Experimental investigation on thermoacoustic oscillation of a new dual-swirl combustor

HE Zuqiang; WANG Ping; Meenatchidevi Murugesan; Antonio Ferrante; LI Weichao; JIANG Linsong

doi:10.11729/syltlx20200021

Volume 35 Issue 1

Feb. 2021

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Article Navigation > Journal of Experiments in Fluid Mechanics > 2021 > 35(1): 44-52

HE Zuqiang, WANG Ping, Meenatchidevi Murugesan, et al. Experimental investigation on thermoacoustic oscillation of a new dual-swirl combustor[J]. Journal of Experiments in Fluid Mechanics, 2021, 35(1): 44-52. doi: 10.11729/syltlx20200021

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Experimental investigation on thermoacoustic oscillation of a new dual-swirl combustor

doi: 10.11729/syltlx20200021

1.
School of Energy and Power Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China
2.
Institute for Energy Research of Jiangsu University, Zhenjiang Jiangsu 212013, China
3.
Centro Combustione Ambiente Spa, vicinale Milano km 1. 600, 70023 Gioia del Colle(Ba) Italy

Received Date: 2020-02-24
Rev Recd Date: 2020-05-27
Publish Date: 2021-02-25

Abstract

Abstract

In this paper, a new type of dual-swirl combustor is tested. The effects of two varying processes of combustion state parameters on the thermoacoustic oscillation characteristics of flame are studied. The two processes are: keep methane volume flow rate constant and reduce the equivalence ratio from 0.900 to 0.725 and then increase it back to 0.925; keep the equivalence ratio constant as 0.850 and increase the premixed gas volume flow. The results show that there are two distinct flame patterns of M-shaped and V-shaped in this combustor. In process 1, the flame changes from unstable M-shaped flame to stable V-shaped flame with decreaseing equivalence ratio, and then changes to M-shaped flame with increaseing equivalence ratio, the combustor exists hysteresis phenomenon; In process 2, Thermoacoustic oscillation is only found at the initial flow rate, and the flame becomes stable with increaseing flow rate.Through the analysis of the power spectrum characteristics and phase space reconstruction of the pressure fluctuation signal, it is found that there are unstable frequencies around 400.0 and 256.0 Hz in this dual-swirl combustor.
- dual-swirl combustor,
- lean premixed combustion,
- thermoacoustic oscillation,
- flame structure,
- phase space reconstruction

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References(17)

References

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