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Search Publications by: Thomas Cleary (Fed)

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Displaying 126 - 150 of 153

Aerosol and SPGG Technology Fire Suppression Screening Methods (NISTIR 5904)

October 28, 1996
Author(s)
William L. Grosshandler, Jiann C. Yang, Thomas G. Cleary
The search for alternatives to halons for fire suppression applications has identified not only new compounds which have physical properties similar to the bromochlorofluorocarbon family, but also inert gaseous agents that are released from a solid state

Signatures of Smoldering/Pyrolyzing Fires for Multi-Element Detector Evaluation

March 26, 1996
Author(s)
Thomas G. Cleary, William L. Grosshandler, Marc R. Nyden, William J. Rinkinen
Levels of CO, CO2, H2O, hydrocarbons, smoke, temperature and velocity produced in the plumes of smoldering/pyrolyzing wood and smoldering cotton fires are reported, following test protocols described for evaluating automatic fire detection systems. The

Optimization of System Discharge (NIST SP 890)

November 1, 1995
Author(s)
Jiann C. Yang, Thomas G. Cleary, I Vazquez, C I. Boyer, M D. King, B D. Breuel, C A. Womeldorf, William L. Grosshandler, Marcia L. Huber, L Weber, G. Gmurczyk
Current aircraft fire suppression bottles for dry bay and engine nacelle applications, which are designed to meet Military Specification MIL-C-22284A (proof pressure of 9.62 MPa and minimum burst pressure of 12.37 MPa), are normally filled with liquid

Suppression of Engine Nacelle Fires (NIST SP 890)

November 1, 1995
Author(s)
Anthony P. Hamins, Thomas G. Cleary, P. Borthwick, N Gorchkov, Kevin B. McGrattan, Glenn P. Forney, William L. Grosshandler, Cary Presser, L Melton
A series of experimental measurements were conducted and simple models were developed in an effort to provide an improved understanding of the influence of various parameters on the processes controlling flame stability in engine nacelle applications. The

Storage and Discharge Characteristics of Halon Alternatives

October 21, 1995
Author(s)
Jiann C. Yang, Thomas G. Cleary, I Vazquez, C I. Boyer, M D. King, B D. Breuel, Marcia L. Huber, L Weber
Three important issues regarding the use of halon alternatives for in-flight fire protection applications were studied as part of the current halon alternative research program at the National Institute of Standards and Technology (NIST): (1) the

Suppression Criteria in Engine Nacelle Fires

October 21, 1995
Author(s)
Anthony P. Hamins, Thomas G. Cleary
A series of experimental measurements were conducted and simple models were developed in an effort to provide an improved understanding of the influence of various parameters on the processes controlling flame stability in engine nacelle applications. The

Pipe Flow Characteristics of Alternative Agents for Engine Nacelle Fire Protection

January 1, 1995
Author(s)
Thomas G. Cleary, Jiann C. Yang, William L. Grosshandler, Michelle King, C I. Boyer
As part of the U.S. Air Force, Army, Navy and FAA Halon Replacement Project at NIST, the pipe flow characteristics were investigated for three engine nacelle alternative candidates: HFC-227ea, HFC-125 and CF31. The flow regime in suppression system piping

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

Non-Halogenated, Flame Retarded Polycarbonate

February 9, 1993
Author(s)
Takashi Kashiwagi, Thomas G. Cleary, G C. Davis, J H. Lupinski
Various flammability properties of a siloxane-containing bisphenol-A polycarbonate sample, with the siloxane as an additive or as a copolymer, were measured and compared with those of a pure polycarbonate sample. The results show that the peak heat release

Effects of Sample Mounting on Flammability Properties of Intumescent Polymers

January 1, 1993
Author(s)
Takashi Kashiwagi, Thomas G. Cleary
Various flammability properties of polycarbonate samples were measured with the Cone Calorimeter and Lateral Ignition and Flame Spread, LIFT, devices at various external fluxes. Four different sample mountings were used with the Cone Calorimeter to
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