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Numerical and Experimental Investigation of a Non-Premixed Double Swirl Combustor

Author

Listed:
  • Jiming Lin

    (College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China
    Postdoctoral Workstation, Fujian South Highway Machinery Company, Quanzhou 362021, China)

  • Ming Bao

    (College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China)

  • Feng Zhang

    (College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China)

  • Yong Zhang

    (College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China)

  • Jianhong Yang

    (College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China
    Postdoctoral Workstation, Fujian South Highway Machinery Company, Quanzhou 362021, China)

Abstract

This paper focuses on a detailed numerical investigation combined with experimental research for a non-premixed swirl combustor, which aims to analyze the effects of the blade angle of the outer swirler and equivalence ratio on flow and combustion characteristics. In the experiment, the temperature in the furnace was obtained with a thermocouple, while a realizable k - ε turbulence model and two-step reaction mechanism of methane and air are used in the numerical method. The calculation results are in good agreement with the experimental data. The results reveal that the air flow rate through the swirler accounts for a small amount of the total air due to the influence of the draft fan, and there is no central recirculation zone (CRZ) despite the presence of the swirler. It was also found that NO emissions gradually decrease as the blade angle of the outer swirler increases. It was also indicated that the average temperature is 100 K higher than the general combustor with a 58° blade angle in the furnace by increasing the equivalent ratio of the tertiary air area, and the NO emissions reduced by approximately 25%. This study can provide guidance for the operation and structural design of non-premixed swirl combustors.

Suggested Citation

  • Jiming Lin & Ming Bao & Feng Zhang & Yong Zhang & Jianhong Yang, 2022. "Numerical and Experimental Investigation of a Non-Premixed Double Swirl Combustor," Energies, MDPI, vol. 15(2), pages 1-16, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:2:p:458-:d:721193
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    References listed on IDEAS

    as
    1. Yixiang Yuan & Qinghua Zeng & Jun Yao & Yongjun Zhang & Mengmeng Zhao & Lu Zhao, 2021. "Improving Blowout Performance of the Conical Swirler Combustor by Employing Two Parts of Fuel at Low Operating Condition," Energies, MDPI, vol. 14(6), pages 1-11, March.
    2. Jingyu Zhang & Yuqi Sun & Ji Li & Xiaomin He, 2020. "Study on the Hybrid Cooling of the Flame Tube in a Small Triple-Swirler Combustor," Energies, MDPI, vol. 13(21), pages 1-18, October.
    3. Marco Osvaldo Vigueras-Zúñiga & Carlos Augusto Ramírez-Ruíz & Agustín L. Herrera-May & María Elena Tejeda-del-Cueto, 2021. "Numerical and Experimental Analysis of the Effect of a Swirler with a High Swirl Number in a Biogas Combustor," Energies, MDPI, vol. 14(10), pages 1-21, May.
    4. Li, Xiaoyan, 2020. "Design of energy-conservation and emission-reduction plans of China’s industry: Evidence from three typical industries," Energy, Elsevier, vol. 209(C).
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