Work

Computational Analysis of Minimum Ignition Energy of Hydrogen–Air Mixtures: Influence of Chemical Reaction Mechanisms

Year: 2025

Type: article

Abstract: In this study, computational fluid dynamics simulations were performed to quantitatively evaluate the minimum ignition energy of premixed hydrogen–air mixtures using two detailed chemical kinetic mechanisms: GRI-Mech 3.0 and San Diego Mechanism. By systematically varying the ignition energy, the San Diego Mechanism predicted an MIE of 19.6 μJ, with only a 4.1% deviation from the reference value, whereas GRI-Mech 3.0 predicted 28.6 μJ, corresponding to a 49.8% error. These discrepancies are attributed to differences in the reaction pathways and rate constants defined in the two mechanisms. Notably, the San Diego Mechanism exhibited consistently higher rate constants for key chain-branching reactions, facilitating enhanced radical accumulation and more favorable conditions for ignition initiation.

Source: Fire science and engineering

DOI: 10.7731/kifse.2d038b12

Authors: Dong-Ju Kim, Seul-Hyun Park

Language: English

Topic: Advanced Combustion Engine Technologies

Subfield: Fluid Flow and Transfer Processes

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

Funders: Ministry of Trade, Industry and Energy, Korea Institute of Energy Technology Evaluation and Planning

Awards: G559520453, G5873136014