Results 251 to 260 of about 53,514 (295)

Concentration profiles in rich and sooting ethylene flames

Symposium (International) on Combustion, 1988
Detailed temperature and species profiles in two premixed ethylene flames, one heavily sooting and the other rich but non-sooting, were studied with probes, laser fluorescence and a chemical kinetics model We found that the oxidation reactions leading to CO, H 2 O and CO 2 can be well modeled.
Stephen J. Harris, Weiner Anita M., Richard J. Blint, J.E.M. Goldsmith   +3 more
openaire   +1 more source

A light-scattering method for soot concentration measurements

Combustion and Flame, 1970
The validity of light-scatter measurements as a basis for determining soot particle size and concentration from point to point within a flame has been examined in relation to measurements on a special propane burner. The monodisperse spherical particle model relied on in the past was found to predict scatter diagrams in poorer agreement with experiment
W.H. Dalzell, G.C. Williams, H.C. Hottel
openaire   +1 more source

The Effect of Oxygen Concentration on Sooting Diffusion Flames

Combustion Science and Technology, 1980
Abstract In a concentric diffusion flame arrangement, sooting heights were determined as a function of the oxygen concentration in the oxidizing stream. Changing the oxygen concentration has two different and competing effects on the tendency of a fuel jet to soot. Increasing the oxygen concentration increases the stoichiometric flame temperature which
null GLASSMAN, P. YACCARINO
openaire   +1 more source

Soot concentration field of turbulent propane/air diffusion flames

Symposium (International) on Combustion, 1977
A systematic study has been made of soot concentration in free turbulent propane/air diffusion flames. Sampling probes and a lightscatter technique were used; the latter also allowed detection of soot concentration fluctuations. The relative intensity of the fluctuations is very high, while the integral spatial scale is rather small.
H.A. Becker, S. Yamazaki
openaire   +1 more source

Ambient air soot concentrations in Munich public transportation systems

Science of The Total Environment, 1997
Airborne soot concentrations in fine dust up to 10 μm mean particle diameter were measured in seven buses and tramways during regular rides in 4 h periods at different daytimes in Munich. With regard to the traffic-related measurements, the main part of particle emissions is caused by motor vehicles.
M. Zielinski, H. Römmelt, G. Fruhmann
openaire   +1 more source

Soot Concentration and Velocity Measurement in an Acoustic Burner

41st Aerospace Sciences Meeting and Exhibit, 2003
Laser Induced Incandescence (LII) and Particle Vaporization Velocimetry (PVV) were used to measure soot concentration and velocity in an acoustically excited combustion chamber. This acoustic burner provides a controllable environment for the study of soot formation and destruction in an unsteady flow relevant to turbulent combustion.
Ping Yang, Jerry Seitzman
openaire   +1 more source

Soot load versus aromatic concentration in diesel oil premixed flames

Fuel, 2001
Soot production of diesel oil, characterised by a well-defined aromatic content, was investigated in rich premixed flames by laser extinction technique. By analysing the soot plume, a criterion to assign a ranking in sooting tendency was found, based on the connection between the maximum soot volume fraction detected along the flame axis, fvM, and the ...
Cignoli F, De Iuliis S, Zizak G
openaire   +3 more sources

In-cylinder Quantitative Soot Concentration Measurement By Laser-Induced Incandescence

SAE Technical Paper Series, 1999
<div class="htmlview paragraph">Some methods to quantify the soot concentration by Laser-Induced Incandescence were developed using a flat flame burner in our previous work [<span class="xref">1</span>]. Those methods take the following points into consideration.
Kazuhisa Inagaki, Semon Takasu, Kiyomi Nakakita   +2 more
openaire   +1 more source

Soot concentration and absorption coefficient in a low-pressure flame

Combustion and Flame, 1975
Abstract Soot concentrations at different positions through the carbon formation zone of a premixed acetylene/oxygen flat flame at 20-mm Hg were evaluated by measuring the attenuation of a laser beam passed through the flame. The required soot absorption coefficients were measured in the same optical system by replacing the flame with standard soot ...
B.L. Wersborg, L.K. Fox, J.B. Howard
openaire   +1 more source

Preferential diffusion and concentration modification in sooting counterflow diffusion flames

Symposium (International) on Combustion, 1989
An experimental investigation has been conducted on the influence of the mobility of inert additives on soot formation in propane and ethylene counterflow diffusion flames. Inerts used were helium, neon, argon, or krypton, and the results show that while the mobility of the inert has practically no effect when a small amount of inert is added to the ...
R.L. Axelbaum, C.K. Law, W.L. Flower
openaire   +1 more source