Numerical simulation of pollutants from non-premixed combustion of


	CH4 /H2 under multivariate wide-range conditions

Abstract

Abstract:

This article takes the jet-in-hot-coflow (JHC) combustor as the research object and conducts numerical simulation

of pollutants from non-premixed combustion of hydrogen blended methane under multivariate wide-range conditions. Quantitative analysis is conducted on the effects of hydrogen blended ratio of central fuel jet, velocity of

central fuel jet, and the oxygen content and temperature of the hot coflow on combustion temperature, reaction rate,

and the generation of major pollutants. The results show that with an increase of hydrogen blended ratio, the

reaction at the inlet becomes more intense and the temperature peak is higher, the combustion rate increases, the

high-temperature region becomes wider, the mass fraction of CO and CO2 decrease, while the mass fraction of NOx

increases. As the oxygen mass fraction of hot coflow increases, the mass fraction of CO first increases and then

decreases, and the increase of the NOx mass fraction peak can reach 250% . With the increase of hot coflow

temperature, CO mass fraction increases, CO2 mass fraction decreases, and the average increase of the NOx mass

fraction peak can reach 230%. This paper can provide basic theoretical support for predicting pollutant emissions

of hydrogen blended fuels in engineering applications.

Key words:

hydrogen blended methane, non-premixed combustion, combustion characteristics, pollutant

CLC Number:

TK16

ZHANG Hong, LI Linjun, WANG Xiaodong.

Numerical simulation of pollutants from non-premixed combustion of

CH4 /H2 under multivariate wide-range conditions

[J]. Journal of Civil Aviation University of China, 2025, 43(4): 74-83.

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Numerical simulation of pollutants from non-premixed combustion of

CH4 /H2 under multivariate wide-range conditions

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