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Radiation Turbulence Interactions In Pulverized Coal Flames Technical Progress Report Third Year Second Quarter December 15 1995 March 15 1996
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Book Synopsis Radiation Turbulence Interactions in Pulverized Coal Flames. Technical Progress Report, Third Year, Second Quarter, December 15, 1995--March 15, 1996 by :
Download or read book Radiation Turbulence Interactions in Pulverized Coal Flames. Technical Progress Report, Third Year, Second Quarter, December 15, 1995--March 15, 1996 written by and published by . This book was released on 1996 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper, the authors discuss an experimental and theoretical methodology to characterize soot volume fraction fluctuations in turbulent diffusion flames via chaotic maps. The approach is based on the hypothesis that the fluctuations of properties in turbulent flames is deterministic in nature, rather than statistical. To this extent, the authors measured the time series of soot scattering coefficient in an ethylene diffusion flame from light scattering experiments. Following this, corresponding power spectra and delay maps were calculated. It was shown that if the data were averaged, the characteristics of the fluctuations were almost completely washed out. The psds from experiments were successfully modeled using a series of logistic maps.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combustion of Pulverized Coal in Vortex Structures. Quarterly Progress Report No. 8, July 1, 1995--September 30, 1995 by :
Download or read book Combustion of Pulverized Coal in Vortex Structures. Quarterly Progress Report No. 8, July 1, 1995--September 30, 1995 written by and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eighth quarterly report describes the activities and accomplishments of the research team at the University of Oklahoma, Norman, Oklahoma, related to the project entitled {open_quotes}Combustion of Pulverized Coal in Vortex Structures{close_quotes} during the period July 1, 1995 to September 30, 1995. The work performed in this quarter consisted of the following four tasks: (i) Completion of the schlieren flow visualization experiments, (ii) Conducting experiments with particulate laden shear layers in cold flow to measure mean velocity and turbulence intensity field, (iii) Conducting experiments with particulate laden shear layers in heated flow where the initial temperature was above the pyrolysis temperature of the coal, (iii) Conducting experiments with particulate laden shear layers in heated flow where the initial temperature was above the ignition temperature of the coal, and (iv) Revising and preparing the final version of a paper for the Energy Conference to be held in Houston in 1996. A 90-day no-cost extension of the project was obtained. In the final quarter, we plan to complete this work by conducting the final task of measuring concentration fields.
Book Synopsis Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 10, January 1, 1995--March 31, 1995 by :
Download or read book Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 10, January 1, 1995--March 31, 1995 written by and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of ash particles from coal combustion limits it's use as a fuel. On mechanism by which small ash particles are formed is the generation of submicron aerosols through a vaporization/condensation mechanism. Previous work has shown that coal cleaning can lead to increased emissions of aerosols. This research will investigate the means or aerosol formation in coals and the effects that various methods of coal cleaning have on aerosol production, and whether or not cleaning can be performed in a manner that will not lend itself to aerosol formation.
Book Synopsis Investigation of Turbulence?radiation Interactions in Turbulent Flames Using a Hybrid Finite Volume/Monte Carlo Approach by : Anquan Wang
Download or read book Investigation of Turbulence?radiation Interactions in Turbulent Flames Using a Hybrid Finite Volume/Monte Carlo Approach written by Anquan Wang and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 9, October 1, 1994-December 31, 1994 by :
Download or read book Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 9, October 1, 1994-December 31, 1994 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Combustion of Pulverized Coal in Vortex Structures. Quarterly Progress Report No. 7, April 1, 1995--June 30, 1995 by :
Download or read book Combustion of Pulverized Coal in Vortex Structures. Quarterly Progress Report No. 7, April 1, 1995--June 30, 1995 written by and published by . This book was released on 1995 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This seventh quarterly report describes the activities and accomplishments of the research team at the University of Oklahoma, Norman, Oklahoma, related to the project entitled {open_quotes}Combustion of Pulverized Coal in Vortex Structures{close_quotes} during the period April 1, 1995 to June 30, 1995. The work performed in this quarter consisted of the following four tasks: (i) conducting experiments with particulate laden shear layers to measure mean velocity and turbulence intensity field (ii) preparing an abstract for the 1995 UCR contractor's meeting, and a paper for the Energy Conference to be held in Houston in 1996, (iii) participating and presenting a paper UCR meeting in Nashville, Tennessee, (iv) design and installation of devices to traverse the test section while keeping the optics undisturbed, and (v) and design and testing of a natural gas burner system to heat either of the streams to conduct pyrolysis and combustion experiments. In the next quarter, we plan to continue this work with heated shear layers in which particles undergo pyrolysis and combustion. Flow visualization and mean velocity field measurement instrumentation will continue as the major experimental techniques.
