Author: C. R. ShaddixPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Laser Measurements of Soot and CO Production in Time-Varying, Hydrocarbon Diffusion Flames
Author: C. R. ShaddixLaser Imaging of Chemistry-flowfield Interactions
Author: Joel E. HarringtonPublisher:
ISBN:
Category : Flame
Languages : en
Pages : 14
Book Description
Models of detailed flame chemistry and soot formation are based upon experimental results obtained in steady, laminar flames. For successful application of these descriptions to turbulent combustion, it is instructive to test predictions against measurements in time-varying flowfields. This paper reports the use of optical methods to examine soot production and oxidation processes in a co-flowing, axisymmetric CH(4)/air diffusion flame in which the fuel flow rate is acoustically forced to create a time-varying flowfield. For a particular forcing condition in which tip clipping occurs (0.75 V loudspeaker excitation), elastic scattering of vertically polarized light from the soot particles increases by nearly an order of magnitude with respect to that observed for a steady flame with the same mean fuel flow rate. The visible flame luminosity and laser-induced fluorescence attributed to polycyclic aromatic hydrocarbons (PAH) are also enhanced. Peak soot volume fractions, as measured by time-resolved laser extinction/tomography at 632.8 and 454.5 mm and calibrated laser-induced incandescence (LII), show a factor of 4-5 enhancement in this flickering flame. The LII method is found to track the soot volume fraction closely and to give better signal-to-noise than the extinction measurements in both the steady and time-varying flowfields. A Mie analysis suggests that most of the enhanced soot production results from the formation of larger particles in the time-varying flowfield.
NIST Building & Fire Research Laboratory Publications
Author: Building and Fire Research Laboratory Publications
Author: Building and Fire Research Laboratory (U.S.)Publisher:
ISBN:
Category : Building
Languages : en
Pages : 138
Book Description
Publications of the National Institute of Standards and Technology ... Catalog
Author: National Institute of Standards and Technology (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 1162
Book Description
Projects 1993
Author: Noel J. RaufastePublisher:
ISBN:
Category : Building
Languages : en
Pages : 136
Book Description
Laser Diagnostics of Soot in Hydrocarbon Diffusion Flames
Author: Bo TianSoot Formation in Combustion
Author: Henning BockhornPublisher: Springer Science & Business Media
ISBN: 3642851673
Category : Science
Languages : en
Pages : 595
Book Description
Soot Formation in Combustion represents an up-to-date overview. The contributions trace back to the 1991 Heidelberg symposium entitled "Mechanism and Models of Soot Formation" and have all been reedited by Prof. Bockhorn in close contact with the original authors. The book gives an easy introduction to the field for newcomers, and provides detailed treatments for the specialists. The following list of contents illustrates the topics under review:
Laser-induced Incandescence Measurements of Soot Production in Steady and Flickering Methane, Propane, and Ethylene Diffusion Flames
Author: Christopher R. ShaddixPublisher:
ISBN:
Category :
Languages : en
Pages : 35
Book Description
Author: Guozheng Lin