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Distributed swirl combustion for gas turbine application

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

Abstract

Colorless distributed combustion (CDC) has been shown to provide significant improvement in gas turbine combustor performance. Colorless distributed combustion with swirl is investigated here to develop ultra-low emissions of NO and CO, and significantly improved pattern factor. Experimental investigations have been performed using a cylindrical geometry combustor with swirling air injection and axial hot gas exit stream from the combustor. Air was injected tangentially to impart swirl to the flow inside the combustor. The results obtained from the combustor have demonstrated very low levels of NO (∼3PPM) and CO (∼70PPM) emissions at an equivalence ratio of 0.7 and a high heat release intensity of 36MW/m3-atm under non-premixed combustion. To further simulate gas turbine operating conditions, inlet air to the combustor was preheated to 600K temperature and the combustor operated at 2atm pressure. Results showed very low levels of CO (∼10PPM) but the NO increased somewhat to ∼10PPM at an equivalence ratio of 0.5 and heat release intensity of 22.5MW/m3-atm under non-premixed combustion conditions. For premixed combustion, the combustor demonstrated low levels of both NO (5PPM) and CO (8PPM) at an equivalence ratio of 0.6 and a heat release intensity of 27MW/m3-atm. Results are reported at different equivalence ratios on the emission of NO and CO, lean stability limit and OH* chemiluminescence. These results suggest that further performance improvement can be achieved with improved fuel mixture preparation prior to the ignition of fuel at higher operational pressures using swirling combustor design for our quest to develop ultra low emission high intensity combustor for gas turbine application.

Suggested Citation

  • Khalil, Ahmed E.E. & Gupta, Ashwani K., 2011. "Distributed swirl combustion for gas turbine application," Applied Energy, Elsevier, vol. 88(12), pages 4898-4907.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:12:p:4898-4907
    DOI: 10.1016/j.apenergy.2011.06.051
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    References listed on IDEAS

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    1. Arghode, Vaibhav K. & Gupta, Ashwani K., 2011. "Investigation of forward flow distributed combustion for gas turbine application," Applied Energy, Elsevier, vol. 88(1), pages 29-40, January.
    2. 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.
    3. Arghode, Vaibhav K. & Gupta, Ashwani K., 2011. "Investigation of reverse flow distributed combustion for gas turbine application," Applied Energy, Elsevier, vol. 88(4), pages 1096-1104, April.
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    3. 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.
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    8. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2015. "Thermal field investigation under distributed combustion conditions," Applied Energy, Elsevier, vol. 160(C), pages 477-488.
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