Book Synopsis Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 11, April 1, 1995--June 30, 1995 by :
Download or read book Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 11, April 1, 1995--June 30, 1995 written by and published by . This book was released on 1995 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous work has shown that pulverized bituminous coals that were treated by coal cleaning (via froth flotation) or aerodynamic sizing exhibited altered aerosol emission characteristics. Specifically, the emissions of aerosol for the cleaned and sized coals increased by as much as one order of magnitude. The goals of the present program are to: (1) perform measurements on carefully characterized coals to identify the means by which the coal treatment increases aerosol yields; (2) investigate means by which coal cleaning can be done in a way that will not increase aerosol yields; and (3) identify whether this mechanism can be used to reduce aerosol yields from systems burning straight coal. The current experimental series focuses on the use of artificial char to study sodium vaporization and aerosol formation associated with dispersed sodium and mineral inclusions. Artificial char has the advantage over natural coal in that the composition can be precisely controlled, such that the influences of specific mineral composition and content can be investigated. The study showed: the addition of calcite had no effect of the aerosol yield; increased amounts of pyrite did not lead to increased residual ash formation; in spite of the increase in mineral content, the yield of aerosol on the backup filter did not correlate with the amount of added minerals; and the general trend was for reduced aerosol yields as the amount of bentonite increased which suggested that the bentonite was effective at complexing sodium and reducing its overall vaporization.
Book Synopsis Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 6, January 1, 1994--March 31, 1994 by :
Download or read book Suppression of Fine Ash Formation in Pulverized Coal Flames. Quarterly Technical Progress Report No. 6, January 1, 1994--March 31, 1994 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During the present quarter the model was coded and tested on the Illinois coal. Some features of the process need discussion. After devolatilization, the char particle heats towards its steady-state combustion temperature. At approximately 1200--1300 K, the particle quickly goes from a temperature where the equilibrium sodium vapor pressure is negligible to a temperature where it is at one atmosphere. This shows that the sodium vaporization occurs under non-isothermal conditions, although the rapid rate of sodium diffusion relative to particle heating suggests that the quasi steady-state formulation for the sodium vaporization portion of the problem is appropriate. It also illustrates the two-stage release pattern for the sodium: (1) an early rapid release of organically-bound sodium, and (2) a more delayed release of acid-washable sodium, and sodium that was complexed into clay chemicals during the organic sodium vaporization. The conditions reported for the present calculations are as follows: Coal: 8.7% ash, 12% H[sub 2]O, 33.5% volatile matter. Elemental sodium represent 0.82% of the ash. For purposes of calculation, the char particle is presumed to consist of the fixed carbon from the proximate analysis, along with the ash. This establishes the mass fraction of sodium and other minerals in the char at the start of char combustion. For the baseline condition, the char particle was assumed to be 50% covered by attached excluded mineral, and the included mineral matter was assumed to be divided into monodisperse 0.5 [mu]m particles that are evenly dispersed throughout the char. The diameter of the char particle was 25 [mu]m.
Book Synopsis Particulate Processes in Pulverized Coal Flames. Quarterly Technical Progress Report, October-December 1980 by :
Download or read book Particulate Processes in Pulverized Coal Flames. Quarterly Technical Progress Report, October-December 1980 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Major attention has been focused on the design and construction of the experiment. The design of two dilute coal stream reactor heads was completed as was the fabrication of one of the reactor heads. A parametric analysis of furnace design was conducted to allow operating conditions and insulation configurations to be selected to provide an axial temperature drop of less than 200°K/m with a 1-second residence time in the reactor. Final design of the reactor body is in progress. Design of the instrumentation interface with the experiment was initiated. Emphasis has been placed on reactants metering and interface requirements for frontlight and backlight holography. Fabrication of the gas phase reactants metering system is in progress as are exploratory studies of particulate phase metering systems.
