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Numerical and Experimental Investigations of CH 4 /H 2 Mixtures: Ignition Delay Times, Laminar Burning Velocity and Extinction Limits

Author

Listed:
  • Simon Drost

    (Institute of Technical Thermodynamics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany)

  • Sven Eckart

    (Institute of Thermal Engineering, Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany)

  • Chunkan Yu

    (Institute of Technical Thermodynamics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany)

  • Robert Schießl

    (Institute of Technical Thermodynamics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany)

  • Hartmut Krause

    (Institute of Thermal Engineering, Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany)

  • Ulrich Maas

    (Institute of Technical Thermodynamics, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany)

Abstract

In this work, the influence of H 2 addition on the auto-ignition and combustion properties of CH 4 is investigated experimentally and numerically. Experimental ignition delay times (IDT) are compared with simulations and laminar burning velocities (LBVs), and extinction limits/extinction strain rates (ESRs) are compared with data from the literature. A wide variety of literature data are collected and reviewed, and experimental data points are extracted for IDT, LBV and ESR. The results are used for the validation of existing reaction mechanisms. The reaction mechanisms and models used are able to reproduce the influence of H 2 addition to CH 4 (e.g., shortening IDTs, increasing ESRs and increasing LBVs). IDTs are investigated in a range from 6 to 15 bar and temperatures from 929 to 1165 K with H 2 addition from 10 to 100 mol%. We show that LBV and ESR are predicted in a wide range by the numerical simulations. Moreover, the numerical simulations using detailed Aramco Mech 3.0 (581 species) are compared with the derived reduced reaction mechanism UCB Chen (49 species). The results show that the reduced chemistry obtained by considering only the IDT is also valid for LBV and ESR.

Suggested Citation

  • Simon Drost & Sven Eckart & Chunkan Yu & Robert Schießl & Hartmut Krause & Ulrich Maas, 2023. "Numerical and Experimental Investigations of CH 4 /H 2 Mixtures: Ignition Delay Times, Laminar Burning Velocity and Extinction Limits," Energies, MDPI, vol. 16(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:6:p:2621-:d:1093543
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    References listed on IDEAS

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    3. Minh Tien Nguyen & Van Van Luong & Quoc Thai Pham & Minh Tung Phung & Phu Nguu Do, 2022. "Effect of Ignition Energy and Hydrogen Addition on Laminar Flame Speed, Ignition Delay Time, and Flame Rising Time of Lean Methane/Air Mixtures," Energies, MDPI, vol. 15(5), pages 1-10, March.
    4. Yang, Xiehe & Wang, Tiantian & Zhang, Yang & Zhang, Hai & Wu, Yuxin & Zhang, Jiansheng, 2022. "Hydrogen effect on flame extinction of hydrogen-enriched methane/air premixed flames: An assessment from the combustion safety point of view," Energy, Elsevier, vol. 239(PC).
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    Cited by:

    1. Ilya E. Gerasimov & Tatyana A. Bolshova & Ksenia N. Osipova & Artëm M. Dmitriev & Denis A. Knyazkov & Andrey G. Shmakov, 2023. "Flame Structure at Elevated Pressure Values and Reduced Reaction Mechanisms for the Combustion of CH 4 /H 2 Mixtures," Energies, MDPI, vol. 16(22), pages 1-30, November.

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