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Combustion and stability characteristics of ultra-compact combustor using cavity for gas turbines

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  • Zhang, R.C.
  • Hao, F.
  • Fan, W.J.

Abstract

Engine efficiency, emission characteristics, and structural dimensions are important considerations for gas turbines that are used in transportation applications. Ultra-compact combustion technologies are attracting attention for use in the development of gas turbines due to their low emissions and low cost. This paper studies ultra-compact combustors for gas turbines through experimentation. Furthermore, an asymmetric combustor (fuelled with methane) is designed based on trapped-vortex combustion technology. In addition, four structural configurations of mainstream flame holders and three sizes of combustion zones are considered. The combustion, emission, and stability characteristics of seven combustors are experimentally studied in detail using a gas component analyser, particle image velocimetry, a dynamic pressure system, and a data acquisition system. The fuel adaptability of the combustor is analysed numerically. Under typical experimental conditions, the combustion efficiencies were higher than 94% and the emission indexes of unburned hydrocarbon and nitrogen oxide were in the range of 3–7 and 0.5–1.5 g/(kg fuel), respectively. Additionally, no combustion instability was observed for any experimental conditions. The inlet injection velocity of the mainstream zone (and the combustion power of the combustion zone) significantly influenced the emissions of carbon monoxide and unburned hydrocarbons, the combustion efficiency, and the dynamic pressure characteristics. The volume of the combustion zone, air injection velocity of the combustion zone, structural type, and blockage ratio of the mainstream flame holder all influenced the combustion and stability characteristics to different degrees.

Suggested Citation

  • Zhang, R.C. & Hao, F. & Fan, W.J., 2018. "Combustion and stability characteristics of ultra-compact combustor using cavity for gas turbines," Applied Energy, Elsevier, vol. 225(C), pages 940-954.
    • Handle: RePEc:eee:appene:v:225:y:2018:i:c:p:940-954
    DOI: 10.1016/j.apenergy.2018.05.084
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    References listed on IDEAS

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    1. Tyliszczak, Artur & Boguslawski, Andrzej & Nowak, Dariusz, 2016. "Numerical simulations of combustion process in a gas turbine with a single and multi-point fuel injection system," Applied Energy, Elsevier, vol. 174(C), pages 153-165.
    2. Zhang, R.C. & Fan, W.J. & Xing, F. & Song, S.W. & Shi, Q. & Tian, G.H. & Tan, W.L., 2015. "Experimental study of slight temperature rise combustion in trapped vortex combustors for gas turbines," Energy, Elsevier, vol. 93(P2), pages 1535-1547.
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    Citations

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    Cited by:

    1. Zhang, Rongchun & Xu, Quanyong & Fan, Weijun, 2018. "Effect of swirl field on the fuel concentration distribution and combustion characteristics in gas turbine combustor with cavity," Energy, Elsevier, vol. 162(C), pages 83-98.
    2. Han, Zhezhe & Hossain, Md. Moinul & Wang, Yuwei & Li, Jian & Xu, Chuanlong, 2020. "Combustion stability monitoring through flame imaging and stacked sparse autoencoder based deep neural network," Applied Energy, Elsevier, vol. 259(C).
    3. Zhang, R.C. & Bai, N.J. & Fan, W.J. & Huang, X.Y. & Fan, X.Q., 2019. "Influence of flame stabilization and fuel injection modes on the flow and combustion characteristics of gas turbine combustor with cavity," Energy, Elsevier, vol. 189(C).
    4. Zhang, R.C. & Bai, N.J. & Fan, W.J. & Yan, W.H. & Hao, F. & Yin, C.M., 2018. "Flow field and combustion characteristics of integrated combustion mode using cavity with low flow resistance for gas turbine engines," Energy, Elsevier, vol. 165(PA), pages 979-996.
    5. Zhang, R.C. & Huang, X.Y. & Fan, W.J. & Bai, N.J., 2019. "Influence of injection mode on the combustion characteristics of slight temperature rise combustion in gas turbine combustor with cavity," Energy, Elsevier, vol. 179(C), pages 603-617.
    6. Zhao, Yuling & He, Xiaomin & Li, Mingyu, 2020. "Effect of mainstream forced entrainment on the combustion performance of a gas turbine combustor," Applied Energy, Elsevier, vol. 279(C).

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