Book Synopsis Combustion of Pulverized Coal in Vortex Structures. Quarterly Progress Report No. 6, January 1, 1995--March 31, 1995 by :
Download or read book Combustion of Pulverized Coal in Vortex Structures. Quarterly Progress Report No. 6, January 1, 1995--March 31, 1995 written by and published by . This book was released on 1995 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This sixth quarterly report describes the activities and accomplishments of the research team at the University of Oklahoma, Norman, Oklahoma, related to the project entitled ''Combustion of Pulverized Coal in Vortex Structures'' during the period January 1, 1995 to March 31, 1995. The work performed in this quarter consisted of the following four tasks: (1) design and fabrication of a computer-driven traversing mechanism for traversing LDV transmitter and receiving optics, (2) color schlieren photography, (3) presenting a report in the panel-review meeting in Pittsburgh, (4) installation of additional safety devices in response to the letter of Dr. Sean Plasynski, and (5) streamwise velocity measurement in the isothermal heterogeneous shear layer with nonreacting particles using LDV. In the next quarter, we plan to continue this work with heated shear layers in which particles undergo pyrolysis. Flow visualization and mean velocity field measurement instrumentation will continue as the major experimental techniques.
Book Synopsis Ash & Pulverized Coal Deposition in Combustors & Gasifiers. Quarterly Technical Progress Report, October 1, 1995--December 31, 1995 by :
Download or read book Ash & Pulverized Coal Deposition in Combustors & Gasifiers. Quarterly Technical Progress Report, October 1, 1995--December 31, 1995 written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the period of October 1, 1995 to December 31, 1995, additional progress was made in accomplishing the tasks of the project. In particular, the procedure for analyzing the dispersion of elongated particles was developed. The dispersion of ellipsoidal particles in an isotropic turbulent flow was analyzed. It was shown that the simulation data for the particle fluctuation velocity and diffusivity were in good agreement with the theoretical model predictions. The computational model for simulating particle motions in turbulent duct flows was further developed. The model was applied to the dispersion analysis of particles in a circular duct. Progress was also made in the experimental study of glass fiber transport and deposition in the aerosol wind tunnel.
Book Synopsis 2 años de gobierno al servicio de Nuevo León by :
Download or read book 2 años de gobierno al servicio de Nuevo León written by and published by . This book was released on 1963 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ash and Pulverized Coal Deposition in Combustors and Gasifiers. Quarterly Technical Progress Report, January 1--March 31, 1996 by :
Download or read book Ash and Pulverized Coal Deposition in Combustors and Gasifiers. Quarterly Technical Progress Report, January 1--March 31, 1996 written by and published by . This book was released on 1996 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: During this report period, additional progress was made in accomplishing the tasks of the project. In particular, the computational model for simulating particle motions in turbulent flows was further developed. The model was applied to the dispersion analysis of particles in a circular duct and the transport and deposition of particles in a recirculating region. A model for resuspension of particles from various surfaces in a gas flow is also being developed. The new model accounts for the surface adhesion, as well as the hydrodynamic forces and torques. In addition, the model includes the effect of surface roughness and the structure of near wall turbulent flow. Progress was also made in the experimental study of glass fiber transport and deposition in the aerosol wind tunnel.
Book Synopsis Standard Methods for the Examination of Water and Wastewater by : American Public Health Association
Download or read book Standard Methods for the Examination of Water and Wastewater written by American Public Health Association and published by . This book was released on 1981 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Century of Innovation by : 3M Company
Download or read book A Century of Innovation written by 3M Company and published by 3m Company. This book was released on 2002 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of 3M voices, memories, facts and experiences from the company's first 100 years.
Book Synopsis Bulletin of the Atomic Scientists by :
Download or read book Bulletin of the Atomic Scientists written by and published by . This book was released on 1970-12 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
