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Swirling flowfield for colorless distributed combustion

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

Abstract

Distributed combustion has been shown to provide significant improvements of gas turbine combustors performance including uniform thermal field in the entire combustion chamber (improved pattern factor), ultra-low emission of NOx and CO, low noise, enhanced stability and higher efficiency. The flowfield associated with swirl is investigated to seek colorless distributed combustion. Non-reacting Particle Image Velocimetry (PIV) diagnostics is employed to determine the flow field characteristics of three different configurations with focus on velocity distribution, flow entrainment of reactive species, and turbulence. In all the configurations, air was injected tangentially into the combustor. The results for the configurations reported here represent both non-swirling “linear” flow and swirling flow. Results showed that swirling flowfield configuration is characterized by higher flow velocities and much enhanced entrainment ratios throughout the combustor as compared to non-swirling case. Swirling flow exhibited high velocity region at the core of the combustor to further promote mixing and entrainment of reactive species. Higher velocities and entrainment are of significant importance in distributed combustion to prevent flame anchoring and enhance mixing. Experimental results are compared with numerical simulation for seeking improved flow distribution. The flowfield for different configurations are integrated with earlier data on emissions that showed near zero emission for swirling distributed combustion in gas turbine combustors.

Suggested Citation

  • Khalil, Ahmed E.E. & Gupta, Ashwani K., 2014. "Swirling flowfield for colorless distributed combustion," Applied Energy, Elsevier, vol. 113(C), pages 208-218.
    • Handle: RePEc:eee:appene:v:113:y:2014:i:c:p:208-218
    DOI: 10.1016/j.apenergy.2013.07.029
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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. Arghode, Vaibhav K. & Gupta, Ashwani K. & Bryden, Kenneth M., 2012. "High intensity colorless distributed combustion for ultra low emissions and enhanced performance," Applied Energy, Elsevier, vol. 92(C), pages 822-830.
    3. Arghode, Vaibhav K. & Khalil, Ahmed E.E. & Gupta, Ashwani K., 2012. "Fuel dilution and liquid fuel operational effects on ultra-high thermal intensity distributed combustor," Applied Energy, Elsevier, vol. 95(C), pages 132-138.
    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.
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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. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2015. "Toward ultra-low emission distributed combustion with fuel air dilution," Applied Energy, Elsevier, vol. 148(C), pages 187-195.
    3. Sun, Yuze & Rao, Zhuming & Zhao, Dan & Wang, Bing & Sun, Dakun & Sun, Xiaofeng, 2020. "Characterizing nonlinear dynamic features of self-sustained thermoacoustic oscillations in a premixed swirling combustor," Applied Energy, Elsevier, vol. 264(C).
    4. Khalil, Ahmed E.E. & Gupta, Ashwani K., 2014. "Velocity and turbulence effects on high intensity distributed combustion," Applied Energy, Elsevier, vol. 125(C), pages 1-9.
    5. Xing, Fei & Kumar, Arvind & Huang, Yue & Chan, Shining & Ruan, Can & Gu, Sai & Fan, Xiaolei, 2017. "Flameless combustion with liquid fuel: A review focusing on fundamentals and gas turbine application," Applied Energy, Elsevier, vol. 193(C), pages 28-51.
    6. 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.
    7. 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.

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