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Flamelet LES of oxy-fuel swirling flames with different O2/CO2 ratios using directly coupled seamless multi-step solid fuel kinetics

Nicolai, Hendrik ; Debiagi, Paulo ; Janicka, Johannes ; Hasse, Christian (2023)
Flamelet LES of oxy-fuel swirling flames with different O2/CO2 ratios using directly coupled seamless multi-step solid fuel kinetics.
In: Fuel, 344
doi: 10.1016/j.fuel.2023.128089
Article, Bibliographie

Abstract

Oxy-fuel combustion, in combination with carbon capture technologies, has generated significant interest since it has a high potential for rapid CO2 cutbacks for newly built and retrofitted coal-fired power plants. Although research and development of oxy-fuel combustion technologies have been advancing recently, the combustion of solid fuels in an oxygen–carbon dioxide environment is not yet fully understood. In particular, the oxygen content in the recirculated flue gas is an adjustable parameter in oxy-fuel combustion. This work aims to analyze its impact on the thermo-chemical conversion by applying a recently developed approach for accurately predicting pulverized solid fuel combustion to a range of oxy-fuel swirl flames. The employed modeling framework builds upon a detailed solid fuel kinetic mechanism that seamlessly describes the entire solid conversion process. For the description of the gas phase, a combined flamelet modeling approach with large-eddy simulation is applied. This previously introduced high-fidelity framework (Nicolai et al., 2022) was applied to three operating points in a pilot-scale facility, for which in-reactor data is available. The overall model, combined the available experimental data, is employed for the three operating points with different oxidizer O2/CO2 ratios to give deeper insights into combustion. In particular, the influence of the local oxygen partial pressure on the solid fuel conversion is analyzed in detail.

Item Type: Article
Erschienen: 2023
Creators: Nicolai, Hendrik ; Debiagi, Paulo ; Janicka, Johannes ; Hasse, Christian
Type of entry: Bibliographie
Title: Flamelet LES of oxy-fuel swirling flames with different O2/CO2 ratios using directly coupled seamless multi-step solid fuel kinetics
Language: English
Date: March 2023
Publisher: Elsevier
Journal or Publication Title: Fuel
Volume of the journal: 344
DOI: 10.1016/j.fuel.2023.128089
URL / URN: https://www.sciencedirect.com/science/article/pii/S001623612...
Abstract:

Oxy-fuel combustion, in combination with carbon capture technologies, has generated significant interest since it has a high potential for rapid CO2 cutbacks for newly built and retrofitted coal-fired power plants. Although research and development of oxy-fuel combustion technologies have been advancing recently, the combustion of solid fuels in an oxygen–carbon dioxide environment is not yet fully understood. In particular, the oxygen content in the recirculated flue gas is an adjustable parameter in oxy-fuel combustion. This work aims to analyze its impact on the thermo-chemical conversion by applying a recently developed approach for accurately predicting pulverized solid fuel combustion to a range of oxy-fuel swirl flames. The employed modeling framework builds upon a detailed solid fuel kinetic mechanism that seamlessly describes the entire solid conversion process. For the description of the gas phase, a combined flamelet modeling approach with large-eddy simulation is applied. This previously introduced high-fidelity framework (Nicolai et al., 2022) was applied to three operating points in a pilot-scale facility, for which in-reactor data is available. The overall model, combined the available experimental data, is employed for the three operating points with different oxidizer O2/CO2 ratios to give deeper insights into combustion. In particular, the influence of the local oxygen partial pressure on the solid fuel conversion is analyzed in detail.

Uncontrolled Keywords: Pulverized solid fuel combustion, Detailed solid fuel kinetics, Oxy-fuel combustion, Flamelet modeling
Additional Information:

Artikel-ID: 128089

Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Simulation of reactive Thermo-Fluid Systems (STFS)
Date Deposited: 20 Mar 2023 07:05
Last Modified: 20 Mar 2023 07:05
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