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Effects of operating parameters on the combustion oscillation behaviour in a lean premixed CH4 combustor

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Abstract

This article experimentally studies the influence of operating parameters on thermoacoustic instability in a lean premixed combustor. The combustion chamber length and methane flow rate were selected as the operating parameter. Experimental results show that the flame experienced different oscillation modes as the combustion chamber length varies. With the nonlinear time-series analyzing tools, such as phase space reconstruction or recurrence plot, the dynamic characteristics of thermoacoustic instability can be acquired. As the methane flow rate increased from 2.0 L/min to 4.5 L/min, the thermoacoustically flame evolves from a chaotic state to a limit cycle state. There exists extreme oscillation point as the combustion chamber length increased from 100 mm to 800 mm. The maximum thermoacoustic instability point occurred at 600 mm. The flame shape is tightly connected with the thermoacoustic instability process, and a hollow inner recirculation region emerged. This article can promote the application of passive control methods in the prevention of combustion instability.

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Acknowledgements

This work was supported by the National Science Fund for Distinguished Young Scholars [No. 51825605] of China.

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Authors and Affiliations

  1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Zheda Road 38, Hangzhou, 310027, China

    Chengfei Tao & Hao Zhou

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  1. Chengfei Tao
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  2. Hao Zhou
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Correspondence to Hao Zhou.

Additional information

Chengfei Tao is a Ph.D. candidate at the State Key Laboratory of Clean Energy Utilization, Zhejiang University, China. He received his M.S. degree from Southeast University. His research interests include combustion instability control and the flame nonlinear dynamics.

Hao Zhou is a Professor and Deputy Director of the State Key Laboratory for Clean Energy Utilization in Zhejiang University, China. He received his Ph.D. from Zhejiang University. He is the recipient of the National Science Fund for Distinguished Young Scholars of China. His research interests include the energy efficient utilization and lower pollution control, combustion instability control of thermal power plant, solar tower molten salt power generation and advanced energy storage.

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Tao, C., Zhou, H. Effects of operating parameters on the combustion oscillation behaviour in a lean premixed CH4 combustor. J Mech Sci Technol 35, 3753–3762 (2021). https://doi.org/10.1007/s12206-021-0744-4

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  • DOI: https://doi.org/10.1007/s12206-021-0744-4

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