Numerical modeling for structure and NO x  formation characteristics of oxygen-enriched syngas turbulent non-premixed jet flames

Experimental and numerical investigations were performed to study the combustion characteristics of synthesis gas (syngas) under premixed swirling flame mode. Four different type of syngases, ranging from low to high H 2 content were tested and simulated. The global flame structures and post emission results were obtained from experimental work, providing the basis of validation for simulations using flamelet generated manifold (FGM) modelling approach via a commercial computational fluid dynamic software. The FGM method was shown to provide reasonable agreement with experimental result, in particular the post-exhaust emissions and global flame shapes. Subsequently, the FGM method was adopted to model the flame structure and predict the radical species in the reaction zones. Simulation result shows that H 2enriched syngas has lower peak flame temperature with lesser NO species formed in the reaction zone.

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“…High H 2 concentration in syngas is observed to produce more OH species. This result is consistent with the data reported by Park et al [47].…”

Section: Exhaust Gas Analysissupporting

confidence: 94%

Experimental and numerical studies on the premixed syngas swirl flames in a model combustor

Samiran

Chong

et al. 2019

International Journal of Hydrogen Energy

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“…The high mean deviation of NO mass fraction, as indicated in Table 3, is especially pronounced for the RSM-SBSL model compared to the other turbulence models. Other authors have reported the incapability of steady diffusion flamelet model to accurately estimates NOx species formation route [57,58]. There are several factors that affect the computation of NOx species by the turbulent combustion models, but one of the most important is related to the wide difference in kinetic time scale respect to other species formation and the assumption of fast chemistry for all species formation route.…”

Section: Tablementioning

confidence: 99%

Reynolds-Average Navier-Stokes Turbulence Models Assessment: A Case Study of Ch4/H2/N2-Air Reacting Jet

Lovella

Moya

Jayasuriya

et al. 2023

Preprint

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“…Therefore, the utilization of oxyfuel or oxygen-enriched combustion and CCS technology in IC engines has recently achieved a lot of attentions. Studies on oxygen-enriched combustion found that a slight increase of oxygen makes a remarkable decrease in smoke emissions as well as a decrease in CO and UHC (unburned hydrocarbon) emissions, however, the nitrogen oxide (NOx) emission has an obvious increase [5]. Different techniques such as exhaust gas recirculation (EGR) and optimized injection strategies have been applied to decrease NOx and particulates [6].…”

Section: Introductionmentioning

confidence: 99%

CFD Investigation of Hydrogen Combustion in Swirler Combustor

Mobasheri¹,

Peng²,

Aïtouche³

et al. 2022

Proceedings of the 3rd International Conference on Advances in Energy Research and Applications (ICAERA'23)

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A CFD model which is accompanied with detailed chemistry and has been firstly validated with experimental data achieved from a HSDI (High Speed Direct Injection) diesel engine has been applied to analyze the effects of intake oxygen temperature on engine performance characteristics under oxyfuel combustion condition. The simulation has been carried out at five different intake charge temperatures (140°C, 160°C, 180°C, 200°C, and 220°C). It was found that the implementation of oxyfuel HCCI combustion must be accompanied by an accurate intake temperature adjustment. Increasing intake charge temperature results in advancing the start of combustion along with a shorter main combustion stage which results in a reduction of IMEP and an increase of ISFC while decreasing intake charge temperature affects the combustion stability and leads to incomplete combustion.

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Numerical modeling for structure and NO x formation characteristics of oxygen-enriched syngas turbulent non-premixed jet flames

Cited by 16 publications

References 27 publications

Experimental and numerical studies on the premixed syngas swirl flames in a model combustor

Experimental and numerical studies on the premixed syngas swirl flames in a model combustor

Reynolds-Average Navier-Stokes Turbulence Models Assessment: A Case Study of Ch4/H2/N2-Air Reacting Jet

CFD Investigation of Hydrogen Combustion in Swirler Combustor

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