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Towards distributed combustion for ultra low emission using swirling and non-swirling flowfields

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  • Khalil, Ahmed E.E.
  • Gupta, Ashwani K.

Abstract

Colorless Distributed Combustion (CDC) has been demonstrated to provide ultra-high combustion intensity, increased performance in terms of ultra-low emissions, uniform thermal field, combustion stability and enhanced efficiency. CDC has been examined under both swirling and non-swirling configurations using different injection velocities to seek improved distributed combustion. CDC performance has also been evaluated at different operational temperatures and equivalence ratios. The results are analyzed to determine the key factors that affect distributed combustion regime. Data showed key parameters for distributed combustion include recirculation ratio (defined as the ratio of the recirculated mass in the combustor to the mass of the fresh mixture), flow injection velocity, fuel injection scheme, and geometrical configuration for the operating condition. The results showed that increase in recirculation ratio and air injection velocity foster distributed reaction conditions. Fuel injection location and separation distance between air and fuel injection points played a critical role on fuel mixing and the resulting emissions. Impact of temperature and pressure varied with the operating equivalence ratio. A hybrid combination of the above parameters provides distribution index (DI) that reveals how well the chemical reaction zone is distributed within the combustion regime.

Suggested Citation

  • Khalil, Ahmed E.E. & Gupta, Ashwani K., 2014. "Towards distributed combustion for ultra low emission using swirling and non-swirling flowfields," Applied Energy, Elsevier, vol. 121(C), pages 132-139.
    • Handle: RePEc:eee:appene:v:121:y:2014:i:c:p:132-139
    DOI: 10.1016/j.apenergy.2014.01.081
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    References listed on IDEAS

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    1. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2011. "Distributed swirl combustion for gas turbine application," Applied Energy, Elsevier, vol. 88(12), pages 4898-4907.
    2. Khalil, Ahmed E.E. & Arghode, Vaibhav K. & Gupta, Ashwani K. & Lee, Sang Chun, 2012. "Low calorific value fuelled distributed combustion with swirl for gas turbine applications," Applied Energy, Elsevier, vol. 98(C), pages 69-78.
    3. Khalil, Ahmed E.E. & Arghode, Vaibhav K. & Gupta, Ashwani K., 2013. "Novel mixing for ultra-high thermal intensity distributed combustion," Applied Energy, Elsevier, vol. 105(C), pages 327-334.
    4. Arghode, Vaibhav K. & Gupta, Ashwani K., 2010. "Effect of flow field for colorless distributed combustion (CDC) for gas turbine combustion," Applied Energy, Elsevier, vol. 87(5), pages 1631-1640, May.
    5. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2011. "Swirling distributed combustion for clean energy conversion in gas turbine applications," Applied Energy, Elsevier, vol. 88(11), pages 3685-3693.
    6. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2014. "Swirling flowfield for colorless distributed combustion," Applied Energy, Elsevier, vol. 113(C), pages 208-218.
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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. Karyeyen, Serhat & Feser, Joseph S. & Jahoda, Edward & Gupta, Ashwani K., 2020. "Development of distributed combustion index from a swirl-assisted burner," Applied Energy, Elsevier, vol. 268(C).
    3. Enagi, Ibrahim I. & Al-attab, K.A. & Zainal, Z.A., 2018. "Liquid biofuels utilization for gas turbines: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 43-55.
    4. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2015. "Impact of internal entrainment on high intensity distributed combustion," Applied Energy, Elsevier, vol. 156(C), pages 241-250.
    5. Khidr, Kareem I. & Eldrainy, Yehia A. & EL-Kassaby, Mohamed M., 2017. "Towards lower gas turbine emissions: Flameless distributed combustion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 1237-1266.

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