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Search Publications by: Thomas Cleary (Fed)

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Displaying 251 - 275 of 291

Upward Flame Spread on Composite Materials

January 1, 1995
Author(s)
Thomas J. Ohlemiller, Thomas G. Cleary
Three existing models of upward flame spread were tested against intermediate-scale experiments on a vinyl-ester/glass composite. Characterization of rate of heat release per unit area, needed as input to the models, was obtained at external radiant fluxes

Pipe Flow Characteristics of Alternative Agent/Nitrogen Mixtures (NISTIR 5499)

September 1, 1994
Author(s)
Thomas G. Cleary, M D. King, Jiann C. Yang, William L. Grosshandler
The evaluation of alternative agents for application in engine nacelle fire protection includes delivery efficiency of agent from a remote storge bottle through piping to the nacelle injection loacation. Present military requirements for halon systems

Upward Flame Spread on Composite Materials

August 28, 1994
Author(s)
Thomas J. Ohlemiller, Thomas G. Cleary
The composite materials of interest in this work contain several piles of long, high strength fibers, typically woven in some fixed pattern; the layered multi-ply structure is embedded with an organic polymer resin. Such composites offer a high strength-to

Compatibility of Halon Alternatives During Storage

August 21, 1994
Author(s)
Richard G. Gann, Carlos R. Beauchamp, Thomas G. Cleary, J L. Fink, Richard H. Harris Jr., F Horkay, G B. McKenna, Thomas P. Moffat, Marc R. Nyden, Richard D. Peacock, Richard E. Ricker, Mark R. Stoudt, W. K. Waldron
A key facet of the evaluation of new fire suppressants is their behavior under pressure and at elevated temperature in a metal storage container with an elastomer seal. In this study, 13 candidate chemicals have been examines: C2F6, C3F8, C4F10, cyclo-C4F8

Agent Stability Under Storage and Discharge Residue (NIST SP 861)

April 1, 1994
Author(s)
Richard D. Peacock, Thomas G. Cleary, Richard H. Harris Jr.
Halon 1301 is known to be stable in metal containers for many years. Any by-products do not affect its fire suppression effectiveness or result in an unacceptable residue. For candidate replacement chemicals, comparable data are needed, reflecting the

Flame Suppression Effectiveness (NIST SP 861)

April 1, 1994
Author(s)
Anthony P. Hamins, G. Gmurczyk, William L. Grosshandler, R. G. Rehwoldt, I Vazquez, Thomas G. Cleary, Cary Presser, K Seshadri
A flame will be extinguished when the time required for the chain reaction which sustains combustion exceeds the time it takes to replenish the necessary heat and reactants. A characteristic time for reaction can be estimated from the inverse of a global

Flow of Alternative Agents in Piping

January 1, 1994
Author(s)
Thomas G. Cleary, William L. Grosshandler, Jiann C. Yang
As part of the USAF, Army, Navy and FAA sponsored halon replacement project, the pipe flow characteristics of selected alternative agents for engine nacelle tire protection are being studied. Due to the remote location of the agent storage bottle, piping

Heat Flux From Flames to Vertical Surfaces

January 1, 1994
Author(s)
J. G. Quintiere, Thomas Cleary
Dimensional analysis is used to examine heat transfer from flames to vertical surfaces. Configurations include a line fire against a wall, a square burner flame against a wall and in a corner, and window flames impinging on a wall. Dimensionless parameters

Influence of Ignition Source on the Flaming Fire Hazard of Upholstered Furniture

January 1, 1994
Author(s)
Thomas G. Cleary, Thomas J. Ohlemiller, K M. Villa
A set of upholstered chairs constructed from five different fabric/foam combinations was subjected to a variety of ignition sources suggested by fire statistics. The sources included a cigarette, a small match-like flame, an incandescent lamp, a space

Simulation of Dry Bay Discharge of Alternative Agents

January 1, 1994
Author(s)
Jiann C. Yang, Thomas G. Cleary, William L. Grosshandler
As a continuation of the USAF/Navy/Amy/FAA sponsored halon replacement project, the discharge characteristics of the three selected akernative agents (CFJ, FC-218. and HFC- 125) for dry bay applications will be further evaluated. Halon 1301 will also be

Agent/System Compatibility for Halon 1301 Aviation Replacement

October 20, 1993
Author(s)
Richard G. Gann, E Braun, Thomas G. Cleary, Richard H. Harris Jr., F Horkay, Gregory T. Linteris, G B. McKenna, Marc R. Nyden, Richard D. Peacock, Richard E. Ricker, Mark R. Stoudt, W. K. Waldron
This project has developed measurement methods and provided data for the appraisal of 12 USAF-specified candidate halon 1301 replacements for compatibility with flight systems, people, and the environment. The exposures of metals, elastomers and lubricants

Assessing the Flammability of Composite Materials

July 30, 1993
Author(s)
Thomas J. Ohlemiller, Thomas G. Cleary, James E. Brown, John R. Shields
Composite materials offer the potential for substantial weight savings in the structure of both surface ships and submarines. However, the organic nature of the binder resins in these materials implies that one would be replacing non-flammable materials