Modeling of hydrogen-enriched natural gas on flame speed propagation

Abstract This study investigates the effects of hydrogen addition on the laminar flame speed of natural gas using computational simulations performed with Cantera. The calculated laminar flame speed of hydrogen-enriched natural gas mixtures was simulated across a range of equivalence ratios (0.6-2) and hydrogen fractions (0-25% by volume). The modified GRI-Mech 3.0 mechanism was employed. Results demonstrate a significant increase in laminar flame speed with increasing hydrogen content, with the effect more pronounced at higher equivalence ratios. The peak flame speed was observed in stoichiometric conditions with increasing hydrogen fraction. The highest speed is achieved with a 25% hydrogen concentration in a natural gas mixture, reaching 45.219 cm/s at an equivalence ratio of 0.9. This study provides insights into the combustion characteristics of hydrogen-enriched natural gas and demonstrates the utility of Cantera for such simulations.