Large eddy simulation of a pulverized coal jet flame ignited by a preheated gas flow

Yamamoto, Kenji; Murota, Tomoya; Okazaki, Teruyuki; Taniguchi, Masayuki

doi:10.1016/j.proci.2010.05.113

Cited by 94 publications

(67 citation statements)

References 18 publications

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“…Kurose and Makino [5] performed the first LES of a hypothetical solid fuel flame, where the fuel was modelled as pure methane and the simulation results were presented without any comparison to experimental data. Yamamoto et al [6] performed a LES of a pre-heated pulverised coal flame. Edge et al [7] and Gharebaghi et al [8] carried out the first LES of a 1 MWth scale test facility.…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Franchetti

Marincola

Navarro‐Martinez

et al. 2016

Fuel

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Large Eddy Simulation (LES) has been applied to the swirling 100 kW th OXYCOAL-AC test facility of Aachen University. A set of models to represent devolatilisation, volatile combustion, char combustion and radiation for oxy-coal combustion in an LES framework has been implemented and tested. A qualitative analysis of the flow behaviour and the overall coal combustion processes occurring within the furnace was made. The LES results for the flow field were compared to axial and tangential mean velocity measurements, showing good agreement, particularly in the upstream regions of the flame. The LES results were also compared to oxygen concentrations and gas temperature. Overall good agreement was observed in the upstream central regions of the flame, whilst downstream the LES overestimated the combustion rates. The results show the potential of using LES for more complex oxy-coal combustion burners and opens the way for applications to industrial furnaces.

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Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Franchetti

Marincola

Navarro‐Martinez

et al. 2016

Fuel

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“…However, it has not been examined for coal combustion using simulations. We developed an experimental apparatus to evaluate lift-off height of continuous coal flames, and LES (large eddy simulation) results were verified with the experimental results [23]. Figure 17 shows schematic drawings of the pulverized coal jet flame experiment [27].…”

Section: Experimental Equipmentmentioning

confidence: 91%

“…Numerical analyses were first applied to evaluate heat absorption by the furnace wall [19], since then they have been applied to such environmental performance factors as NOx emission [20,21] and to control furnace wall corrosion [22]. Evaluation of flame stability, such as prediction of blow-off limit, is possible, but, this evaluation is relatively difficult [23,24]. Figure 2 shows the temperature distribution (a) and streamlines (b) in a burner neighborhood.…”

Section: Ignition and Flame Propagation Phenomena For Pulverized Coalmentioning

confidence: 99%

“…Particle diameter was a very important factor for ignition. The combustible gas formed by pyrolysis of fine particles was strongly related to ignition [23,27]. Pyrolysis of intermediate size coals (0.037-0.074 mm) began at the ignition region where the small flames formed and grew.…”

Section: Coal + Primary Airmentioning

confidence: 99%

“…Lift-off height is usually used for an index of flame stability. Yamamoto et al [23] have examined the effect of coal concentration on lift-off height for coal combustion by LES. The flame propagation velocity and lean flammability limit model could successfully evaluate the relationship between coal concentration and flame propagation velocity.…”

Section: Relation Between the Experiments Of Continuous Flames And Thmentioning

confidence: 99%

See 2 more Smart Citations

Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Taniguchi¹

2012

Thermal Power Plants

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Identification of the initial particle size distribution for coal combustion simulations

Shen

Zhou

et al. 2019

AIChE Journal

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Pulverized coal generally features wide particle-size distributions (PSD). How to set an initial PSD in coal combustion simulation remains an open question. To answer this, the Gaussian-quadrature theory was applied to provide a discrete reconstruction of the PSD described by Rosin-Rammler and Upper-Limit functions. From the perspective of the moments of PSD, a theoretical analysis was conducted for mass, momentum, and energy exchange terms between gas and particle phases in pulverized coal jet flame. The analysis presented that the first, the second and the third moments of PSD were the most important to capture the flame ignition behavior. The large eddy simulations showed that the proposed method with two or more particle sizes could provide good predictions of flame ignition distances. And Sauter mean diameter (D 32 ) could represent the complete PSD when predicting the ignition behavior of pulverized coal jet flame. K E Y W O R D Scoal combustion, Gaussian quadrature, initial particle size distribution, large eddy simulation, moments

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Large eddy simulation of a pulverized coal jet flame ignited by a preheated gas flow

Cited by 94 publications

References 18 publications

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Large Eddy Simulation of a 100 kWth swirling oxy-coal furnace

Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Identification of the initial particle size distribution for coal combustion simulations

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