A hybrid scalar model for sooting turbulent flames

Aksit, I.M.; Moss, J.B.

doi:10.1016/j.combustflame.2005.10.010

Cited by 29 publications

(10 citation statements)

References 25 publications

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“…Pitsch et al [41] had good success predicting soot properties of a turbulent gas jet using a hybrid model, which combined a simplified soot model with a flamelet model to predict the gas-phase species. Aksit and Moss [42] reported success modeling a turbulent jet with a hybrid model for sooting hydrocarbon combustion that combined a twostep soot model with the flamelet approximation for the remaining scalars. A simplified model for soot formation and oxidation in a computational fluid dynamics (CFD) simulation of non-premixed hydrocarbon flames was developed by Lautenberger et al [10].…”

Section: Introductionmentioning

confidence: 99%

Soot properties of laminar jet diffusion flames in microgravity

Díez¹,

Aalburg²,

Sunderland³

et al. 2009

Combustion and Flame

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Section: Introductionmentioning

confidence: 99%

Soot properties of laminar jet diffusion flames in microgravity

Díez¹,

Aalburg²,

Sunderland³

et al. 2009

Combustion and Flame

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“…1,44,45 Similarly, accurate modeling of the formation and destruction of PAH and soot in turbulent flames is currently a severe challenge, in and of itself. [46][47][48][49] For this reason, we have chosen to implement piloted burners and focus on intermediate values of fuel jet Reynolds numbers that do not suffer from substantial local extinction, which is challenging to model with even simple, well-understood fuel chemistry. [50][51][52] Five flames, using two different fuels, have been chosen as standard flames on these two new burners.…”

Section: Introductionmentioning

confidence: 99%

Design of “model-friendly” turbulent non-premixed jet burners for C2+ hydrocarbon fuels

Zhang

Shaddix

Schefer

2011

Review of Scientific Instruments

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Experimental measurements in laboratory-scale turbulent burners with well-controlled boundary and flow configurations can provide valuable data for validating models of turbulence-chemistry interactions applicable to the design and analysis of practical combustors. This paper reports on the design of two canonical nonpremixed turbulent jet burners for use with undiluted gaseous and liquid hydrocarbon fuels, respectively. Previous burners of this type have only been developed for fuels composed of H(2), CO, and/or methane, often with substantial dilution. While both new burners are composed of concentric tubes with annular pilot flames, the liquid-fuel burner has an additional fuel vaporization step and an electrically heated fuel vapor delivery system. The performance of these burners is demonstrated by interrogating four ethylene flames and one flame fueled by a simple JP-8 surrogate. Through visual observation, it is found that the visible flame lengths show good agreement with standard empirical correlations. Rayleigh line imaging demonstrates that the pilot flame provides a spatially homogeneous flow of hot products along the edge of the fuel jet. Planar imaging of OH laser-induced fluorescence reveals a lack of local flame extinction in the high-strain near-burner region for fuel jet Reynolds numbers (Re) less than 20,000, and increasingly common extinction events for higher jet velocities. Planar imaging of soot laser-induced incandescence shows that the soot layers in these flames are relatively thin and are entrained into vortical flow structures in fuel-rich regions inside of the flame sheet.

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“…The presence of soot introduces an additional correlation between soot and temperature. A number of works have focussed on the effect of radiation in turbulent sooting flames, including [46,49,160,183,[190][191][192][193][194][195]. Radiation will not be discussed further here, and the reader may consult the above works for more details.…”

Section: Overview Of the Closure Problem For Soot In Turbulent Flowsmentioning

confidence: 99%

Modelling of Soot Aerosol Dynamics in Turbulent Flow

Rigopoulos

2019

Flow Turbulence Combust

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Aerosol dynamics plays an important role in the modelling of soot formation in combustion processes, as it is responsible for predicting the distribution of size and shape of soot particles. The distribution is required for the correct prediction of the rates of surface processes, such as growth and oxidation, and furthermore it is important on its own because new regulations on particulate emissions require control of the number of smaller particles. Soot formation is strongly dependent on the local chemical composition and thermodynamic conditions and is therefore coupled with fluid dynamics, chemical kinetics and transport phenomena. Comprehensive modelling of soot formation in combustion processes requires coupling of the population balance equation, which is the fundamental equation governing aerosol dynamics, with the equations of fluid dynamics. The presence of turbulence poses an additional challenge, due to the non-linear interactions between fluctuating velocity, temperature, concentrations and soot properties. The purpose of this work is to review the progress made in aerosol dynamics models, their integration with fluid dynamics and the models for addressing the turbulence-soot interaction.

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A hybrid scalar model for sooting turbulent flames

Cited by 29 publications

References 25 publications

Soot properties of laminar jet diffusion flames in microgravity

Soot properties of laminar jet diffusion flames in microgravity

Design of “model-friendly” turbulent non-premixed jet burners for C2+ hydrocarbon fuels

Modelling of Soot Aerosol Dynamics in Turbulent Flow

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