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in publisher: "Stanford University. High Temperature Gasdynamics Laboratory."  
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Optical properties of flyash

Description: The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of heat transfer in coal combustion systems, particularly as it is influenced by the presence of inorganic constituents deriving from mineral matter in coal. (VC)
Date: April 1, 1992
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

System study of an MHD/gas turbine combined-cycle baseload power plant. HTGL report No. 134

Description: The MHD/gas turbine combined-cycle system has been designed specifically for applications where the availability of cooling water is very limited. The base case systems which were studied consisted of an MHD plant with a gas turbine bottoming plant, and required no cooling water. The gas turbine plant uses only air as its working fluid and receives its energy input from the MHD exhaust gases by means of metal tube heat exchangers. In addition to the base case systems, vapor cycle variation syst… more
Date: August 1, 1981
Creator: Annen, K.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pulverized coal combustion. Semi-annual report, October 1, 1981-March 31, 1982

Description: A flow tube reactor for the study of the reactivity of pulverized coal under controlled conditions has been developed. The reactor system incorporates optical diagnostics as well as probe sampling techniques to measure the reactivity of coals with differing physical and chemical properties. The aim of the research is to provide fundamental data that can be used in the design and development of coal combustion systems. Two size ranges of pulverized Montana Rosebud and one size of Illinois No. 6 … more
Date: May 1, 1982
Creator: Leslie, I.; Jost, M. & Kruger, C.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pyrite thermochemistry, ash agglomeration, and char fragmentation during pulverized coal combustion

Description: The objective of the present work is to introduce an experimental program that will eventually lead to time-resolved iron ash composition over the technological operating domain. The preceding literature survey suggests two important stipulations on any such experimental program. The first stipulation is that good control must be established over the operating conditions, to accurately quantify their effects. The other is that data must be obtained rapidly, to thoroughly cover the important ope… more
Date: October 1, 1991
Creator: Akan-Etuk, A.; Diaz, R. & Niksa, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The thermophysics of electron beam evaporative sources: Annual report, 21 April 1986-20 April 1987

Description: This report presents work accomplished in preparing equipment for study of evaporative electron beam sources. Faraday cups and x-ray imaging equipment were developed. Due to other commitments, the future of this work is uncertain. (JDH)
Date: June 1, 1987
Creator: Self, S. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optical properties of flyash

Description: The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of radiative heat transfer in coal combustion systems, particularly as its influenced by the presence of inorganic constitutents deriving from the mineral matter in coal.
Date: January 1, 1992
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash

Description: This is the sixteenth quarterly report under DOE contract No. DE-AC22-87PC 79903 entitled Optical Properties of Flyash.'' Tasks 1 and 2 of this program were funded from September 15, 1987. Tasks 3 and 4 were funded from September 15, 1988. The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of radiative heat transfer in coal combustion systems, particularly as it is influenced by the presence of inorganic consti… more
Date: November 1, 1991
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash

Description: The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of radiative heat transfer in coal combustion systems, particularly as it is influenced by the presence of inorganic constituents deriving from the mineral matter in coal. Work is organized under four tasks: Characterization of Flyash: The chemical composition and size distribution of representative flyashes are being measured by appropriate microanalytical tec… more
Date: October 1, 1990
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash

Description: The chemical composition and size distribution of representative flyashes are being measured by appropriate microanalytical techniques to provide information required. Measurements of the infrared optical constants (i.e., the complex refractive index m = n - ik) of synthetic slags are being made as a function of wavelength and temperature for controlled compositions. Particular attention will be given to the contribution of the Fe{sub 2}O{sub 3} content and its valence state. The data is being … more
Date: July 1, 1990
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash

Description: During the past quarter we have successfully measured the near normal reflectance of synthetic slags SA00, SA01, and SA05 at 1600[degree]C. The expected similarity of the measurements for slags SA00 and SA01 (which have nearly the same composition) reinforces our conclusion that the experiment is repeatable, although more data will certainly be taken to ensure this. The Kramers-Kronig relations have been applied to the reflectance data to obtain n in the wavelength range 1--13 [mu]m and k in th… more
Date: January 1, 1990
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash

Description: The purpose of this task is to validate the whole approach adopted in this program. Specifically, this bench-scale experiment is intended to compare the measured optical/radiative properties of a dispersion of well characterized ash with those calculated on the basis of the known size/composition distribution using the correlation formulae relating the composition and complex refractive index resulting from measurements on bulk samples of synthetic slag. Considerable thought has been given to t… more
Date: July 1, 1989
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Combustion of volatile matter during the initial stages of coal combustion

Description: Both the secondary pyrolysis and combustion of the volatiles from a bituminous coal will be studied. Devolatilization and secondary pyrolysis experiments will be conducted in a novel flow reactor in which secondary pyrolysis of the volatiles occurs after devolatilization is complete. This allows unambiguous measurements of the yields from both processes. Measurements will be made for reactor temperatures from 1500 to 1700 K, and a nominal residence time of 200 msec. These conditions are typical… more
Date: August 1, 1990
Creator: Marlow, D.; Niksa, S. & Kruger, C.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High magnetic field MHD generator program. Final report, July 1, 1976-December 31, 1979

Description: A theoretical and experimental program was undertaken to investigate MHD channel phenomena which are important at high magnetic fields. The areas studied were inhomogeneity effects, boundary layers, Hall field breakdown and electrode configuration and current concentrations. In addition, a program was undertaken to study steady-state combustion disk and linear channels in an existing 6 Tesla magnet of small dimensions. The structure of the inhomogeneities in the Stanford M-2 was characterized a… more
Date: April 1, 1980
Creator: Eustis, R. H.; Kruger, C. H.; Mitchner, M.; Self, S. A.; Koester, J. K. & Nakamura, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-magnetic-field MHD-generator program. Quarterly report, January 1, 1981-March 31, 1981

