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PreprintCC BY-NC-ND 4.0arXiv

Characteristics of extinction behavior of ammonia partial cracking simulated fuels in counterflow premixed flames under lean condition

  • Jinseong Kim
  • Hyunchang Lee
  • Keeman Lee
  • Assaad R. Masri
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Abstract

In this study, the lean extinction behaviors of CH4 and a 16% cracked ammonia surrogate fuel, CR16, in counterflow premixed flames were compared. Experiments were conducted along with one-dimensional simulations using OPPDIF; the GRI-Mech 3.0 and UCSD mechanisms were applied to CH4 and CR16, respectively. CR16 exhibited higher extinction strain rates and resilience to strain-induced blow-out (RSIB) than those of CH4 under lean conditions. At Phi = 0.66, although both flames had the same extinction strain rate, CR16 showed a higher RSIB because of its longer flame time. Near its extinction, CR16 sustained H2 consumption, radical reactions, and heat release through the interflame region toward the stagnation plane. Hydrogen oxidation coupled with nitrogen-related pathways, including NH2 + NO and HNO reactions, supported this behavior. These results clarify the chemical basis for the superior extinction resistance of economically favorable low-cracking-ratio ammonia fuel.

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Cite

BibTeXRIS
BibTeX
@misc{kim2026characteristics,
  title = {{Characteristics of extinction behavior of ammonia partial cracking simulated fuels in counterflow premixed flames under lean condition}},
  author = {Jinseong Kim and Hyunchang Lee and Keeman Lee and Assaad R. Masri},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.07605},
  eprint = {2610.07605},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.07605},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Characteristics of extinction behavior of ammonia partial cracking simulated fuels in counterflow premixed flames under lean condition
AU  - Jinseong Kim
AU  - Hyunchang Lee
AU  - Keeman Lee
AU  - Assaad R. Masri
PY  - 2026
DA  - 2026/10/06
PB  - arXiv
DO  - 10.48550/arxiv.2610.07605
UR  - https://arxiv.org/abs/2610.07605
AB  - In this study, the lean extinction behaviors of CH4 and a 16% cracked ammonia surrogate fuel, CR16, in counterflow premixed flames were compared. Experiments were conducted along with one-dimensional simulations using OPPDIF; the GRI-Mech 3.0 and UCSD mechanisms were applied to CH4 and CR16, respectively. CR16 exhibited higher extinction strain rates and resilience to strain-induced blow-out (RSIB) than those of CH4 under lean conditions. At Phi = 0.66, although both flames had the same extinction strain rate, CR16 showed a higher RSIB because of its longer flame time. Near its extinction, CR16 sustained H2 consumption, radical reactions, and heat release through the interflame region toward the stagnation plane. Hydrogen oxidation coupled with nitrogen-related pathways, including NH2 + NO and HNO reactions, supported this behavior. These results clarify the chemical basis for the superior extinction resistance of economically favorable low-cracking-ratio ammonia fuel.
ER  -