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Experimental investigations on flow field and combustion characteristics of a model trapped vortex combustor

Author

Listed:
  • Jin, Yi
  • Li, Yefang
  • He, Xiaomin
  • Zhang, Jingyu
  • Jiang, Bo
  • Wu, Zejun
  • Song, Yaoyu

Abstract

Experimental studies are carried out to investigate cold flow field and combustion performance of a workable liquid-fueled trapped vortex combustor (TVC). A remarkable design of the model is that all the air flows through the combustor is supplied from a single source, which makes it distinct from most of the models mentioned in open literatures. Planar particle image velocimetry (PIV) is used to measure the cold flow field, with particular emphasis placed on vortical flow pattern within cavities, turbulence intensity distribution and interaction between cavity stream and mainstream. The aim of the PIV measurement is to better understand the underlying flow physics in a TVC, as well as to provide a benchmark for validation and improvement of computational models. Combustion experiments are carried out with preheated air (473K) at atmospheric pressure using liquid kerosene. Flame images at different operating conditions are obtained and the effects of fuel to air ratio (FAR) and inlet Mach number on the physical appearance of flames are clearly revealed. The fuel to air ratio at lean blow out (LBO) is in the range from 0.0043 to 0.0056 as the inlet Mach number varies from 0.15 to 0.30, which indicates good flame stability. The combustion efficiency falls reasonably in the range of 92–100%. The improvement of the radial profile of outlet temperatures indicates the effectiveness of dilution holes.

Suggested Citation

  • Jin, Yi & Li, Yefang & He, Xiaomin & Zhang, Jingyu & Jiang, Bo & Wu, Zejun & Song, Yaoyu, 2014. "Experimental investigations on flow field and combustion characteristics of a model trapped vortex combustor," Applied Energy, Elsevier, vol. 134(C), pages 257-269.
    • Handle: RePEc:eee:appene:v:134:y:2014:i:c:p:257-269
    DOI: 10.1016/j.apenergy.2014.08.029
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    References listed on IDEAS

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    1. Zhang, R.C. & Fan, W.J. & Shi, Q. & Tan, W.L., 2014. "Combustion and emissions characteristics of dual-channel double-vortex combustion for gas turbine engines," Applied Energy, Elsevier, vol. 130(C), pages 314-325.
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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. Li, Mingyu & Wang, Qian & He, Xiaomin & Xiao, Jiankun & Ma, Heng, 2022. "Effects of fuel injection on the combustion and emission performance of a trapped vortex combustor," Energy, Elsevier, vol. 252(C).
    3. 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.
    4. Huang, Yakun & He, Xiaomin & Zhang, Huangwei & Zhu, Zhixin & Zhu, Huanyu, 2022. "Flame stability optimization of cavity primary air-jet form in an augmentor," Energy, Elsevier, vol. 239(PA).
    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).
    7. 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.
    8. Li, Mingyu & He, Xiaomin & Zhao, Yuling & Jin, Yi & Yao, Kanghong & Ge, Zhenghao, 2018. "Performance enhancement of a trapped-vortex combustor for gas turbine engines using a novel hybrid-atomizer," Applied Energy, Elsevier, vol. 216(C), pages 286-295.
    9. Miao, Junjie & Fan, Yuxin & Wu, Weiqiu & Zhao, Shilong, 2021. "Effect of air-assistant on ignition and flame-holding characteristics in a cavity-strut based combustor," Applied Energy, Elsevier, vol. 283(C).

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