Evaluation of a Turbulent Non-premixed Combustion Model for the Design of an Ammonia-fueled Burner

Gibeom Park; Won Yang; Taeyoung Chae; Changkook Ryu

doi:10.15231/jksc.2024.29.4.108

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2024 Vol.29, Issue 4 Preview Page Next Page

Research Article

Evaluation of a Turbulent Non-premixed Combustion Model for the Design of an Ammonia-fueled Burner 암모니아 전소 버너 설계를 위한 난류 비예혼합 연소 해석 모델의 평가

31 December 2024. pp. 108-118

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Abstract

Ammonia has emerged as a carbon-free fuel to replace conventional fossil fuels for CO₂ emission reduction. However, it has a low flame speed, low flame temperature, and potential for high NO_x emissions compared to conventional fuels. Computation fluid dynamics(CFD) can play a key role in developing industrial ammonia-fueled burners to achieve stable ignition and suppress NO_x-forming reactions. However, the large computational domain restricts the use of advanced models such as eddy dissipation concept(EDC) for consideration of the detailed reaction mechanism with turbulence-chemistry interaction. In this study, the performance of the steady and unsteady diffusion flamelet models(S/UDFM) for ammonia combustion was evaluated in a 80 kW_th non-premixed swirl burner. Although S/UDFM overestimated N₂O emissions, it effectively captured NO_x and ammonia emission trends similar to that of EDC under different combustion conditions. When compared to experiments, S/UDFM predicted NO and NH₃ emission trend effectively, making it a computationally efficient reaction model for CFD applications to design evaluation of industrial ammonia combustion systems.

Keywords

Ammonia

Swirl burner

Turbulent non-premixed combustion

Eddy dissipation concept

Steady diffusion flamelet model

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Information

Publisher :The Korean Society of Combustion
Publisher(Ko) :한국연소학회
Journal Title :Journal of the Korean Society of Combustion
Journal Title(Ko) :한국연소학회지
Volume : 29
No :4
Pages :108-118
Received Date : 2024-12-16
Revised Date : 2024-12-18
Accepted Date : 2024-12-18
DOI :https://doi.org/10.15231/jksc.2024.29.4.108

Journal of the Korean Society of Combustion ISSN:1226-0959(Print) 2466-2089(Online) 한국연소학회지

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