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September 10, 2025SAE technical papers on CD-ROM/SAE technical paper series

A Computational Study of Hydrogen Mixing and Combustion in a High-Speed Direct-Injection Spark-Ignition Engine

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Authors

RMRafael MenacaXLXinlei LiuFMFabio Santi Mortellaro

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Overview

This computational analysis evaluates combustion dynamics in hydrogen engines, highlighting turbulent flow challenges and lean-burn effectiveness.

Key Points

  • The study finds that incorporating DT instability effects is crucial for understanding combustion dynamics.
  • Engine testing revealed challenges in mixing hydrogen with air due to its low density and high-speed operations.
  • A lean-burn strategy with a global equivalence ratio of 0.4 was applied to mitigate emissions and enable efficient combustion.
  • The study utilized a flamelet-based combustion model to better understand turbulent mixing in hydrogen combustion.

Cite This Study

Menaca et al. (2025) studied this question.

synapsesocial.com/papers/68c1954e9b7b07f3a0618d05https://doi.org/10.4271/2025-24-0004
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