What question did this study set out to answer?

This work aims to investigate spark ignition and flame kernel formation in hydrogen-air mixtures under engine-relevant conditions.

December 11, 2025Automotive and Engine TechnologyOpen Access

Numerical investigation on spark ignition and flame kernel formation of lean premixed hydrogen/air flame under ICE condition

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Authors

CYChunkan YuKarlsruhe Institute of Technology BKBrijesh KinkhabwalaKarlsruhe Institute of Technology CWChunwei WuKarlsruhe Institute of Technology

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Implication

Numerical investigation reveals the role of chemical kinetics and transport in spark ignition of hydrogen-air mixtures, implying insights for reducing emissions.

Key Points

This work aims to investigate spark ignition and flame kernel formation in hydrogen-air mixtures under engine-relevant conditions.
Used a one-dimensional numerical model based on the INSFLA solver with cylindrical geometry.
Analyzed ignition phase dynamics considering chemical kinetics and molecular transport effects.
Simulations based on conditions from a hydrogen-fueled internal combustion engine operation point.
Identified key chemical kinetic factors such as chain-branching and chain-termination affecting flame kernel speed.
Demonstrated that NO emissions are dominated by thermal NO at high temperatures and influenced by the NNH pathway during ignition.
Provided insights for optimizing spark ignition strategies and reducing NOx emissions.

Cite This Study

Yu et al. (2025) studied this question.

synapsesocial.com/papers/69401b0c2d562116f28f7052 https://doi.org/10.1007/s41104-025-00162-w

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Implication

Numerical investigation reveals the role of chemical kinetics and transport in spark ignition of hydrogen-air mixtures, implying insights for reducing emissions.

Numerical investigation on spark ignition and flame kernel formation of lean premixed hydrogen/air flame under ICE condition

Discussion

Member takes

Implication

Key Points

Cite This Study

Numerical investigation on spark ignition and flame kernel formation of lean premixed hydrogen/air flame under ICE condition

Discussion

Member takes

Implication

Key Points

Cite This Study

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