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Search Publications by: Gregory T. Linteris (Fed)

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Displaying 126 - 150 of 196

Suppression of Cup-Burner Flames

September 17, 2003
Author(s)
F Takahashi, Gregory T. Linteris, V Katta
The unsteady suppression process of a laminar methane-air co-flow diffusion flame formed on a cup burner has been studied experimentally and numerically in normal earth gravity. The computation uses a time-dependent direct numerical simulation with

Simulation of Cup-Burner Flames in Microgravity

June 1, 2003
Author(s)
V Katta, F Takahashi, Gregory T. Linteris
The extinction process of cup-burner flames under normal-gravity conditions were previously studied. As the low-speed diffusion flames behave differently in microgravity compared to those on earth, it is important to understand the structureof cup-burner

Extinction Characteristics of Cup-Burner Flame in Microgravity

January 1, 2003
Author(s)
V Katta, F Takahashi, Gregory T. Linteris
Carbon dioxide extinguishes flames through dilution process. The extinction characteristics of CO2 were previously studied using a cup-burner flame under normal-gravity conditions. As the diffusion flames behave differently in microgravity compared to

Numerical Investigations of CO 2 as Fire Suppressing Agent

January 1, 2003
Author(s)
V Katta, F Takahashi, Gregory T. Linteris
Understanding suppression mechanisms of different fire-suppressing agents including CF 3Br (Halon 1301) and inert gases is useful for their efficient use and for developing new agents. Because of the similarities between unsteady jet diffusion flames

Extinction of Cup-Burner Diffusion Flames by Catalytic and Inert Inhibitors

December 1, 2002
Author(s)
Gregory T. Linteris
The first tests of super-effective flame inhibitors blended with CO2 have been performed in methane-air co-flow diffusion flames. Although the organometallic agents used are typically one or two orders of magnitude more effective inhibitors than CF3Br when

Gas-Phase Mechanisms of Fire Retardants

June 28, 2002
Author(s)
Gregory T. Linteris
Fire retardants are added to polymers to increase their ignition time and reduce their heat release rates when burning. They are often described as acting either in the condensed-phase or in the gas-phase, with an understanding that often, both modes can

Effective Non-Toxic Metallic Fire Suppressants. Final Report (NISTIR 6875)

May 1, 2002
Author(s)
Gregory T. Linteris, M D. Rumminger, Valeri I. Babushok, H K. Chelliah, T Lazzarini, P N. Wanigarathne
The purpose of the project was to: a.) identify which metal species would be effective flame inhibitors, and then b.) attempt to find non-toxic forms of the metal which could be used. Very early in the project, however, we determined that metal species-in

Final Report: Effective Non-Toxic Metallic Fire Suppressants

May 1, 2002
Author(s)
Gregory T. Linteris, M D. Rumminger, Valeri I. Babushok, Harsha K. Chelliah, A K. Lazzarini, P N. Wanigarathne
The purpose of the project was to: a.) identify which metal species would be effective flame inhibitors, and then b.) attempt to find non-toxic forms of the metal which could be used. Very early in the project, however, we determined that metal species-in

Inhibition of Premixed Methane Flames by Manganese and Tin Compounds

May 1, 2002
Author(s)
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
The first experimental measurements of influence of manganese- and tin-containing compounds (MMT, TMT) on burning velocity of methane/air flames are presented. Comparisons with Fe(CO) 5 and CF 3Br demonstrate that manganese and tin-containing compounds are

Particle Formation in Laminar Flames Inhibited by Metals

March 1, 2002
Author(s)
Gregory T. Linteris, M D. Rumminger
Some organometallic compounds of iron are two orders of magnitude more effective at volume fraction than CF 3Br in premixed flames, an order of magnitude more effective in counterflow diffusion flames. The condensation of active gas-phase iron-containing

Inhibition of Premixed and Non-Premixed Flames with Fine Droplets of Water and Solutions

January 1, 2002
Author(s)
Harsha K. Chelliah, A K. Lazzarini, P N. Wanigarathne, Gregory T. Linteris
Inhibition/extinction of premixed and non-premixed methane-air flames with fine-droplets of water and solutions containing several chemical agents are investigated experimentally. While solutions allow delivery of much higher concentrations of chemical

Temperature Regions of Optimal Chemical Inhibition of Premixed Flames

January 1, 2002
Author(s)
M D. Rumminger, Valeri I. Babushok, Gregory T. Linteris
Chemically-active fire suppressants may, due to their properties or the means by which they are added to flames, have strong inhibition effects in particular locations in a flame. To study the spatial effects of chemically-active inhibitors, numerical

Physical and Chemical Aspects of Fire Suppression in Extraterrestrial Environments

May 22, 2001
Author(s)
Fumiaki Takahashi, Gregory T. Linteris, Vishwanath R. Katta
A fire, whether in a spacecraft or in occupied spaces on extraterrestrial bases, can lead to mission termination or loss of life. While the fire-safety record of US space missions has been excellent, the advent of longer duration missions to Mars, the moon

Trioxane-Air Counterflow Diffusion Flames in Normal and Microgravity

May 22, 2001
Author(s)
Gregory T. Linteris, M D. Rumminger, D L. Urban
Trioxane, a weakly bound polymer of formaldehyde (C3H6O3, melting point 61 deg C, boiling point 115 deg C), is a uniquely suited compound for studying material flammability. Like many of the more commonly used materials for such tests (e.g. delrin

Premixed Flame Inhibition by Manganese and Tin Compounds

April 24, 2001
Author(s)
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
Flame inhibition data exist for a few metallic compounds (Fe(CO)5, Pb(C2H5)4, CrO2Cl2) which show them to be one or two orders of magnitude more effective than halon 1301 at reducing the burning velocity of premixed methane-air flames. Little burning

Premixed Flame Inhibition by Manganese and Tin Compounds

April 1, 2001
Author(s)
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
In this work we presented the first experimental measurements of influence of manganese- and tin-containing compounds (MMT, TMT0 on burning velocity of methane/air flames. We have also developed kinetic models describing the inhibition mechanisms

Role of Particles in the Inhibition of Premixed Flames by Iron Pentacarbonyl

October 1, 2000
Author(s)
M D. Rumminger, Gregory T. Linteris
Laser light scattering has been used to investigate particle formation in Fe(CO)5-inhibited premixed flames in order to understand the influence of metal and metal oxide condensation on flame inhibition. In premixed CH4-air flames, particles form early in