FFT method of dynamic light scattering for particle size diagnostics in luminous flames

Ohsawa, T; Kobayashi, E; Ozaki, T

doi:10.1016/0010-2180(83)90012-3

Title: FFT method of dynamic light scattering for particle size diagnostics in luminous flames

Full Record
Other Related Research

Abstract

Time correlation spectroscopy was used to measure the size of luminous particles, in situ, in wick flames and in candle flames containing particle sizes for which little information has been available. The time correlation function of scattered light from the particle in the scattering volume is related to diffusion due to the micro-Brownian motion of the particles. The fluctuation term directly related to the dynamic light scattering was emphasized by improving the observation system. The particle diffusion constants in the luminous area of kerosene lamp and candle flames were about 9-12 x 10 to the -9th and 5-8 x 10 to the -9th sq m/sec, respectively. The particle size estimation can be related to the diffusion constant using kinetic or hydrodynamic relations.

Authors:: Ohsawa, T; Kobayashi, E; Ozaki, T

Publication Date:: Tue Nov 01 00:00:00 EST 1983

Research Org.:: Tokyo Univ. of Agriculture and Tech., Japan

OSTI Identifier:: 7022951

Resource Type:: Journal Article

Journal Name:: Combust. Flame; (United States)

Additional Journal Information:: Journal Volume: 53

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FLAMES; PARTICLE SIZE; DIFFUSION; EMISSION SPECTROSCOPY; FOURIER TRANSFORMATION; LASER SPECTROSCOPY; LIGHT SCATTERING; SOOT; INTEGRAL TRANSFORMATIONS; SCATTERING; SIZE; SPECTROSCOPY; TRANSFORMATIONS; 400800* - Combustion, Pyrolysis, & High-Temperature Chemistry

Citation Formats


                    Ohsawa, T, Kobayashi, E, and Ozaki, T. FFT method of dynamic light scattering for particle size diagnostics in luminous flames.  United States: N. p., 1983. 
        Web.  doi:10.1016/0010-2180(83)90012-3.

Copy to clipboard


                    Ohsawa, T, Kobayashi, E, & Ozaki, T. FFT method of dynamic light scattering for particle size diagnostics in luminous flames.  United States.  https://doi.org/10.1016/0010-2180(83)90012-3

Copy to clipboard


                    Ohsawa, T, Kobayashi, E, and Ozaki, T. 1983.  
        "FFT method of dynamic light scattering for particle size diagnostics in luminous flames".  United States.  https://doi.org/10.1016/0010-2180(83)90012-3.

Copy to clipboard


                    
@article{osti_7022951,

  title        = {FFT method of dynamic light scattering for particle size diagnostics in luminous flames},

  author       = {Ohsawa, T and Kobayashi, E and Ozaki, T},

  abstractNote = {Time correlation spectroscopy was used to measure the size of luminous particles, in situ, in wick flames and in candle flames containing particle sizes for which little information has been available. The time correlation function of scattered light from the particle in the scattering volume is related to diffusion due to the micro-Brownian motion of the particles. The fluctuation term directly related to the dynamic light scattering was emphasized by improving the observation system. The particle diffusion constants in the luminous area of kerosene lamp and candle flames were about 9-12 x 10 to the -9th and 5-8 x 10 to the -9th sq m/sec, respectively. The particle size estimation can be related to the diffusion constant using kinetic or hydrodynamic relations.},

  doi          = {10.1016/0010-2180(83)90012-3},

  url          = {https://www.osti.gov/biblio/7022951},
  journal      = {Combust. Flame; (United States)},
number       = ,

  volume       = 53,

  place        = {United States},

  year         = {Tue Nov 01 00:00:00 EST 1983},

  month        = {Tue Nov 01 00:00:00 EST 1983}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1016/0010-2180(83)90012-3

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Diffusion flame studies of the chemical and physical mechanisms of soot formation from aromatic and substituted aromatic fuels. Progress report, February 15, 1981-February 15, 1982

