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Evaluation of a new computational fluid dynamics model for internal combustion engines using hydrogen under motoring conditions

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  • Rakopoulos, C.D.
  • Kosmadakis, G.M.
  • Pariotis, E.G.

Abstract

The present work conducts a preliminary evaluation of a new CFD (computational fluid dynamics) model, which is under development at the authors' laboratory. Using this model, it is feasible to understand how the intake manifold and in-cylinder geometry affect the in-cylinder flow field and the mixing processes taking place in an Otto (spark-ignition) engine. The model is applied on a high-swirl, two-valve, four-stroke, transparent combustion chamber engine running under motoring conditions. To investigate the fuel–air mixing process, hydrogen is injected in the intake manifold. To evaluate the model three case studies are examined. First, the model is applied to simulate the external mixing in the intake manifold with a tee-mixer injection system. Secondly, the transient gas flow field in the intake manifold and engine cylinder is examined over the complete engine cycle. Finally, the transient mixing process in the intake manifold and the spatial and temporal distribution of species concentrations inside the cylinder are numerically computed using the developed model. To validate the model, the results obtained through the test cases examined are compared either with available experimental data or with simulated results, which are obtained using a commercially available CFD code applied under the same conditions.

Suggested Citation

  • Rakopoulos, C.D. & Kosmadakis, G.M. & Pariotis, E.G., 2009. "Evaluation of a new computational fluid dynamics model for internal combustion engines using hydrogen under motoring conditions," Energy, Elsevier, vol. 34(12), pages 2158-2166.
    • Handle: RePEc:eee:energy:v:34:y:2009:i:12:p:2158-2166
    DOI: 10.1016/j.energy.2008.09.022
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    References listed on IDEAS

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    1. Rakopoulos, C.D., 1992. "Comparative performance and emission studies when using olive oil as a fuel supplement in DI and IDI diesel engines," Renewable Energy, Elsevier, vol. 2(3), pages 327-331.
    2. Rakopoulos, C.D. & Scott, M.A. & Kyritsis, D.C. & Giakoumis, E.G., 2008. "Availability analysis of hydrogen/natural gas blends combustion in internal combustion engines," Energy, Elsevier, vol. 33(2), pages 248-255.
    3. Rakopoulos, C.D & Kyritsis, D.C, 2001. "Comparative second-law analysis of internal combustion engine operation for methane, methanol, and dodecane fuels," Energy, Elsevier, vol. 26(7), pages 705-722.
    4. Rakopoulos, C.D., 1992. "Olive oil as a fuel supplement in DI and IDI diesel engines," Energy, Elsevier, vol. 17(8), pages 787-790.
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    Citations

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    Cited by:

    1. Zhang, Bo & Ji, Changwei & Wang, Shuofeng & Liu, Xiaolong, 2014. "Combustion and emissions characteristics of a spark-ignition engine fueled with hydrogen–methanol blends under lean and various loads conditions," Energy, Elsevier, vol. 74(C), pages 829-835.
    2. Rakopoulos, C.D. & Kosmadakis, G.M. & Dimaratos, A.M. & Pariotis, E.G., 2011. "Investigating the effect of crevice flow on internal combustion engines using a new simple crevice model implemented in a CFD code," Applied Energy, Elsevier, vol. 88(1), pages 111-126, January.
    3. Prasad, B.V.V.S.U. & Sharma, C.S. & Anand, T.N.C. & Ravikrishna, R.V., 2011. "High swirl-inducing piston bowls in small diesel engines for emission reduction," Applied Energy, Elsevier, vol. 88(7), pages 2355-2367, July.
    4. Vudumu, Shravan K. & Koylu, Umit O., 2011. "Computational modeling, validation, and utilization for predicting the performance, combustion and emission characteristics of hydrogen IC engines," Energy, Elsevier, vol. 36(1), pages 647-655.
    5. Jemni, Mohamed Ali & Kassem, Sahar Hadj & Driss, Zied & Abid, Mohamed Salah, 2018. "Effects of hydrogen enrichment and injection location on in-cylinder flow characteristics, performance and emissions of gaseous LPG engine," Energy, Elsevier, vol. 150(C), pages 92-108.

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