Global reaction schemes for hydrocarbon combustion

Jones, W.P.; Lindstedt, R.P.

doi:10.1016/0010-2180(88)90021-1

Cited by 850 publications

(349 citation statements)

References 20 publications

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“…Even though the mechanism is able to capture correctly the laminar flame speed, it cannot predict the average flame position. CO errors with the 4-step mechanism have been reported in the literature [67] whereas the GRI3.0 mechanism gives slightly better CO and H 2 O, but not large enough to explain the CO discrepancies . The larger differences occur, surprisingly at r/D> 0.7 in the outer shear layer where the air/pilot shear layer interacts with the flame front ( See Fig 3) …”

Section: Sensitivity Analysis: Chemical Kineticsmentioning

confidence: 82%

“…The mechanism has been extensively validated and the laminar flame speed obtained with the chemical kinetics agrees very well with experimental data for the stoichiometric mixtures in this work. The 15-step mechanism solution will be compared against the 4-step global reaction scheme [67], which includes 7 species: H 2 , O 2 , H 2 O, CH 4 , CO, CO 2 and N 2 . Both methods are able to reproduce accurately the laminar burning velocity at stoichiometric conditions.…”

Section: Figmentioning

confidence: 99%

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Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Dodoulas

Navarro‐Martinez

2013

Flow Turbulence Combust

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Abstract. In the present study a Large Eddy Simulation and Filtered Density Function model is applied to three premixed piloted turbulent methane flames at different Reynolds Numbers using the Eulerian stochastic fields approach. The model is able to reproduce the flame structure and flow characteristics with a low number of fields (between 4 and 16 fields). The results show a good agreement with experimental data with the same closures employed in non-premixed combustion without any adjustment for combustion regime. The effect of heat release on the flow field is captured correctly. A wide range of sensitivity studies is carried out, including the number of fields, the chemical mechanism, differential diffusion effects and micro-mixing closures. The present work shows that premixed combustion (at least in the conditions under study) can be modelled using LES-PDF methods.. Finally, the ability of the model to predict flame quenching is studied. The model can accurate capture the conditions at which combustion is not sustainable and large pockets of extinction appear.

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Section: Sensitivity Analysis: Chemical Kineticsmentioning

confidence: 82%

Section: Figmentioning

confidence: 99%

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Dodoulas

Navarro‐Martinez

2013

Flow Turbulence Combust

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“…The homogeneous reactions of CO oxidation [38] and the combustion of methane, which is treated via the four step JonesLindstedt mechanism [39], are treated within the gaseous phase. Eq.…”

Section: Mathematical Modelmentioning

confidence: 99%

Reducing the CO2 emissions in Croatian cement industry

2013

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a b s t r a c tCement industry is one of the largest carbon emitting industrial sectors. It is responsible for about 5% of anthropogenic CO 2 in the world. Therefore, it is a relevant industrial sector for CO 2 emission regulation strategies. Bearing in mind the importance of cement industry in Croatia, and because of the fact that Croatia will soon become an EU member state, the present paper analyses the potential to reduce CO 2 emission in the Croatian cement industry. There are several measures that can reduce CO 2 emissions from the cement manufacturing process: the use of waste heat as an alternative source of energy; CO 2 capture and storage technologies; reduction of clinker to cement ratio; the use of alternative and biomass fuels; the use of alternative raw materials; an energy efficient combustion process. The most energy efficient technology for cement manufacturing today is the use of a rotary kiln together with a multi-stage preheater and a calciner. Since the use of cement calciners is a relatively new technology, further improvement of their operating conditions is still needed. This paper also highlights the results of research in the field of computational fluid dynamic (CFD) simulations that are used for the investigation of process and combustion emissions. The above mentioned measures together with numerical investigations can reduce the effect of cement manufacturing in Croatia on the environment and can make it more competitive with cement manufacturers from the EU.

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“…Further, additional homogeneous reactions are treated inside the gaseous phase for the oxidation of CO [34] and the combustion of methane, which is treated via the four step JoneseLindstedt mechanism [35]:…”

Section: Numerical Simulation Of a Cement Calciner 221 Mathematicamentioning

confidence: 99%

The application of CFD modelling to support the reduction of CO 2 emissions in cement industry

Mikulčić

Vujanović

Fidaros

et al. 2012

Energy

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a b s t r a c tThe cement industry is one of the leading producers of anthropogenic greenhouse gases, of which CO 2 is the most significant. Recently, researchers have invested a considerable amount of time studying ways to improve energy consumption and pollutant formation in the overall cement manufacturing process. One idea involves dividing the calcination and clinkering processes into two separate furnaces. The calcination process is performed in a calciner while the clinkering process takes place in a rotary kiln. As this is new technology in the cement manufacturing process, calciners are still in the research and development phase. The purpose of this paper is to demonstrate the potential of CFD to support the design and optimization of calciners, whose use appears to be essential in reduction of CO 2 emission during cement production. The mathematical model of the calcination process was developed, validated and implemented into a commercial CFD code, which was then used for the analysis. From the results obtained by these simulations, researchers will gain an in-depth understanding of all thermo-chemical reactions in a calciner. This understanding can be used to optimize the calciner's geometry, to make production more efficient, to lower pollutant formation and to subsequently reduce greenhouse gas emissions.

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Global reaction schemes for hydrocarbon combustion

Cited by 850 publications

References 20 publications

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Large Eddy Simulation of Premixed Turbulent Flames Using the Probability Density Function Approach

Reducing the CO2 emissions in Croatian cement industry

The application of CFD modelling to support the reduction of CO 2 emissions in cement industry

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