Large-eddy simulation of a lean-premixed hydrogen flame in a low-swirl combustor under combustion instability

• DOI: 10.1063/5.0166412
• Publication Date: 2023-10-11T14:18:46Z
• Authors: Jun Nagao; Abhishek Lakshman...; Takeshi Shoji; Shigeru Tachibana; Takeshi Yokomori; Ryoichi Kurose
• Keywords: Large-Eddy Simulation; Flame structure; Decoupling (probability)

Large-eddy simulation (LES) of a lean-premixed hydrogen turbulent jet flame with combustion instability (CI) in low-swirl combustor (LSC) is performed by employing dynamically thickened model detailed chemical reaction 9 species and 20 reactions, the LES validity CI characteristics are investigated detail. The results show that present can accurately reproduce experimentally observed such as intensity, frequency, sporadic decay pressure oscillations, flame–flow interaction inducing periodic transitions an inverted conical structure flat LSC. oscillations caused temporal decoupling heat release rate outward inward deflections inflow, which associated flow behavior upstream injector channel, respectively.