Author(s)

Shihao Zuo ¹, Zhijie Cai ²

Affiliation(s)

¹ College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China
² School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China

Corresponding Author

Shihao Zuo

ABSTRACT

Hydrogen micro-mixing combustion technology is to quickly mix air and hydrogen through many microchannels to form a micro-scale flame, which can shorten the residence time of nitrogen in the high temperature region, thus greatly reducing the formation of nitrogen oxides, and solving the problem that hydrogen is easy to backfire and thermoacoustic oscillation under traditional premixed combustion. Based on ANSYS Fluent software, Realizable k-epsilon model, scalable wall function (SWF) and laminar flame model (FGM) are selected in this paper. The combustion characteristics of different pore aperture, pore spacing and pore types of fuel micro-holes in micro-mixing combustion chamber are numerically simulated. Through the analysis of combustor outlet temperature, combustion uniformity and NOx emission, it is found that too large and too small aperture and hole spacing will aggravate the formation of NOx. The combustion temperature of the round hole is the lowest but the uniformity is the worst, and the influence of the elliptical hole and the square hole with equal area on the combustion is not significantly different. In this paper, the influence of the geometric structure of fuel micropores on combustion is studied. And it provides a reference for the design optimization of micro-mixing combustor.

KEYWORDS

Gas turbine; Hydrogen; Micro-mixing combustion; Fuel micropore; NOx

CITE THIS PAPER

Shihao Zuo, Zhijie Cai, Numerical Comparative Analysis of the Influence of Fuel Micro-Hole Geometry on the Combustion Characteristics of Hydrogen Micro-Mixing Combustor. Modern Physical Chemistry Research (2024) Vol. 4: 93-104. DOI: http://dx.doi.org/10.23977/mpcr.2024.040113.

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