Technical Report Lester, T; Merklin, J; Sorensen, C

The development of photon correlation spectroscopy (PCS) as a soot particle size measurement in flames has been pursued. Using both slot diffusion flames doped with benzene and a wick diffusion flame burning kerosene, soot size distributions have been determined as a function of height above the base of the flame. Of particular interest has been the correct relationship between the particle diffusion coefficient and the particle diameter. Effort has also been expanded in extraction of the higher moments of the size distribution from the scattered light spectra. Papers covering this year's activities have been published in Applied Optics and acceptedmore »« less
In situ measurements of oxide particles in boron-containing diffusion flames

Journal Article Turns, S; Funari, M; Khan, A - Combust. Flame; (United States)

Particulate matter in axisymmetric laminar diffusion flames produced by burning mixtures of either CO and trimethylborate (TMB) or CH/sub 4/ and TMB with air were investigated using laser light-scattering techniques. Boron oxide particle sizes and number densities were determined at various heights in the flames using polarization ratio and relative intensity measurements, respectively. In the CO/TMB flames, two distinct particle-laden regions were found. The first region was located on the rich side of the luminous flame zone and initially appeared as a narrow annulus, which grew in width downstream until the particles filled the core. A second thin annular zonemore »« less
https://doi.org/10.1016/0010-2180(89)90096-5
Quantitative analysis of in situ optical diagnostics for inferring particle/aggregate parameters in flames: Implications for soot surface growth and total emissivity

Journal Article Koeylue, U - Combustion and Flame

An in situ particulate diagnostic/analysis technique is outlined based on the Rayleigh-Debye-Gans polydisperse fractal aggregate (RDG/PFA) scattering interpretation of absolute angular light scattering and extinction measurements. Using proper particle refractive index, the proposed data analysis method can quantitatively yield all aggregate parameters (particle volume fraction, f{sub v}, fractal dimension, D{sub f}, primary particle diameter, d{sub p}, particle number density, n{sub p}, and aggregate size distribution, pdf(N)) without any prior knowledge about the particle-laden environment. The present optical diagnostic/interpretation technique was applied to two different soot-containing laminar and turbulent ethylene/air nonpremixed flames in order to assess its reliability. The aggregate interpretationmore »« less
https://doi.org/10.1016/S0010-2180(96)00179-4
Diffusion flame studies of the chemical and physical mechanisms of soot formation from aromatic and substituted aromatic fuels. Progress report, July 15, 1980-February 15, 1981

Technical Report Lester, T; Merklin, J; Sorensen, C

The opposed co-axial diffusion flame burners have been constructed and preliminary experiments have been conducted, using CO, CH/sub 4/ and hydrogen as fuels. The opposed burners are mounted vertically and can be moved independently or in tandem in the vertical direction and can be moved horizontally to facilitate spatial probing, both optical and chemical. Preliminary flame temperature measurements indicate the temperature can be varied by at least 500/sup 0/K by varying the fuel flowrate and the fuel oxidizer/diluent ratio. A flow regulation system employing critical orifices has been constructed to provide accurate monitoring of the fuel, oxidizer and diluent gases.more »« less
Diffusion-flame studies of the chemical and physical mechanisms of soot formation from aromatic and substituted-aromatic fuels. Progress report, February 16, 1982-February 15, 1983

Technical Report Lester, T; Merklin, J; Sorensen, C

Effort this reporting period has been concentrated on the measurement of the diffusion constants of soot aerosols in both laminar premixed and diffusion flames and on preliminary analysis of the influence of the presence of cyclohexane on the decomposition of and soot formation from benzene. The diffusion coefficients of aerosol particles in the intermediate Knudsen number regime have been measured with the use of the dynamic light-scattering technique Photon Correlation Spectroscopy. The experimental values, obtained in flame generated aerosols as well as polystyrene microsphere aerosols, are compared to the diffusion coefficients theoretically predicted. It is found that these simple theoriesmore »« less

Similar Records