Akademik Veri Yönetim Sistemi
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.101, ss.1014-1028, 2025 (SCI-Expanded)
Identifying the parameters that cause combustion instabilities is one of the most critical issues that have attracted attention in recent years regarding reducing combustion emissions. The combustion instabilities can be overcome by either oxygen enrichment or swirling flow, which gas turbines and many furnace burners can use in various applications. Temperature distribution, pollutant emissions, dynamic pressure, and luminous intensity parameters have been examined at 80% methane and 20% hydrogen fuel mixture enriched with different oxygen ratios using a swirl-stabilized premixed burner within the scope of the present study. In addition, the swirling flow effect on combustion characteristics of 80% CH4 and 20% H2 fuel mixture has been experimentally investigated under non-acoustic and various acoustic excitation conditions. Swirl numbers studied have been selected from low to high values (0.4, 0.8, 1.2, and 1.6). The natural resonance frequencies of the combustion chamber (95 Hz, 175 Hz, and 260 Hz) have been used for acoustic excitation. It is concluded that the increased oxygen ratio in the oxidizer resulted in higher flame temperature for all cases. Namely, a temperature increment of 5 % was observed for each enrichment. It is also revealed that the change in swirl number occurred temperature increase of 3 % due to better flame stabilization.