Experimental and Numerical Study of a Two-Stage Swirl Burner

Jiming Lin, Haozhen Li, Yong Zhang and Jianhong Yang
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Jiming Lin: College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China
Haozhen Li: 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

Energies, 2022, vol. 15, issue 3, 1-19

Abstract: In this study, we developed the design process and optimization of structural parameters of a new low-NO x burner based on low-NO x combustion technology and the flame stabilization principle. Firstly, on the basis of the two-stage swirl burner, we applied the fuel-graded combustion technology and introduced the central nozzle structure to explore the influence law of graded combustion on NO x emissions. Secondly, on the previously optimized structure, the matching law between the first- and second-stage cyclone blades is analyzed to obtain the optimum structural design solution for heat exchange efficiency and flame front length. Finally, a new conical blunt structure is introduced in conjunction with the flame stabilization principle, and we discuss the effects of different half cone angles on the flame stabilization, flame front length, and heat exchange efficiency of the burner. The research in this paper provides a reliable direction for the design optimization of low-NO x burners.

Keywords: low-NO x burner; flame stabilization; fuel-staging; optimal design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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