Volatilization and Burning of Pulverized Coal, with Radiation Heat Transfer Effects, in a Counter Flow Combustor

Greenberg, J.B.; Goldman, Y.

doi:10.1080/00102208908924018

Cited by 11 publications

(3 citation statements)

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“…122 Results from numerical investigations indicated the presence of optimal pulverized coal particle size and flow conditions to attain maximum combustion efficiency. 123,124 A very recent work by Wen et al 125 explores the application of flamelet model in simulating coal combustion. The flamelet model as described in an earlier section can provide a significant computational advantage over conventional models.…”

Section: Addition Of Solid Particlesmentioning

confidence: 99%

Advances in understanding combustion phenomena using non-premixed and partially premixed counterflow flames: A review

Ravikrishna

Sahu

2017

International Journal of Spray and Combustion Dynamics

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Counterflow flames provide an ideal platform for understanding the flame structure and as a model to study the effect of physical and chemical perturbations on the flame structure. This article reviews the advances made in the understanding of combustion dynamics and chemistry through experimental and numerical studies in counterflow non-premixed and partially premixed flames. Key contributions on fundamental aspects such as extinction, ignition and effect of perturbations on the stability of diffusion flames are first summarized and analysed. The review then focuses on the progress made in the understanding of the effect of inert particles and flame suppressants on the flame characteristics. A review of detailed studies on edge flames facilitates further understanding of local quenching and re-ignition phenomena in highly turbulent flames. The influence of radiation model and unsteady flow-conditions on the flame kinetics and dynamics along with work on NO x kinetics has been discussed. The review also outlines that specific experiments need to be carried out over a wide range of conditions for further understanding and validation of numerical models.

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Section: Addition Of Solid Particlesmentioning

confidence: 99%

Advances in understanding combustion phenomena using non-premixed and partially premixed counterflow flames: A review

Ravikrishna

Sahu

2017

International Journal of Spray and Combustion Dynamics

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“…Studies of alternative improved combustors based on the opposed flow principle have been reported by Goldberg and Essenhigh (1978) and Goldman et al (1981). More recently, Hazanov et al (1985) and Greenberg et al (1989) described an opposed flow eombustor in which secondary and tertiary air are supplied in the final stage of combustion.…”

mentioning

confidence: 99%

Combustion of pulverized coal in counter-current flow. [Final report], December 7, 1988--April 30, 1991

Timnat¹,

Goldman²

1991

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, _ r_ .... "__ "i_"'_, U manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom-_ i_ ,,,': _-<._| mendation, or favoring by the United States Government or any agency thereof. The views _i_ _.'_t I,.ll and opinions of authors expressed herein do not necessarily state or reflect those of the United ,qf _es Government or any agency thereof.

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“…However, the swirl-type or bluff-body combustors have not been run successfully for low-grade coals in unpreheated air in China (Fu, et al, 1986). Counter-flow (Greenberg and Goldman, 1990) or opposed-jet flame (Schaffer and Cambel, 1955) stabilizers were also developed, but they are not as practical as the swirler-type or bluff-body combustor and few applications were reported. Chen (1990) and Schefer (1989) had studied the similarities and differences between swirl-type and bluff-body combustors and between turbulent-jet and bluff-body combustors.…”

Section: Introductionmentioning

confidence: 99%

Pulverized-Coal Combustion in Wall-Protecting-Jets Combustor (WPJC)

Zhou

Fleck²,

Gauthier³

et al. 2001

Combustion Science and Technology

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A new type of pulverized-coal combustor, called "Wall-Protecting-Jets Combustor" (hereafter, WPJC) has been proposed, designed and studied with both CFD (Computational Fluid Dynamics) and experimental methods. The WPJC is based on a novel concept in which all inlet jets are along the combustor wall. Pilot combustion experiments were conducted to investigate the combustion performance of WPJc. Two-phase flows and pulverized-coal combustion were simulated to study the mechanism of WPJC using the commercial software FLUENT. The results show that the WPJC has many remarkable advantages: wall-protection by the cold jets without the use of refractory materials; low-temperature and three-stage combustion with low NOx emission; negligible ash/slag-deposition; multiple functions with convenient switching between them; effective adjustment of the combustion intensity and the ignition position.

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Volatilization and Burning of Pulverized Coal, with Radiation Heat Transfer Effects, in a Counter Flow Combustor

Cited by 11 publications

References 0 publications

Advances in understanding combustion phenomena using non-premixed and partially premixed counterflow flames: A review

Advances in understanding combustion phenomena using non-premixed and partially premixed counterflow flames: A review

Combustion of pulverized coal in counter-current flow. [Final report], December 7, 1988--April 30, 1991

Pulverized-Coal Combustion in Wall-Protecting-Jets Combustor (WPJC)

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