| Fundamentals of Soot Formation in Gas Turbine Combustors |
14 FEB 2001 |
18 pages |
| Authors:
Meredith B. Colket; Robert J. Hall; David Liscinsky; Mitchell D. Smooke; UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT
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 | In this three year effort particle extraction methods were evaluated for collecting scoot particulates from sooting flames and significant enhancements to the models for physics of soot formation were developed. Through comparisons to the URTC data as well as data obtained separately at Yale University, the models provided a reasonable simulation of physical phenomena related to soot production in flames. Four different techniques for characterizing soot were evaluated and compared ... |
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| Fundamentals of Soot Formation in Gas Turbine Combustors |
31 AUG 1998 |
78 pages |
| Authors:
Meredith B. Colket Iii.; Robert J. Hall; David S. Liscinsky; Mitchell D. Smooke; UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT
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| An experimental facility for studying soot formation in high temperature, fuel-rich, laminar, premixed flames has been constructed. Diagnostics included laser absorption, thermocouple particle densitometry, and thermophoretic soot sampling with analysis by transmission electron microscopy. Single particles with diameters as small as 3-5 nanometers were observed. Larger particles (20-25 nanometers) agglomerated to form large clusters. A coflow, axisymmetric, laminar ethylene diffusion flame has been studied, both ... |
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| Mechanisms Controlling Soot Formation in Diffusion Flames |
29 SEP 97 |
94 pages |
| Authors:
Meredith B. Colket III; Robert J. Hall; Mitchell D. Smooke; UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT
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| Arclength continuation methods were incorporated into a code for predicting the structure of sooting, opposed-jet flames. The code includes complex chemistry, detailed particle dynamics, particle chemistry and radiation. The code was used to predict soot production over a wide variation in strain rates for both ethylene/air and methane/air diffusion flames. Predicted values (both peak and spatial distributions) agree well with experimental measurements in ethylene flames. Particle size distributions are also ... |
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| Mechanistic Models of Soot Formation |
20 JUL 94 |
117 pages |
| Authors:
Merideth B. Colket III; Robert J. Hall; Mitchell D. Smooke; UNITED TECHNOLOGIES RESEARCH CENTER EAST HARTFORD CT
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| A detailed chemical kinetic mechanism for the pyrolysis of toluene and the formation of polyaromatic hydrocarbons has been developed. This chemical kinetic model is consistent with shock tube data with mass spectral identification of intermediate species. This kinetic analysis provides a better understanding of how aromatic rings decompose and how polyaromatic species grow. In addition, a previously developed soot formation code, based on a sectional aerosol model for predicting soot ... |
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| Modification and Improvement of Software for Modeling Multidimensional Reacting Fuel Flows |
JUL 89 |
97 pages |
| Authors:
David E. Keyes; Dennis J. Philbin; Mitchell D. Smooke; SCIENTIFIC COMPUTING ASSOCIATES INC NEW HAVEN CT
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| The flame type of most practical combustion devices is the diffusion flame. THese flames are important in the interaction of heat and mass transfer with chemical reactions in ramjets, jet turbines and commercial burners. Three- dimensional models that couple the effects of fluid flow with detailed chemical reaction are as yet computationally infeasible. We focus our attention on axisymmetric laminar and turbulent diffusion flames in which a cylindrical fuel stream ... |
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| Analysis of a Parallelized Nonlinear Elliptic Boundary Value Problem Solver with Application to Reacting Flows |
APR 87 |
29 pages |
| Authors:
David E. Keyes; Mitchell D. Smooke; INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA
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| A parallelized finite difference code based on Newton's method for systems of non-linear elliptic boundary value problems in two dimensions is analyzed in terms of computational complexity and parallel efficiency. An approximate cost function depending on 15 dimensionless parameters (including discrete problem dimensions, convergence parameters, and machine characteristics) is derived for algorithms based on stripwise and boxwise decompositions of the domain and a 1:1 assignment of the strip or box ... |
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| Adaptive Gridding for Finite Difference Solutions to Heat and Mass Transfer Problems, |
1982 |
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| Authors:
Harry A. Dwyer; Mitchell D. Smooke; Robert J. Kee; CALIFORNIA UNIV DAVIS DEPT OF MECHANICAL ENGINEERING
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 | The authors' purpose in writing this paper is to review some of their recent work in the calculation of optimal meshes for the solution of parabolic and elliptic partial differential equations (PDE). They first explain our strategies for the adaptive placement of mesh points. In addition, they make some speculation as to promising avenues for future research in mesh adaptation. Finally, they discuss examples of the application of adaptive gridding ... |
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