Laminar flame speed of hydrogen-enriched sustainable aviation fuel: Experiments and chemical kinetic modeling

作者：Congjie Hong, Janardhanraj Subburaj, Jiabiao Zou, Ayman M. Elbaz, William L. Roberts, Zuohua Huang, Yingjia Zhang, Aamir Farooq · 发表于：Combustion and Flame · 年份：2025 · DOI：10.1016/j.combustflame.2025.114613 · 被引用次数：4 · 研究领域：Combustion and flame dynamics、Advanced Combustion Engine Technologies、Heat transfer and supercritical fluids

The development of sustainable aviation fuels (SAFs) is essential for reducing carbon emissions in the aviation industry. Fischer-Tropsch Synthetic Paraffinic Kerosene (FT-SPK) has emerged as a promising SAF candidate, and hydrogen enrichment offers a viable strategy to enhance its combustion performance. This study systematically investigates the laminar flame characteristics of FT-SPK blended with hydrogen under varying conditions, including hydrogen blending ratios from 0 % to 95 % (mole fraction), pressures of 1 to 2 bar, and equivalence ratios ranging from 0.7 to 1.2. Experimental measurements and chemical kinetic modeling were performed to assess the effects of hydrogen addition on combustion stability, flame propagation, and the underlying mechanisms governing flame speed enhancement. Results show that hydrogen enrichment significantly increases the laminar flame speed of FT-SPK/air mixtures, with the stronger effect observed under fuel-rich conditions. Furthermore, the global activation energy of FT-SPK/H 2 /air flames shows distinct trends concerning equivalence ratio: hydrogen increases the activation energy under lean conditions by enhancing chain-branching reactions, while it decreases the activation energy under rich conditions by facilitating low-activation-energy reaction pathways. The developed chemical kinetic model accurately predicts experimental flame speeds across all tested conditions, providing a valuable tool for future studies on hydrogen-enriched SAF...