Effect of hydrogen addition on combustion and thermal characteristics of impinging non-premixed jet flames for various heating value gases

Effects of hydrogen addition on soot emission of methane and propane coaxial jet diffusion flames

“…It is reported that PAH emissions are greatly reduced by hydrogen addition. Thermal characteristics of non-premixed jet flames were examined to evaluate effects of hydrogen addition on CO and NOx emissions (Nam et al, 2023). Even turbulent non-premixed hydrogen-blended flames in an industrial swirl burner were conducted (Gee et al, 2024).…”

“…Since we can discuss a two-dimensional cross-section of the flame, the laser diagnostics are very useful. Previous measurements were conducted by OH-LIF and PAH-LIF (Ezenwajiaku et al, 2019;Nam et al, 2023), CARS (Gülder et al, 1996), and a laser induced incandescence (LII) Do et al, 2021;He et al, 2021;Wang et al, 2023).…”

“…Then, the LII signal was converted to the soot volume fraction based on the linearity between them. As for the hydrogen-blended hydrocarbon diffusion flames, more research using methane (Ezenwajiaku et al, 2019;Do et al, 2021;He et al, 2021;Wang et al, 2021;Nam et al, 2023;Gee et al, 2024) and propane (Gülder et al, 1996;He et al, 2021;Nam et al, 2023;Wang et al, 2023) has been conducted. In experiments, the two-dimensional distribution of the soot concentration was obtained, and the maximum soot volume fraction and the total soot volume were evaluated from the LII signal.…”