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Autoignition Characterization of Hydrogen Directly Injected into a Constant-Volume Combustion Chamber through a Heavy-Duty Injector

Author

Listed:
  • Antonio Caricato

    (Department of Engineering for Innovation, University of Salento, Via per Arnesano, 73100 Lecce, Italy)

  • Antonio Paolo Carlucci

    (Department of Engineering for Innovation, University of Salento, Via per Arnesano, 73100 Lecce, Italy)

  • Magda Elvira Cassone Potenza

    (Department of Mechanical Engineering, Mathematics and Management (DMMM), Polytechnic University of Bari, Via Orabona 4, 70126 Bari, Italy)

  • Domenico Laforgia

    (Department of Engineering for Innovation, University of Salento, Via per Arnesano, 73100 Lecce, Italy)

  • Marco Torresi

    (Department of Mechanical Engineering, Mathematics and Management (DMMM), Polytechnic University of Bari, Via Orabona 4, 70126 Bari, Italy)

  • Luciano Strafella

    (Department of Engineering for Innovation, University of Salento, Via per Arnesano, 73100 Lecce, Italy)

Abstract

One factor limiting the exploitation of hydrogen as a fuel in internal combustion engines is their tendency to autoignition. In fact, on one hand, its low activation energy facilitates autoignition even with low compression ratios; on the other hand, this can become uncontrollable, due, for instance, to the presence of hot spots in the combustion chamber or to the collision of hydrogen on close surfaces. This represents a limit to the use of hydrogen at medium–high loads, therefore limiting the power density of the engine. In this work, hydrogen was injected at a pressure ranging between 15 and 25 bars into a constant-volume combustion chamber in which the temperature and pressure were increased by means of a previous combustion event. The phenomena taking place after hydrogen injection were observed through fast image acquisition and characterized by measuring the chamber pressure and temperature. In particular, ignition sites were established. The physical system was also modeled in Ansys Fluent environment, and the injection and mixture formation were simulated in order to evaluate the thermo-fluid dynamic field inside the combustion chamber just before autoignition.

Suggested Citation

  • Antonio Caricato & Antonio Paolo Carlucci & Magda Elvira Cassone Potenza & Domenico Laforgia & Marco Torresi & Luciano Strafella, 2023. "Autoignition Characterization of Hydrogen Directly Injected into a Constant-Volume Combustion Chamber through a Heavy-Duty Injector," Energies, MDPI, vol. 16(19), pages 1-14, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:19:p:6823-:d:1248203
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    References listed on IDEAS

    as
    1. Wei Wei & Xu He & Hairong Zhu & Junfa Duan & Gaolin Qin, 2022. "Effect of Different Combustion Modes on the Performance of Hydrogen Internal Combustion Engines under Low Load," Sustainability, MDPI, vol. 14(10), pages 1-18, May.
    2. Wenzhi Gao & Zhen Fu & Yong Li & Yuhuai Li & Jiahua Zou, 2022. "Progress of Performance, Emission, and Technical Measures of Hydrogen Fuel Internal-Combustion Engines," Energies, MDPI, vol. 15(19), pages 1-26, October.
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