Numerical simulation of an ethanol turbulent spray flame with RANS and diffusion combustion model

Filho, Fernando Luiz Sacomano; Fukumasu, Newton Kiyoshi; Krieger, G.

doi:10.1007/s40430-013-0029-7

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…With increasing distance away from the nozzle exit, a decreasing emission angle with respect to the flame axis was observed and attributed to refraction effects from temperature-dependent gradients in the flame sound speed. [128]/ [131] LES Eulerian-Lagrangian with two different combustion models, presumed PDF and ATF, were undertaken. Combustion was modelled using the FGM chemistry table built with fully adiabatic freely propagating premixed at constant equivalence ratio flamelets; progress variable species coefficients were empirically tested using different combinations.…”

Section: Closure Remarksmentioning

confidence: 99%

Are the available data from laboratory spray burners suitable for CFD modelling validations? A review

Lopes

Emekwuru²,

Joshi³

2022

Energy Conversion and Management: X

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Section: Closure Remarksmentioning

confidence: 99%

Are the available data from laboratory spray burners suitable for CFD modelling validations? A review

Lopes

Emekwuru²,

Joshi³

2022

Energy Conversion and Management: X

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“…The result showed that the high temperature region where the oil combustion was intense and generated a high temperature was located from 0 to 0.4 m. Figure 16 depicts the profiles of the gas temperature obtained along the burner axis. Actually, the turbulence-flame interaction in turbulent flames accounting for the presence of a dispersed phase may affect the axial position where the maximum temperature is [37][38][39]. However, this interaction may not affect the overall temperature tendency.…”

Section: Impact Of the Oil Feed Rate On Ignition Performance And Wall Temperaturementioning

confidence: 99%

Numerical Simulation of the Effects of Oil Gun Location and Oil Feed Rate on Coal Ignition and Burner Wall Temperature in a Tiny Oil Ignition Burner

Zhong

Chen

et al. 2021

Energies

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To solve the overheating problem of tiny oil ignition burners’ walls during the firing-up process in a 330 MWe tangentially pulverized coal-fired boiler, a numerical model of a tiny oil ignition burner was carefully built considering combustion, gas–solid flow, and heat transfer. Then, the burner location and oil feed rate were optimized based on the model to prevent the burner’s walls from overheating. The effects of the oil gun extension distance (100, 200, 300, 400, 500 mm) and oil feed rate (160, 140, 120, 100, 80, 70, 60 kg/h) on coal ignition performance and burner wall temperature were carefully investigated. The simulation results showed good agreement with the measured results. The results indicated that decreasing the oil gun distance within the burner diminished the flame length of the co-combustion of oil and pulverized coal, thus lowering the burner wall temperature. Decreasing the oil feed rate appropriately could also reduce the burner wall temperature without influencing the ignition performance. Considering both ignition performance and burner wall temperature, an extension of 400 mm of the oil gun location and an oil feed rate of 160 kg/h were successfully applied to the actual operation without adverse effects. Moreover, it is suggested to move the temperature monitor points from the burner upper wall to the burner side wall.

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“…Similarly, Ozmen-Cagatay and Kocaman (2010) also got results to dam-break flows, comparing experimental and numerical results using a commercially available CFD program, solving RANS equations with k-ε turbulence model involving the Shallow Water equations. Sacomano Filho, Fukumasu and Krieger (2013) Time and cost as well as flexibility of the simulation setup are the main advantages of using a CFD software, although commercial CFD tools are commonly expensive. As an alternative to these softwares, the opensource package OpenFOAM has been used mainly by researches in computational fluid analysis.…”

Section: Introductionmentioning

confidence: 99%

Turbulence Models Applied to Classical Fluid Mechanics and Heat Transfer Problems - The Performance Evaluation of the Open Source CFD Package Openfoam

Rocha

Marinho

Santos

et al. 2021

ACERTTE

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Topics related to the modeling of turbulent flow feature significant relevance in several areas, especially in engineering, since the vast majority of flows present in the design of devices and systems are characterized to be turbulent. A vastly applied tool for the analysis of such flows is the use of numerical simulations based on turbulence models. Thus, this work aims to evaluate the performance of several turbulence models when applied to classic problems of fluid mechanics and heat transfer, already extensively validated by empirical procedures. The OpenFOAM open source software was used, being highly suitable for obtaining numerical solutions to problems of fluid mechanics involving complex geometries. The problems for the evaluation of turbulence models selected were: two-dimensional cavity, Pitz-Daily, air flow over an airfoil, air flow over the Ahmed blunt body and the problem of natural convection between parallel plates. The solution to such problems was achieved by utilizing several Reynolds Averaged Equations (RANS) turbulence models, namely: k-ε, k-ω, Lam-Bremhorst k-ε, k-ω SST, Lien-Leschziner k-ε, Spalart-Allmaras, Launder-Sharma k-ε, renormalization group (RNG) k-ε. The results obtained were compared to those found in the literature which were empirically obtained, thus allowing the assessment of the strengths and weaknesses of the turbulence modeling applied in each problem.

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Numerical simulation of an ethanol turbulent spray flame with RANS and diffusion combustion model

Cited by 6 publications

References 14 publications

Are the available data from laboratory spray burners suitable for CFD modelling validations? A review

Are the available data from laboratory spray burners suitable for CFD modelling validations? A review

Numerical Simulation of the Effects of Oil Gun Location and Oil Feed Rate on Coal Ignition and Burner Wall Temperature in a Tiny Oil Ignition Burner

Turbulence Models Applied to Classical Fluid Mechanics and Heat Transfer Problems - The Performance Evaluation of the Open Source CFD Package Openfoam

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