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Calculation of the flow field and NOx emissions of a gas turbine combustor by a coarse computational fluid dynamics model

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  • Gobbato, Paolo
  • Masi, Massimo
  • Toffolo, Andrea
  • Lazzaretto, Andrea
  • Tanzini, Giordano

Abstract

Gas turbine performance is strongly dependent on the flow field inside the combustor. In the primary zone, the recirculation of hot products stabilises the flame and completes the fuel oxidation. In the dilution zone, the mixing process allows to obtain the suitable temperature profile at turbine inlet. This paper presents an experimental and computational analysis of both the isothermal and the reactive flow field inside a gas turbine combustor designed to be fed with natural gas and hydrogen. The study aims at evaluating the capability of a coarse grid CFD model, already validated in previous reactive calculations, in predicting the flow field and NOx emissions. An experimental campaign was performed on an isothermal flow test rig to investigate the combustion air splitting and the penetration of both primary and dilution air jets. These experimental data are used to validate the isothermal computations. The impact of combustion on the calculated flow field and on air splitting is investigated as well. Finally, NOx emission trend estimated by a post-processing technique is presented. The numerical NOx concentrations at the combustor discharge are compared with experimental measurements acquired during operation with different fuel burnt (natural gas or hydrogen) and different amount of steam injected.

Suggested Citation

  • Gobbato, Paolo & Masi, Massimo & Toffolo, Andrea & Lazzaretto, Andrea & Tanzini, Giordano, 2012. "Calculation of the flow field and NOx emissions of a gas turbine combustor by a coarse computational fluid dynamics model," Energy, Elsevier, vol. 45(1), pages 445-455.
    • Handle: RePEc:eee:energy:v:45:y:2012:i:1:p:445-455
    DOI: 10.1016/j.energy.2011.12.013
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    Cited by:

    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. Woo, Mino & Choi, Byung Chul & Ghoniem, Ahmed F., 2016. "Experimental and numerical studies on NOx emission characteristics in laminar non-premixed jet flames of ammonia-containing methane fuel with oxygen/nitrogen oxidizer," Energy, Elsevier, vol. 114(C), pages 961-972.
    3. Wei, Zhongbao & Li, Xiaolu & Xu, Lijun & Cheng, Yanting, 2013. "Comparative study of computational intelligence approaches for NOx reduction of coal-fired boiler," Energy, Elsevier, vol. 55(C), pages 683-692.
    4. Xie, Qiaofeng & Wen, Haocheng & Li, Weihong & Ji, Zifei & Wang, Bing & Wolanski, Piotr, 2018. "Analysis of operating diagram for H2/Air rotating detonation combustors under lean fuel condition," Energy, Elsevier, vol. 151(C), pages 408-419.
    5. Woo, Mino & Choi, Byung Chul, 2021. "Numerical study on fuel-NO formation characteristics of ammonia-added methane fuel in laminar non-premixed flames with oxygen/carbon dioxide oxidizer," Energy, Elsevier, vol. 226(C).
    6. Karimi, Nader, 2014. "Response of a conical, laminar premixed flame to low amplitude acoustic forcing – A comparison between experiment and kinematic theories," Energy, Elsevier, vol. 78(C), pages 490-500.
    7. Gao, Xuan & Duan, Fei & Lim, Seng Chuan & Yip, Mee Sin, 2013. "NOx formation in hydrogen–methane turbulent diffusion flame under the moderate or intense low-oxygen dilution conditions," Energy, Elsevier, vol. 59(C), pages 559-569.

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