Modeling of NOx Formation in Diffusion Flame Combustors PDF Download
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Author: N. K. Rizk
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Languages : en
Pages :
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Author: N. K. Rizk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Weizhen Zhang
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Category :
Languages : en
Pages : 576
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Author: N. K. Rizk
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Category : Combustion
Languages : en
Pages : 0
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Author: Naif Mohammed Al-Abbadi
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Category :
Languages : en
Pages : 426
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Author: Howard G. Maahs
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Category : Combustion
Languages : en
Pages : 62
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Author: Chaoqun Liu
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Category : Multigrid methods (Numerical analysis)
Languages : en
Pages : 43
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An implicit multigrid time-stepping technique is applied to the laminar diffusion methane-air combustion with detailed description of NOx formation in a 3-D channel. The chemical reaction model is assumed to have 48 species and 229 finite-rate, reversible reaction steps. The computation requires about 90 time steps to reduce the residual by 3 orders of magnitude on a 34 x 18 x 18 grid.
Author: Jerald A. Cole
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Category : Combustion
Languages : en
Pages : 3
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A model of the gas-phase chemistry involved in the combustion of simple hydrocarbon fuels and the interconversion of fixed nitrogen species has been developed. One focus of the work was on modeling the chemistry involved in reburning and other advanced NO[subscript x] control strategies. A second focus was on the decay rate of various hydrocarbon species under high-temperature conditions. This provided an initial step towards the chemistry needed to model fuel burnout in small combustors, e.g., wood stoves. The approach was to compare rates for elementary reactions as represented in the different compilations available in the literature. Where inconsistencies appeared, the original literature on the rates was consulted. The mechanism was tested against benchmark data so that the key reactions that controlled any inconsistencies could be identified. Adjustments to the rates were allowed if they fell within the error bounds of the original determination.
Author: N. K. Rizk
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Category :
Languages : en
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Author: Fukuo Maeda
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Category :
Languages : en
Pages : 0
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Presented at the International Gas Turbine and Aeroengine Congress and Exposition, Houston, Texas - June 5-8, 1995.
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Languages : en
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Turbulent hydrogen diffusion flames diluted with nitrogen are currently being studied to assess their ability to achieve the DOE Turbine Program's aggressive emissions goal of 2 ppm NOx in a hydrogen-fueled IGCC gas turbine combustor. Since the unstrained adiabatic flame temperatures of these diluted flames are not low enough to eliminate thermal NOx formation the focus of the current work is to study how the effects of flame residence time and global flame strain can be used to help achieve the stated NOx emissions goal. Dry NOx measurements are presented as a function of jet diameter nitrogen dilution and jet velocity for a turbulent hydrogen/nitrogen jet issuing from a thin-lipped tube in an atmospheric pressure combustor. The NOx emission indices from these experiments are normalized by the flame residence time to ascertain the effects of global flame strain and fuel Lewis Number on the NOx emissions. In addition dilute hydrogen diffusion flame experiments were performed in a high-pressure combustor at 2 4 and 8 atm. The NOx emission data from these experiments are discussed as well as the results from a Computational Fluid Dynamics modeling effort currently underway to help explain the experimental data.
