Results 261 to 270 of about 53,514 (295)

Concentration and mass distribution of charged species in sooting flames

Symposium (International) on Combustion, 1975
Total concentration and mass distribution of charged species larger than about 300 amu were measured along the centerline of a premixed sooting acetylene/oxygen flat flame at 20 mmHg. Charge concentration was determined by measuring the electric current delivered to a Faraday cage in the detection chamber of a staged molecular beam flame sampling ...
B.L. Wersborg, A.C. Yeung, J.B. Howard
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Diffuse-light two-dimensional line-of-sight attenuation for soot concentration measurements

Applied Optics, 2008
A technique of diffuse-light two-dimensional line-of-sight attenuation (diffuse 2D-LOSA) is described and demonstrated that achieves very high levels of sensitivity in transmissivity measurements (optical thicknesses down to 0.001) while effectively mitigating interferences due to beam steering.
Kevin A, Thomson, Matthew R, Johnson, David R, Snelling, Gregory J, Smallwood   +3 more
openaire   +2 more sources

Concentration and Temperature Effects on Soot Formation in Diffusion Flames

1994
The effects of fuel dilution on soot formation in laminar diffusion flames is investigated. The lower soot formation rate observed is due to a combination of concentration, temperature and residence time effects. Based on local measurements of the temperature, temperature seems to be the most important effect.
Robert J. Santoro, Thomas F. Richardson
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Pcdd/F-concentrations in chimney soot from house heating systems

Chemosphere, 1988
Abstract 50 different chimney soot samples from house heating in the area of Bayreuth, Germany, were analyzed for PCDD/F. The furnaces operated with wood, coal, wood/coal or oil. PCDD/F were detected in all samples and their isomer patterns were similar to those from municipal waste incinerators.
openaire   +1 more source

Influence of Soot Agglomerate Morphology on Radiative Properties in Concentration Detection

2014 Fourth International Conference on Instrumentation and Measurement, Computer, Communication and Control, 2014
Solar radiation is strongly absorbed by soot aggregate. And the atmospheric radiative properties will be affected by the change of aggregate morphology. Based on fractal theory, the morphological properties of soot aggregates are studied using the cluster-cluster aggregation (CCA) model. The superposition Tmatrix method is employed to perform extensive
Jinying Yin, Hongyan Yang, Siqi Zhang, Yong Qin, Zhen Zhou   +4 more
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Concurrent measurements of temperature and soot concentration of pulverised coal flames

IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188), 2002
This paper presents a novel instrumentation system for the concurrent measurements of temperature and soot concentration of pulverised coal flames. The system operates on the two-colour principle combining advanced optical sensing and digital image processing techniques. The temperature of a flame is calculated from the ratio between the grey-levels of
G. Lu, H.C. Bheemul, Y. Yan
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Real-Time Soot Concentration Measurement Technique for Engine Exhaust Streams

SAE Technical Paper Series, 1993
<div class="htmlview paragraph">A new real-time soot concentration measurement technique for engine exhaust flows is presented. The technique uses a pulsed laser to illuminate the soot particles, with subsequent detection of the incandescence from the particles.
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Determination of NOX and Soot Concentrations Using a Multi-wavelength Opacimeter

2016
A novel approach to measure both the particle and the NO2 concentration in the exhaust of diesel engines during the roadworthiness test in the periodical technical inspection is presented. It is based on a multi-wavelength extinction measurement and a mathematical inversion algorithm to obtain the concentrations from the extinction readings.
H. Axmann, A. Bergmann, B. Eichberger
openaire   +1 more source

Current and historical soot particle concentrations in the Vienna urban aerosol

2020
The light absorbing fraction of carbonaceous aerosols is divided into particles absorbing light equally at all wavelengths (black carbon, BC) and particles which predominantly absorb light at shorter wavelengths (brown carbon, BrC). Especially in an urban environment, these carbonaceous aerosol species can be attributed to different sources: BC tends ...
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Continuous measurement of soot concentration in diesel exhaust

Journal of Aerosol Science, 1989
A. Krasenbrink, B. Georgi
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