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Displaying 2526 - 2550 of 3902

On the Suitability of CF3Br as a Benchmark replacement Fire Suppressants

April 24, 2001
Author(s)
B A. Williams, J W. Fleming
We investigate the rationale for the use of CF,Br as a reference standard for alternative fire suppresants. Stating efficiencies of alternative agents on a relative basis to that of CF,Br is well founded from an engineering standpoint, but less so from a

Premixed Flame Inhibition by Manganese and Tin Compounds

April 24, 2001
Author(s)
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
Flame inhibition data exist for a few metallic compounds (Fe(CO)5, Pb(C2H5)4, CrO2Cl2) which show them to be one or two orders of magnitude more effective than halon 1301 at reducing the burning velocity of premixed methane-air flames. Little burning

TOWARDS SUBGRID SCALE MODELING OF SUPPRESSANT FLOW IN ENGINE NACELLE CLUTTER

April 24, 2001
Author(s)
P E. DesJardin, J M. Nelson, L A. Gritzo, David R. Keyser, T A. Ghee, J R. Tucker, P J. Disimile
The release and transport of a suppressant agent into an enclosed compartment is sensitive to local geometrical features or “clutter” that is difficult to resolve numerically without using an excessively large CFD grid. Such examples include wire bundles

Transient Application Recirculating Pool Fire, Agent Effectiveness Screen: Final Report

April 24, 2001
Author(s)
William L. Grosshandler, Anthony P. Hamins, Jiann C. Yang, Kevin B. McGrattan, Cary Presser
A three-year research effort has been conducted as part of the Next Generation Program (NGP) to develop a laboratory screening device suitable for predicting the behavior of halon alternatives in full-scale fire suppression experiments. Most of the work

Analysis of Samples Removed from a Damaged Pipeline

April 15, 2001
Author(s)
Paul E. Stutzman
A set of specimens adhered to a pipe, provided by National Safety Transportation Board (NTSB), were examined for microstructure evaluation. The section of a 40.6 cm diameter gasoline pipeline from which the specimens were obtained showed signs of

NIST Multizone Modeling Website

April 2, 2001
Author(s)
William S. Dols
This report presents an overview of the NIST Multizone Modeling Website developed by the Building and Fire Research Laboratory of the National Institute of Standards and Technology (NIST). Multizone modeling refers to the calculation of airflows, pressure

Acquiring, Analyzing, and Using Complete Three-Dimensional Aggregate Shape Information

April 1, 2001
Author(s)
Edward J. Garboczi, Nicos Martys, H A. Saleh, Richard A. Livingston
The shape of aggregates, from whatever source, plays a crucial role in determining the properties of the composite material in which they are embedded (e.g., asphaltic or portland cement concrete). To properly characterize this three-dimensional shape

Concrete Mixing Methods and Concrete Mixers: State of the Art

April 1, 2001
Author(s)
Chiara F. Ferraris
The performance of concrete is determined by its microstructure. Its microstructure, in turn, is determined by its composition, its curing conditions, and also by the mixing method used to process the concrete. This paper gives an overview of the various

Curing of High-Performance Concrete for Strength: Phase I Study

April 1, 2001
Author(s)
Nicholas J. Carino, K W. Meeks
This paper reports the results of an exploratory study on the effects of curing duration on the variation of mortar strength with distance from the drying surface. A novel, notched cylindrical test specimen was adopted for measuring tensile strength at

Design Procedures for Structures with Supplemental Dampers

April 1, 2001
Author(s)
Fahim Sadek, Michael A. Riley
Passive energy dissipation devices are used to reduce the damage from earthquakes by absorbing a portion of the earthquake-induced energy in structures. Wide acceptance of these devices in structures will depend on the availability of simplified methods

Experiences with Using Solar Photovoltaics to Heat Domestic Water

April 1, 2001
Author(s)
Brian P. Dougherty, Arthur H. Fanney
The solar photovoltaic (PV) industry continues to make progress in increasing the efficiency while reducing the manufacturing costs of PV cells. Economies of scale are being realized as manufacturers expand their production capabilities. Products are

International Standards for Design Life of Constructed Assets

April 1, 2001
Author(s)
C Sjostrom, P Jernberg, G J. Frohnsdorff
In 1993, a working group aimed at developing standards for design life was established in ISO Technical Committee TC59, Building Construction. The working group was later elevated to subcommittee status as ISO/TC59/SC14 - Design Life. The purpose of the

NIST Research on Structural Performance of Housing Systems

April 1, 2001
Author(s)
Fahim Sadek, Michael A. Riley
An outline of NIST research in the area of structural performance of housing systems is presented in this paper. The performance of wood-frame houses in past earthquakes and hur-ricanes is summarized, and the state-of-the-art in experimental and analytical

Premixed Flame Inhibition by Manganese and Tin Compounds

April 1, 2001
Author(s)
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
In this work we presented the first experimental measurements of influence of manganese- and tin-containing compounds (MMT, TMT0 on burning velocity of methane/air flames. We have also developed kinetic models describing the inhibition mechanisms
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