| Citation: | CHENG Xu, SHI Yunjiao, LU Jinghe, et al. Impact of fuel injection modes on combustion and emissions of coaxial staged combustor[J]. Journal of Aerospace Power, 2026, 41（3）：20240534 doi: 10.13224/j.cnki.jasp.20240534
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In response to the challenges of difficult rapid evaporation and poor uniformity of the fuel-air mixture in lean premixed gas turbine combustion, an experimental and numerical simulation method was employed to analyze the impact of dual-fluid atomization nozzles under vertical and horizontal injection modes, by considering different fuel distribution ratios on the performance of a coaxial staged combustor. The results showed that under the simulated conditions, the horizontal fuel injection mode exhibited better uniformity of fuel distribution compared with the vertical injection scheme. Under vertical injection conditions, an increase in near-wall high-temperature areas led to elevated emissions and a deteriorated outlet temperature distribution. Under the 0.35—1.0 conditions, as the main fuel ratio in the primary stage increased with horizontal injection, NOx initially increased and then decreased, while CO and outlet temperature distribution factor showed an overall increasing trend. Through experimental studies conducted under wide operating conditions, optimal fuel distribution ratios under different conditions were determined.
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