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Displaying 201 - 224 of 224

Executive Summary (NIST SP 861)

April 1, 1994
Author(s)
William L. Grosshandler, Richard G. Gann, William M. Pitts
Bromotrifluoromethane (halon 1301 or CF3Br) has been the fire-fighting agent of choice for decades to protect inaccessible spaces aboard aircraft in flight because of its inherent ability to inhibit combustion while possessing a high liquid density and

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

Fluid Dynamics of Agent Discharge (NIST SP 861)

April 1, 1994
Author(s)
William M. Pitts, Jiann C. Yang, G. Gmurczyk, Leonard Y. Cooper, William L. Grosshandler, W G. Cleveland, Cary Presser
The extinguishment of a fire using gaseous agents is a very complicated process which is not completely understood. Current fire-fighting agents such as halon 1301 and halon 1211 are believed to function by a combination of chemical (catalytic removal of

Introduction (NIST SP 861)

April 1, 1994
Author(s)
William L. Grosshandler, Richard G. Gann, William M. Pitts
The Montreal Protocol of 1987 identified halon 1301 (CF3Br) as one of a number of halogenated chemicals that were sufficiently deleterious to stratospheric ozone that their continued production and use required limitation. An amendment to the Protocol

Summary and Recommendations (NIST SP 861)

April 1, 1994
Author(s)
William L. Grosshandler, Richard G. Gann, William M. Pitts
The main objective of this research program was to provide guidance to the sponsors on which materials to evaluate in the full-scale fire suppression test plan at Wright-Patterson AFB. Specifically, the recommendations were to include the following: 1) The

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

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 Screening for Halon 1301 Aviation Replacement

October 20, 1993
Author(s)
William L. Grosshandler, Richard G. Gann, Anthony P. Hamins, Marc R. Nyden, William M. Pitts, Jiann C. Yang, Michael R. Zachariah
A comprehensive experimental program is described in which eleven gaseous agents and sodium bicarbonate powder have been screened, so that the best three candidates for subsequent full-scale aircraft fire extinguishment evaluation can be identified

Solubilities of Nitrogen and Freon-23 in Alternative Halon Replacement Agents

May 11, 1993
Author(s)
Jiann C. Yang, B D. Breuel, William L. Grosshandler
As part of the USAF-sponsored halon replacement project, solubility measurements of nitrogen and Freon-23 in eleven potential halon replacement agents and evaluations of the thermodynamic properties of the agents are currently being conducted at NIST. The

Acoustic Emission of Structural Materials Exposed to Open Flames

December 1, 1992
Author(s)
William L. Grosshandler, M A. Jackson
The use of acoustic emission (AE) as an early indicator of structural materials exposed to a flame has been investigated and found to be possible. Piezoelectric transducers have been mounted directly on 0.5 m long, simply supported beams of aluminum

Acoustic Emission of Structural Materials Exposed to Open Flames

December 1, 1992
Author(s)
William L. Grosshandler, M A. Jackson
The use of acoustic emission (AE) as an early indicator of structural materials exposed to a flame has been investigated and found to be possible. Piezoelectric transducers have been mounted directly on 0.5 m long, simply supported beams of aluminum
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