Two-dimensional soot distributions in buoyant turbulent fires

Xin, Yibing; Gore, Jay P.

doi:10.1016/j.proci.2004.08.126

Cited by 65 publications

(37 citation statements)

References 20 publications

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“…Shaddix et al [9,10] exploited these combined measurements to produce a popular database of quantitative soot measurements in laminar hydrocarbon diffusion flames. The same technique was also applied by other researchers in the investigations of various flames, such as laminar diffusion flames [11][12][13], laminar premixed flames [14][15][16] and turbulent diffusion flames [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

High spatial resolution laser cavity extinction and laser-induced incandescence in low-soot-producing flames

et al. 2015

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Accurate measurement techniques for in situ determination of soot are necessary to understand and monitor the process of soot particle production. One of these techniques is line-of-sight extinction, which is a fast, low-cost and quantitative method to investigate the soot volume fraction in flames. However, the extinction-based technique suffers from relatively high measurement uncertainty due to low signal-to-noise ratio, as the single-pass attenuation of the laser beam intensity is often insufficient. Multi-pass techniques can increase the sensitivity, but may suffer from low spatial resolution. To overcome this problem, we have developed a high spatial resolution laser cavity extinction technique to measure the soot volume fraction from low-soot-producing flames. A laser beam cavity is realised by placing two partially reflective concave mirrors on either side of the laminar diffusion flame under investigation. This configuration makes the beam convergent inside the cavity, allowing a spatial resolution within 200 μm, whilst increasing the absorption by an order of magnitude. Three different hydrocarbon fuels are tested: methane, propane and ethylene. The measurements of soot distribution across the flame show good agreement with results using laser-induced incandescence (LII) in the range from around 20 ppb to 15 ppm.

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Section: Introductionmentioning

confidence: 99%

High spatial resolution laser cavity extinction and laser-induced incandescence in low-soot-producing flames

et al. 2015

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“…Simultaneous measurements of soot and OH [10] or soot and flow velocity [11] provide interesting relations between soot concentration, flame front location and particle residence time, respectively. Such low frame rate measurements do not convey crucial information on soot evolution, which is characterized by strong intermittency and dynamical features [12].…”

Section: Introductionmentioning

confidence: 99%

Time-resolved spatial patterns and interactions of soot, PAH and OH in a turbulent diffusion flame

Franzelli

Scouflaire

Candel

2015

Proceedings of the Combustion Institute

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Soot control raises important fundamental issues and industrial challenges, which require a comprehensive understanding of processes governing its formation, interactions and destruction in turbulent flames. A physical insight of the soot space-time evolution in a turbulent diffusion flame is reported in this article by combining three simultaneous high sampling rate imaging diagnostics operating at a frame rate of 10 kHz: light scattering from soot particles, planar

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“…This model parameter describes the momentum/scalar interactions in the flow. The modeling difficulty associated with this parameter is highlighted by the wide range of values from the literature shown in Table 4 [51][52][53][54]. Xin et al [51] used an Sc t value of 0.4 in the simulation of a methane pool fire and stated that Sc t did not have a significant influence on simulation output.…”

Section: Determine I/u Mapmentioning

confidence: 99%

Application of a Verification, Validation and Uncertainty Quantification Framework to a Turbulent Buoyant Helium Plume

Jatale

Smith

Thornock

et al. 2015

Flow Turbulence Combust

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A framework for verification and validation/uncertainty quantification of largescale, highly coupled, complex processes is presented. Steps in the framework include code and solution verification, development of an input/uncertainty map, definition of evaluation criteria, development of a surrogate model, performance of a consistency analysis (a mathematical statement limiting error), and the feed forward and feedback of information gain from the analysis. This framework is applied to a turbulent, buoyant, 1 m diameter helium plume. Experimental measurements are obtained from Sandia National Laboratory while the helium plume simulations are performed using Large Eddy Simulation. Both parameter and experimental uncertainty associated with the helium plume are reduced by requiring consistency.

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Two-dimensional soot distributions in buoyant turbulent fires

Cited by 65 publications

References 20 publications

High spatial resolution laser cavity extinction and laser-induced incandescence in low-soot-producing flames

High spatial resolution laser cavity extinction and laser-induced incandescence in low-soot-producing flames

Time-resolved spatial patterns and interactions of soot, PAH and OH in a turbulent diffusion flame

Application of a Verification, Validation and Uncertainty Quantification Framework to a Turbulent Buoyant Helium Plume

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