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Displaying 3151 - 3175 of 3892

Minimizing Throttline Losses in the Refrigeration Cycle

August 1, 1995
Author(s)
Piotr A. Domanski
Most alternative non-CFC refrigerants have a large molecular structure and large heat capacity, which influence the slope of saturated liquid line and result in substantial throttling losses in a basic reversed Rankine cycle. These losses degrade the cycle

Inhibition of Premixed Methane-Air Flames by Iron Pentacarbonyl

July 31, 1995
Author(s)
Gregory T. Linteris, G. Gmurczyk
Brominated fire suppressants are effective and widely used. Due to their destruction of stratospheric ozone, however, the production of these chemical was halted in January 1994. Although testing and development of possible substitutes is occurring, a

Quantifying the Ignition Propensity of Cigarettes

July 1, 1995
Author(s)
Thomas J. Ohlemiller, K M. Villa, E Braun, K Eberhardt, Richard H. Harris Jr., James R. Lawson, Richard G. Gann
Research funded under the Fire Safe Cigarette Act of 1990 (United States Public Law 101-35) has led to the development of two test methods for measuring the ignition propensity of cigarettes. The Mock-Up Ignition Test Method uses substrates physically

Volume Rendering of Pool Fire Data

July 1, 1995
Author(s)
H. Rushmeier, Anthony Hamins, M Y. Choi
In a pool fire, an ignited puddle or pool of liquid fuel burns in the atmosphere. Understanding pool fires is important to devising methods to control the hazards resulting from spilled fuels. In this case study we consider techniques for visualizing the

Characteristics of Pool Fire Burning

June 20, 1995
Author(s)
Anthony P. Hamins, Takashi Kashiwagi, R Buch
The structure and energetics of hydrocarbons burning in a pool fire configuration are reviewed. Examples of non-hydrocarbons are also presented. The character and structure of pool fires are discussed with special regard to the flame shape, flame pulsation

Model for Calculating Alternative Agent/Nitrogen Thermodynamic Properties

May 9, 1995
Author(s)
Jiann C. Yang, Marcia L. Huber, C I. Boyer
A thermodynamic model based on the extended corresponding states principle has been developed to calculate the solubilities of nitrogen in five selected agents, HFC-227ea, CF3I, FC-218, HFC-125, and CF3Br and the pressure-temperature relationship for agent

Parametric Study of Hydrogen Fluoride Formation in Suppressed Fires

May 9, 1995
Author(s)
Gregory T. Linteris, G. Gmurczyk
Some of the proposed replacements for CF3Br, the fluorinated hydrocarbons, are required in higher concentrations to extinguish fires and contain more halogen atoms per molecule. Since they decompose in the flame, they produce correspondingly more hydrogen

Combustion Product Formation in Under and Overventilated Full-Scale Enclosure Fires

April 23, 1995
Author(s)
William M. Pitts, Nelson P. Bryner, Erik L. Johnsson
The findings of an extensive series of over 140 natural gas fires in a 2/5ths-scale model of a standard room have been previously reported. The current work extends the earlier reduced-scale enclosure (RSE) study to a full-scale enclosure (FSE) and focuses

Tomographic Reconstruction of the Local PDFS of Soot Volume Fraction and Temperature

April 23, 1995
Author(s)
Y. R. Sivathanu, Anthony Hamins, Robert Hagwood, Takashi Kashiwagi
Deconvolution of local properties from line-of-sight measurements is important in a wide variety of applications such as x-ray tomography, nuclear magnetic resonance imaging, atmospheric sciences, optical inteferometry and flow field diagnostics. The Radon

Evaluation of Sprinkler Activation Prediction Methods

March 15, 1995
Author(s)
Daniel M. Madrzykowski
The objective of this study was to evaluate the ability of sprinkler activation models to predict activation time. Large scale compartment fire tests were used to obtain activation times for four different types of sprinklers. The tests were conducted in

Fast Variable-Amplitude Cold Gas Thruster

March 1, 1995
Author(s)
William C. Stone
A fast response variable amplitude cold gas thruster is described. A laboratory prototype comprised of a piezoelectric stack and an associated microporcessor-based programmable dc power source, a low-loss mechanical displacement amplifier, a high-pressure

Fire Performance of an Interstitial Space Construction System (NISTIR 5560)

February 1, 1995
Author(s)
James R. Lawson, E Braun, Laurean A. DeLauter, G Roadarmel
An interstitial space building construction assembly, consisting of a walk-on deck suspended from above by structural steel which also supported a functional floor, reproduce a design planned for use in a new hospital complex at Elmendorf Air Force Base
Displaying 3151 - 3175 of 3892
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