cameretti & Roberta De Robbio & Marco Palomba, 2023. "Numerical Analysis of Dual Fuel Combustion in a Medium Speed Marine Engine Supplied with Methane/Hydrogen Blends," Energies, MDPI, vol. 16(18), pages 1-22, September.
    3. Youcef Sehili & Khaled Loubar & Lyes Tarabet & Mahfoudh Cerdoun & Clément Lacroix, 2023. "Development of Predictive Model for Hydrogen-Natural Gas/Diesel Dual Fuel Engine," Energies, MDPI, vol. 16(19), pages 1-19, October.

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