Description: Progress in an experimental and theoretical program designed to investigate MHD channel phenomena which are important at high magnetic fields is reported. The areas of research include nonuniformity effects, boundary layers, Hall field breakdown, the effects of electrode configuration and current concentrations, and studies of steady-state combustion disk and linear channels in an existing 6 Tesla magnet of small dimensions. In the study of the effects of nonuniformities, experiments have been … more
Date: April 1, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spectroscopy and kinetics of combustion gases at high temperatures. Technical progress report, March 1, 1991--October 31, 1992

Description: This program involves two complementary activities: (1) development and application of cw ring dye laser absorption. methods for sensitive detection of radical species and measurement of fundamental spectroscopic parameters at high temperatures; and (2) shock tube studies of radical-molecule and radical-radical reactions relevant to combustion. Species currently under investigation in the spectroscopic portion of the research include NO and CH{sub 3}; this has necessitated the development of a … more
Date: November 1, 1992
Creator: Hanson, R. K. & Bowman, C. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash. Quarterly report, 1 October--31 December 1991

Description: The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of radiative heat transfer in coal combustion systems, particularly as its influenced by the presence of inorganic constitutents deriving from the mineral matter in coal.
Date: January 1, 1992
Creator: Self, S. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spectroscopy and kinetics of combustion gases at high temperatures. Annual progress report 1991

Description: This program involves two complementary activities: (1) development and application of cw ring dye laser absorption methods for sensitive detection of radical species and measurement of fundamental spectroscopic parameters at high temperatures; and (2) shock tube studies of radical-molecule and radical-radical reactions relevant to combustion. Species currently under investigation in the spectroscopic portion of the research include NO and CH{sub 3}; this has necessitated the development of a u… more
Date: December 1, 1991
Creator: Hanson, R. K. & Bowman, C. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Char particle fragmentation and its effect on unburned carbon during pulverized coal combustion. Quarterly report, October 1, 1993--December 31, 1993

Description: The information reported is for the period October I to December 31, 1993. During this quarter, activities were undertaken in Task 2. Oxygen concentrations were measured in the post-flame region of the entrained flow reactor. The sampling probe was used for the hot gas tests to sample the gas stream. Samples were injected into a gas chromatograph to determine the oxygen concentration. Results agreed with thermoequilibrium calculations that yield equilibrium compositions based on the stoichiomet… more
Date: February 1, 1994
Creator: Diaz, R. & Mitchell, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash

Description: In this research program, we have adopted the approach that by measuring fundamental properties (i.e, the complex refractive index, m) of the fly ash which participates in the radiation transfer, we can use well established theoretical principles (Mie theory) to compute the radiative properties of dispersions of fly ash as found in coal combustors. With this approach one can, understand the underlying principles that affect the radiative properties of an ash dispersion and more confidently pred… more
Date: April 1, 1990
Creator: Self, S. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of flyash. Quarterly report, 1 January--31 March 1992

Description: The general aims of this research are to provide a fundamental scientific basis for the physical understanding and reliable calculation of heat transfer in coal combustion systems, particularly as it is influenced by the presence of inorganic constituents deriving from mineral matter in coal. (VC)
Date: April 1, 1992
Creator: Self, S. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pyrite thermochemistry, ash agglomeration, and char fragmentation during pulverized coal combustion. Quarterly report, March 15, 1988--June 15, 1988

Description: The primary topics in this program are the size distribution of particulates from pulverized coal firing and the thermochemical transformations of pyrite at typical p. f. firing conditions. In the laboratory, both of these aspects involve representative sampling of particulates from a high temperature combustor, as well as synthetic model fuels with specified pore structure and pyrite loadings. During the period March 15, 1988 through June 15, 1988 we continued to develop the components for rep… more
Date: August 1, 1988
Creator: Akan-Etuk, A.; Niksa, S. & Kruger, C. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical properties of fly ash. Volume 1, Final report

Description: Research performed under this contract was divided into four tasks under the following headings: Task 1, Characterization of fly ash; Task 2, Measurements of the optical constants of slags; Task 3, Calculations of the radiant properties of fly ash dispersions; and Task 4, Measurements of the radiant properties of fly ash dispersions. Tasks 1 and 4 constituted the Ph.D. research topic of Sarbajit Ghosal, while Tasks 2 and 3 constituted the Ph.D. research topic of Jon Ebert. Together their doctor… more
Date: December 1, 1994
Creator: Self, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spectroscopy and kinetics of combustion gases at high temperatures

Description: This program involves two complementary activities: (1) development and application of cw ring dye laser absorption methods for sensitive detection of radical species and measurement of fundamental spectroscopic parameters at high temperatures; and (2) shock tube studies of radical-molecule and radical-radical reactions relevant to combustion. Species currently under investigation in the spectroscopic portion of the research include NO and CH{sub 3}; this has necessitated the development of a u… more
Date: December 1, 1991
Creator: Hanson, Ronald K. & Bowman, Craig T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spectroscopy and kinetics of combustion gases at high temperatures

Description: This program involves two complementary activities: (1) development and application of cw ring dye laser absorption. methods for sensitive detection of radical species and measurement of fundamental spectroscopic parameters at high temperatures; and (2) shock tube studies of radical-molecule and radical-radical reactions relevant to combustion. Species currently under investigation in the spectroscopic portion of the research include NO and CH[sub 3]; this has necessitated the development of a … more
Date: November 1, 1992
Creator: Hanson, Ronald K. & Bowman, C. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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