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Search Publications by: Gregory T. Linteris (Fed)

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Displaying 76 - 100 of 196

Prediction of the mass loss rate of polymer materials: Impact of residue formation

April 21, 2012
Author(s)
Gregory T. Linteris, Bernhard Schartel, Florian Kempel, Stanislav Stoliarov, Richard E. Lyon, Richard N. Walters, Anja Hofmann
Two different numerical simulation tools, Fire Dynamic Simulator (FDS) and ThermaKin, are investigated with respect to their capability to predict the mass loss rate of polymer materials exposed to different fires. For validation, gasification apparatus

Annual Report to Sponsor: Understanding Unwanted Combustion Enhancement by Potential Halon Replacements

February 3, 2012
Author(s)
Gregory T. Linteris, Jeffrey A. Manion, Donald R. Burgess Jr., Iftikhar A. Awan, Peter B. Sunderland, John L. Pagliaro
This year, we continued work to numerically model the behavior of the Halon replacements in the FAA Aerosol Can Test (FAA-ACT) to understand why they are causing more overpressure rather than flame extinction. The goal is to understand the process to

Effects of Fire Suppressants on Ignition Characteristics of Propane-Air Mixtures

December 6, 2011
Author(s)
Gregory T. Linteris, Viswanath R. Katta, Fumiaki Takahashi, Harsha K. Chelliah, Oliver Meier
A numerical investigation is performed for understanding the ignition behaviors of CF3Br and R- 125 fire-suppressing agents in propane-air-agent mixtures. Two types of simulations are considered in an attempt to provide insight into the FAA’s Aerosol Can

Stirred-Reactor Simulations of Enhanced Reaction in the Presence of Fire Suppressants

October 12, 2011
Author(s)
Gregory T. Linteris, Donald R. Burgess Jr., Fumiaki Takahashi, Viswanath R. Katta, Oliver Meier
Several agents are under consideration to replace CF3Br in suppressing aircraft cargo bays fires. In a Federal Aviation Administration performance test simulating the explosion of an aerosol can, however, the replacements, when added at sub-inerting

Large Scale Fire Dynamics in Spacecraft in Reduced Gravity

June 1, 2011
Author(s)
Gregory T. Linteris
Numerical fire codes are being widely used for understanding normal gravity fires. The goal of the present project was to modify one such code, the National Institute of Standards and Technology Fire Dynamics Simulator, so that it can be used to accurately

Absorption of Thermal Radiation by Burning Polymers

February 2, 2011
Author(s)
Gregory T. Linteris, Mauro Zammarano, Boris Wilthan, Leonard M. Hanssen
In large-scale fires, the input of energy to burning materials occurs predominantly by radiative transfer. The in-depth absorption of radiant energy by a polymer influences its ignition time and burning rate. The present investigation examines two methods

Clean agent suppression of energized electrical equipment fires

January 3, 2011
Author(s)
Gregory T. Linteris
The NFPA 2001 standard on the use of clean agents for the suppression of fires arose from the phase-out of Halon 1301. Standard methods exists for specifying the amount of clean agent required for Class A and Class B fires, but the recommendation for Class

NUMERICAL SIMULATION OF POLYMER MATERIALS IN STANDARD FIRE TESTS: PYROLYSIS AND THE IMPACT OF RESIDUE FORMATION

July 31, 2010
Author(s)
Florian Kempel, Bernhard Schartel, Anja Hofmann, Gregory T. Linteris, Richard E. Lyon, Richard N. Walters, Stanislav Stoliarov
Two different numerical simulation tools, Fire Dynamic Simulator FDS and ThermaKin, are investigated with respect to their capability to predict the mass loss rate of polymer materials exposed to different fires. For validation, gasification apparatus and

Heat release and structural collapse of flexible polyurethane foam

January 1, 2010
Author(s)
Roland H. Kraemer, Mauro Zammarano, Gregory T. Linteris, Ulf W. Gedde, Jeffrey W. Gilman
Flexible polyurethane foam used in upholstered furniture remains one of the major fire hazards to date. The heat release rate of burning items made of foam depends strongly on the foam's physical behavior, notably its collapse to a burning liquid that can

Clean Agent Suppression of Energized Electrical Equipment Fires

January 1, 2009
Author(s)
Gregory T. Linteris
The NFPA 2001 standard on the use of clean agents for the suppression of fires arose from the phase-out of Halon 1301. Standard methods exists for specifying the amount of clean agent required for Class A and Class B fires, but the recommendation for Class

Prediction of the Burning Rate of Non-Charring Polymers

January 1, 2009
Author(s)
Stanislav Stoliarov, Sean Crowley, R Lyon, Gregory T. Linteris
This study demonstrates that a numerical pyrolysis model called ThermaKin, which was developed by SRA International, Inc. and the Federal Aviation Administration, can be used to predict and extrapolate the results of gasification and cone calorimetry

Flame Size, Heat Release, and Smoke Points in Materials Flammability

August 1, 2008
Author(s)
Gregory T. Linteris, I P. Rafferty
The concept of using the flame size as a surrogate for heat release rate has been explored. A technique for simultaneously obtaining the heat release rate, flame size (height and area), and the smoke point of the flame solely from visual images has been