Combustion Instability Mode Transition in a Pilot Bluff-Body Stabilized Combustor
作者： Xiao Fu , Zhi-Hui Guo , Fu-Jiang Yang
DOI: 10.2514/1.B35774
关键词:
摘要: The pilot flame’s effects on dynamic stability have been investigated in a bluff-body stabilized combustor at atmospheric pressure. During the experiment, fuel proportion increased from 6 to 20% with an interval of 2%, while total equivalence ratio remained unchanged. Simultaneous pressure and unsteady heat release rate measurement analysis were used identify characterize combustion instability modes. Combustion dynamics captured by high-speed camera. High-speed images further analyzed using proper orthogonal decomposition. With increase proportion, transition between modes 33 130 Hz was observed. Based acoustic mode analysis, corresponded first second longitudinal mode, respectively. results show that affects local distribution shear layer recirculation zone. As result, it has significa...
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