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Effect of Flame Shape on the Combustion Stability in a Low-Emission Combustor1

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Power Technology and Engineering Aims and scope

A computational and experimental investigation of the processes occurring in premix combustors with swirl stabilization similar to that used in modern gas-turbine engines is described. The combustor burner consists of main and pilot burners. The combustor operates on a mixture of natural gas and air with excess air coefficient from 10 to 2.6. The influence of the fuel fraction in the pilot burner (PFR) with fixed excess air coefficient á on the macrostructure of the flame — the relation between the shape and position of the flame front and the dominating structures of the flow — is examined. The flame front is investigated by means of three-dimensional numerical modeling. Four ma xxx crostructures are observed in the experimental PFR range from 0 to 100% with fixed excess air coefficient á. It is shown that each form of high-frequency combustion instability corresponds to a definite macrostructure of the flame. It is noted that the fuel fractions in the pilot burner at which changes are observed in the flame configuration are associated with the appearance of thermo-acoustic instability.

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References

  1. A. H. Lefebre, Gas Turbine Combustion, CRC Press (2012).

  2. S. V. Zhluktov, A. A. Aksenov, S. A. Kharchenko, I. V. Moskalev, G. B. Sushko, and A. S. Shishaeva, “Modeling of detached flows in the FlowVision software,” Vychisl. Metody Programmirovanie, 11 (2010).

  3. L. A. Bulysova and V. N. Gorban,” “Effect of mixing of fuel and air on the combustion process in low-emission combustors,” Teploénergetika, No. 9 (2013).

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Authors and Affiliations

  1. JSC “All-Russia Heat Engineering Institute” (VTI), Moscow, Russia

    V. D. Vasil’ev, L. A. Bulysova & A. L. Berne

Authors
  1. V. D. Vasil’ev
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  2. L. A. Bulysova
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  3. A. L. Berne
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Corresponding author

Correspondence to V. D. Vasil’ev.

Additional information

1 This article was prepared as part of work performed for the Ministry of Education and Science of the Russian Federation under contract No. 14.579.21.0085 (November 28, 2014).

Translated from Élektricheskie Stantsii, No. 12, December 2015, pp. 55 – 61.

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Vasil’ev, V.D., Bulysova, L.A. & Berne, A.L. Effect of Flame Shape on the Combustion Stability in a Low-Emission Combustor1 . Power Technol Eng 50, 65–70 (2016). https://doi.org/10.1007/s10749-016-0660-4

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  • DOI: https://doi.org/10.1007/s10749-016-0660-4

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