Numerical investigation of laminar hydrogen combustion across multiple flame configurations under pressure and strain effects
DOI:
https://doi.org/10.18686/cest525Keywords:
combustion; hydrogen; laminar; flames; CanteraAbstract
This research quantitatively examines laminar hydrogen combustion under diverse pressure and strain conditions, employing comprehensive chemical kinetics in Cantera 3.0 with the H2–O2 and GRI-Mech 3.0 mechanisms. To learn more about flame speed, structure, and extinction behavior, we looked at four main flame configurations: freely propagating premixed, counterflow diffusion, premixed counterflow, and stagnation-point flames. The laminar flame speed of pure hydrogen was 310 cm/s, which means it burned very quickly because it spread out quickly. Hydrogen stayed stable up to a strain rate of 6.0 × 105 s–1 before it went out. The peak flame temperature dropped from 3600 K to 3000 K when the pressure rose from 1 bar to 100 bar. This shows that higher pressure makes things more stable but less heat is released. The innovation of this study resides in the integration of all principal flame configurations into a cohesive modeling framework, demonstrating that strain rate exerts a more significant impact on flame collapse than pressure. These results give us a baseline for designing efficient turbines, rocket combustors, and industrial heating systems that run on hydrogen.
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