Results 21 to 30 of about 2,274 (204)

Two-dimensional imaging of soot volume fraction in laminar diffusion flames

Applied Optics, 1999
A technique for acquiring two-dimensional soot-volume-fraction measurements in laminar flames has been demonstrated. The technique provides a map of very low noise concentration over a range of wavelengths (250-1100 nm). A noise level of 0.0007 in extinction and a spatial resolution of 30-40 microm for soot concentration were achieved with an arc lamp ...
Snelling, David, Thomson, Kevin, Smallwood, Gregory, Gulder, O.   +3 more
openaire   +4 more sources

Study on multi-spectral inversion of temperature and soot concentration in flames

Zhongguo Jianchuan Yanjiu, 2019
[Objectives]In order to accurately understand the temperature inside the flame and the distribution of soot concentration,[Methods]the distribution of the two-dimensional temperature and the soot volume fraction inverted from the spectral intensity image
Zhang Qi, Si Mengting, Wang Dongxu, Wang Anzhen, Li Can, Wang Zhen, Luo Zixue, Lou Chun, Cheng Qiang   +8 more
doaj   +1 more source

Numerical Investigation on the Effect of the Oxymethylene Ether-3 (OME3) Blending Ratio in Premixed Sooting Ethylene Flames

Frontiers in Mechanical Engineering, 2021
Synthetic fuels, especially oxygenated fuels, which can be used as blending components, make it possible to modify the emission properties of conventional fossil fuels. Among oxygenated fuels, one promising candidate is oxymethylene ether-3 (OME3).
Robert Schmitz, Mariano Sirignano, Christian Hasse, Federica Ferraro   +3 more
doaj   +1 more source

Soot volume fractions in the overfire region of turbulent diffusion flames [PDF]

Combustion and Flame, 1990
Overfire soot volume fractions and mixture fractions, flame heights, and characteristic flame residence times, were measured for turbulent acetylene, propylene, ethylene and propane diffusion flames burning in still air. Test conditions ranged from highly buoyant pool-like flames to buoyant jet flames, using three burners (with exit diameters of 5, 50,
Sivathanu, Y. R., Faeth, Gerard M.
openaire   +2 more sources

A Mechanochemical Kolbe–Schmitt Reaction: Catechol Carboxylation Provides Building Blocks for Renewable Plasticizers

Angewandte Chemie, EarlyView.
A mechanochemical Kolbe–Schmitt reaction of disodium catecholate enables the synthesis of mono‐ and dicarboxylated catechols at low temperature and CO2 pressure. Directly derivatizing the resulting carboxylic acid and phenolic moieties in the obtained mixture provides plasticizer blends with efficiencies competitive to commercial benchmarks.
Dries De Vos, Victoria S. Pfennig, Arno Goddé, Robby Vroemans, Tobias Krückel, Nicole Marcinkowska, Ettore Bartalucci, Thomas Wiegand, Carsten Bolm, Bert U. W. Maes   +9 more
wiley   +2 more sources

Growth of Soot Volume Fraction and Aggregate Size in 1D Premixed C2H4/Air Flames Studied by Laser-Induced Incandescence and Angle-Dependent Light Scattering

Journal of Combustion, 2018
The growth of soot volume fraction and aggregate size was studied in burner-stabilized premixed C2H4/air flames with equivalence ratios between 2.0 and 2.35 as function of height above the burner using laser-induced incandescence (LII) to measure soot ...
P. N. Langenkamp, J. A. van Oijen, H. B. Levinsky, A. V. Mokhov   +3 more
doaj   +1 more source

Exploring Soot Particle Concentration and Emissivity by Transient Thermocouples Measurements in Laminar Partially Premixed Coflow Flames

Energies, 2017
Soot formation in combustion represents a complex phenomenon that strongly depends on several factors such as pressure, temperature, fuel chemical composition, and the extent of premixing. The effect of partial premixing on soot formation is of relevance
Gianluigi De Falco, Giulia Moggia, Mariano Sirignano, Mario Commodo, Patrizia Minutolo, Andrea D’Anna   +5 more
doaj   +1 more source

Soot volume fraction profiling of asymmetric diffusion flames through tomographic imaging [PDF]

2014 IEEE International Conference on Imaging Systems and Techniques (IST) Proceedings, 2014
This paper presents the 3-D (three-dimensional) reconstruction of soot volume fraction of diffusion flames based on tomographic imaging and image processing techniques. Eight flexible imaging fiber bundles and two RGB (Red, Green and Blue) CCD (Charge-coupled Device) cameras are used to obtain concurrently the 2-D (two-dimensional) image projections of
Hossain, Md. Moinul, Lu, Gang, Yan, Yong
openaire   +1 more source

Measurement of Soot Volume Fraction and Temperature for Oxygen-Enriched Ethylene Combustion Based on Flame Image Processing

Energies, 2017
A method for simultaneously visualizing the two-dimensional distributions of temperature and soot volume fraction in an ethylene flame was presented. A single-color charge-coupled device (CCD) camera was used to capture the flame image in the visible ...
Weijie Yan, Dongmei Chen, Zuomei Yang, Enyu Yan, Peitao Zhao   +4 more
doaj   +1 more source

Ultrafine Particulate Matter in Methane-Air Premixed Flames With Oxygen Enrichment

Frontiers in Mechanical Engineering, 2021
A complementary computational and experimental study is carried out on the formation of ultrafine particulate matter in premixed laminar methane air flames.
Shruthi Dasappa, Shruthi Dasappa, Joaquin Camacho   +2 more
doaj   +1 more source