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Displaying 3176 - 3200 of 3892

MODELING OF HYDROGEN FLUORIDE FORMATION FROM FLAME SUPPRESSANTS DURING COMBUSTION

January 1, 1995
Author(s)
Valeri I. Babushok, Donald R. Burgess Jr., Gregory T. Linteris, Wing Tsang, A W. Miziolek
We have completed an initial computational study related to acid gas formation for two of the leading near-term Halon substitutes, FE-13 (CF,H) and HFC-125 (C,F,H), and compared these results with Halon 1301 (CF,Br). Our goal is to determine whether we can

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

SELECTION OF A SIMULANT OF CF3Br FOR USE IN ENGINE NACELLE CERTIFICATION TESTS

January 1, 1995
Author(s)
C A. Womeldorf, William L. Grosshandler, M Mitchell
This paper describes the selection of a simulant of CF3Br for the purpose of certification testing engine nacelles fire suppression systems. In order to illustrate the storage, delivery, and distribution requirements of CF3Br, relevant characteristics of

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

Heat Release Mechanisms in Inhibited Laminar Counterflow Flames (Conference)

November 6, 1994
Author(s)
Ki Y. Lee, Don J. Cha, I K. Puri, Anthony Hamins
Both the chemical kinetic and thermal channels of inhibition must be simultaneously characterized in order to understand the effectiveness of chemical agents on flame stability. However, due to the participation of inhibitors in flame chemistry, it is

Simulating the Effect of Flat Beamed Ceiling on Detector and Sprinkler Response

November 6, 1994
Author(s)
Glenn P. Forney, Richard W. Bukowski, William D. Davis
This paper documents a portion of the work performed during the first year of the International Fire Detection Research Project sponsored by the National Fire Protection Research Foundation (NFPRF). The first task was to confirm that fire sensor response

Suppression of Simulated Engine Nacelle Fires (NISTIR 5499)

October 17, 1994
Author(s)
Anthony P. Hamins, D. Baghdadi, P. Borthwick, M Glover, William L. Grosshandler, D L. Lowe, L Melton, Cary Presser
The engine nacelle encases the jet engine compressor, combustor and turbine. A nacelle fire is typically a turbulent diffusion flame stabilized behind an obstruction in a moderately high speed air flow. The most likely source for a fire in the nacelle are

Field Modeling: Simulating the Effect of Sloped Beamed Ceilings on Detector and Sprinkler Response. International Fire Detection Research Project. Technical Report. Year 2

October 1, 1994
Author(s)
William D. Davis, Glenn P. Forney, Richard W. Bukowski
The rapid activation of fire detection and suppression systems in response to a growing fire is one of the important factors required to provide for life safety and property protection. Rapid activation requires that sensors be located at optimal distances

Visual Measurement Technique for Analysis of Nucleate Flow Boiling (NISTIR 5519)

October 1, 1994
Author(s)
Mark A. Kedzierski, J. M. Crowder, A. M. Jacobi, L. Zhang
This report records a visual measurement technique for analyzing bubbles formed by nucleate flow boiling. The purpose of measuring these bubbles is to expand understanding the boiling process. By studying the behavior of these vapor bubbles, a better

Acid Gas Production in Inhibited Premixed Flames (NISTIR 5499)

September 1, 1994
Author(s)
Gregory T. Linteris, M D. King, A Liu
Halogenated fire extinguishing agents such as CF3Br decompose in flames to form hydrogen halides such as HF and HBr and other toxic and corrosive products. Possible replacements for halon 1301 are required in significantly higher concentrations to

Experimental Study of the Optical Properties of Soot and Smoke (NISTIR 5499)

September 1, 1994
Author(s)
M Y. Choi, George W. Mulholland, Anthony Hamins, Takashi Kashiwagi
The accurate measurement of flame-generated particlates is a problem of current interest to researchers in the fire and combustion community. Within the flame, the soot concentration measurement is central to the study of soot growth and for radiant

Fire-Induced Mass Flow Into a Reduced-Scale Enclosure (NISTIR 5499)

September 1, 1994
Author(s)
Erik L. Johnsson, Nelson P. Bryner, William M. Pitts
Enclosure fires are of great interest because of the resulting loss of life and property, yet the fluid dynamic and chemical behaviors of fires within enclosures are still not well understood. In recent decades, it has become clear that burning rates, fire

Flame Suppression Effectiveness of Halon Alternatives (NISTIR 5499)

September 1, 1994
Author(s)
William L. Grosshandler, Anthony P. Hamins
The elimination of new production of halon 1301 has forced the manufacturers, owners, and users of aircraft to search for an alternative. The program described here developed performance screens for candidate agents as a means to identify the best
Displaying 3176 - 3200 of 3892
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