Modelling soot formation in a laminar diffusion flame burning a surrogate kerosene fuel

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

doi:10.1016/j.proci.2006.07.016

Cited by 47 publications

(19 citation statements)

References 13 publications

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“…[29] in axisymmetric laminar diffusion flames fueled by C 1 -C 3 hydrocarbons, except for the pre-exponential factor for surface growth that was scaled here by a factor of 1.3 to match the soot production of LDPE. This scaling strategy is similar to that proposed by Moss and Aksit [30]. The parameters related to soot formation processes are reported in Table 2.…”

Section: Soot Modelmentioning

confidence: 69%

Soot Production and Radiative Heat Transfer in Opposed Flame Spread over a Polyethylene Insulated Wire in Microgravity

et al. 2019

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This shows that the convective heat transfer from the flame is the main contribution to sustain the pyrolysis process and the flame spread is mainly ensured owing to the combined contribution of convection from flame and conduction inside the condensed phase. The maximum incident radiative flux along the molten ball is 17.5 kW/ m 2 and is reached at the molten ball trailing edge whereas the radiant fraction is about 0.25. Neglecting flame self-absorption affects these values by less than 5%, showing that the optically-thin approximation is valid for this flame. In addition, soot radiation dominates the radiative heat transfer in this flame, contributing for about two-third of the total radiation. Finally, model results show that the usuallyused thermally-thin assumption throughout the LDPE coating is not strictly valid.

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Section: Soot Modelmentioning

confidence: 69%

Soot Production and Radiative Heat Transfer in Opposed Flame Spread over a Polyethylene Insulated Wire in Microgravity

et al. 2019

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“…The sooting tendency of liquid fuels under various conditions has been the topic of a number of studies. Fundamental investigations on fossil fuel surrogates as well as on biodiesel surrogates have been performed both in shock tubes [11,12], premixed [13,14], and diffusion flames [15][16][17]. The studies of soot formation in diesel flames are limited; recent investigations, including the work of Solero [18] and Lemaire et al [2,19], employed an atomizer to produce a fuel spray for direct vaporization of the fuel in the flame itself.…”

Section: Soot Characterization For Liquid Fuelsmentioning

confidence: 99%

Investigation of Soot Formation in a Novel Diesel Fuel Burner

et al. 2019

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In the present work, a novel burner capable of complete pre-vaporization and stationary combustion of diesel fuel in a laminar diffusion flame has been developed to investigate the effect of the chemical composition of diesel fuel on soot formation. For the characterization of soot formation during diesel combustion we performed a comprehensive morphological characterization of the soot and determined its concentration by coupling elastic light scattering (ELS) and laser-induced incandescence (LII) measurements. With ELS, radii of gyration of aggregates were measured within a point-wise measurement volume, LII was employed in an imaging approach for a 2D-analysis of the soot volume fraction. We carried out LII and ELS measurements at different positions in the flame for two different fuel types, revealing the effects of small modifications of the fuel composition on soot emission during diesel combustion.

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“…Modern soot models cover a range from simple phenomenological models to sectional approaches, which is one of the most detailed soot modelling approaches available today. Unfortunately, phenomenological soot models at low computational cost often lack in general applicability and accuracy [16][17][18]. Modern numerical approaches with detailed gas phase chemistry, however, struggle with computational costs for technical applications, and are generally limited to rather simple test cases like laminar flames [8][9][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental characterization and numerical simulation of a sooting lifted turbulent jet diffusion flame

Köhler

Geigle

Blacha

et al. 2012

Combustion and Flame

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A sooting C 2 H 4 /air jet diffusion flame was investigated experimentally by laser measuring techniques and the results are compared to CFD calculations. The target flame (C 2 H 4 10.4 g/min, bulk exit velocity 44 m/s, RE = 10000) exhibits well-defined boundary conditions and presents a good test case for model validation. Flow velocity, temperature and soot volume fraction in this flame has been measured previously. In this paper, further experimental results from Raman scattering and laser-induced fluorescence (LIF) measurements are presented to expand the validation data base. Raman scattering is used to measure the fuel/air mixing prior to combustion, while LIF of PAHs monitors the soot precursor region and successive planar OH-LIF serves to map the flame front position and its statistics. Furthermore, a numerical simulation of this flame was performed based on the DLR in-house code THETA. Within the scope of the test case presented here, the code combines a relatively detailed description of the gas phase kinetics coupled with a detailed yet computation-efficient soot model, suitable for CFD applications. This model has been designed to predict soot for a variety of fuels and flames with good accuracy at relatively low computational costs. Universal model parameters are applied, which requires no tuning for the dependence of test case or fuel. The experimental and numerical results are compared and discussed with special emphasis on the pre-flame region of the jet and up to the downstream position where significant soot concentrations are present. Validation shows the general applicability of the CFD code with implemented soot model to rather complex systems like the target sooting turbulent jet flame. Identified discrepancies are analyzed and can be explained, while opening up the field for future optimization of parts of the CFD code.

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Modelling soot formation in a laminar diffusion flame burning a surrogate kerosene fuel

Cited by 47 publications

References 13 publications

Soot Production and Radiative Heat Transfer in Opposed Flame Spread over a Polyethylene Insulated Wire in Microgravity

Soot Production and Radiative Heat Transfer in Opposed Flame Spread over a Polyethylene Insulated Wire in Microgravity

Investigation of Soot Formation in a Novel Diesel Fuel Burner

Experimental characterization and numerical simulation of a sooting lifted turbulent jet diffusion flame

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