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The effects of velocity boundary conditions on the structure of methane-air nonpremixed counterflow flames were investigated by two-dimensional numerical simulation. Two low global strain rates, 12 s-1 and 20 s-1, were considered for comparison with
The focus of this effort is to investigate the dispersal of liquid fire suppression agents around solid obstacles, and obtain a better understanding of the physical processes of droplet transport in cluttered spaces. An experimental investigation is
Xiaohong Gu, D T. Raghavan, D L. Ho, Li Piin Sung, Mark R. VanLandingham, Tinh Nguyen
The effect of network changes on the surface and interface properties of amine-cured epoxy has been investigated. Samples of different crosslinked epoxies are prepared by mixing stoichiometrically pure diglycidyl ether of bisphenol A (n=0.03) with
Potential means of limiting early age cracking ofconcrete structures have been investigated. Threedifferent methods of mitigating autogenous strainsand stresses in cement mortars (w/s=0.35, 8 % silica fume) are compared: 1.) reduction of thesurface tension
tecting degradation faults remains a challenge in spite of the advances in monitoring and controls software. Basic monitoring equipment can be used to detect the most obvious faults. However, degradation faults can have a small effect on the system s
Fuel cells are emerging as one of the most promising technologies for meeting the nation s energy needs. Fuel cell efficiencies, approaching 60 percent, are nearly twice as efficient as conventional power plants. Fuel cells are environmentally clean and
The effects of relative humidity ranging from ~0% to 90 % on the moisture-enhanced photolysis (MEP) of a partially-methylated melamine acrylic polymer coating exposed to ultraviolet (UV) radiation at 50 oC have been investigated. The UV source was two 1000
Jonathan W. Martin, Tinh Nguyen, E Byrd, E Embree, B Dickens
A cumulative damage model and a laboratory apparatus are described for linking field and laboratory photodegradation results and for predicting the service life of polymeric materials exposed in the laboratory and field. The apparatus was designed to
Laser light scattering and thermophoretic sampling have been used to investigate particle formation in a methane-air counterflow diffusion flames inhibited by iron pentacarbonyl (Fe(CO)5) added to the fuel or the oxidizer stream. Flame calculations which
I. A. Mendelssohn, Q. Lin, K. Carney, Nelson P. Bryner, William D. Walton
Oil spills pose a serious risk to the health of wetland systems. A cleanup technique that is compatible with the wetland environment and is consistent with present wetland management procedures would be highly valued. In-situ burning of oiled wetlands
It is indeed an honor to have the opportunity to participate in this NIST Centennial Standards Symposium. I, like many of you, was engaged by Larry Eicher's war games model this morning, a Standards War Game. My talk deals mostly with the second and third
Daniel M. Madrzykowski, Glenn P. Forney, William D. Walton
This report describes the results of calculations using the NIST Fire Dynamics Simulator (FDS) that were performed to provide insight on the thermal conditions that may have occurred during a fire in a two-story duplex house on December 22, 1999, in Iowa
The seismic safety evaluation and mitigation standards, Standards for Seismic Safety for Existing Federally Owned and Leased Buildings, were developed for use by the Federal Government by the Interagency Committee on Seismic Safety in Construction (ICSSC)
This paper summarizes efforts to identify properties of aerosols (liquids and solids) leading to effective fire suppression. It is part of the US Department of Defenses Next Generation Fire Suppression Technology Program (NGP) supported by the DoD
M D. Rumminger, Valeri I. Babushok, Gregory T. Linteris
Chemically-active fire suppressants may, due to their properties or the means by which they are added to flames, have strong inhibition effects in particular locations in a flame. To study the spatial effects of chemically-active inhibitors, numerical
Laser light scattering and thermophoretic sampling have been used to investigate particle formation in counterflow diffusion flames inhibited by iron pentacarbonyl (Fe(CO) 5). Three CH 4-O 2-N 2 reactant mixtures are investigated, with Fe(CO) 5 added to
Takashi Kashiwagi, E Grulke, J Hilding, Richard H. Harris Jr., W H. Awad, J. F. Douglas
Nanocomposites based on polypropylene and carbon nanotubes (up to 2 vol.-%) were melt blended, yielding a good dispersion of nanotubes without using any organic treatment or additional additives. Carbon nanotubes are found to significantly enhance the
The thermodynamics of oxides, carbonates, halides and related metal compounds involved in extinguishment by dry chemicals and metal agents has been analyzed. It is shown that lattice energies play an important role in determining the extinguishment
D W. Stroup, Laurean A. DeLauter, J Lee, G Roadarmel
A series of fire tests were conducted to characterize the potential hazard from ignition of men's suits hanging on racks. The fire test scenario was selected as part of a fire investigation being conducted by the U.S. Department of Treasury's Bureau of
D W. Stroup, Laurean A. DeLauter, J Lee, G Roadarmel
A series of fire tests were conducted to characterize the potential hazard from ignition of an upholstered chair. The particular chair was selected as part of a fire investigation being conducted by the U.S. Department of Treasury's Bureau of Alcohol
William M. Pitts, E Braun, Richard D. Peacock, Henri E. Mitler, Erik L. Johnsson, Paul A. Reneke, L G. Blevins
Temperature measurements have been made for natural-gas and heptane fires in a reduced-scale enclosure using a variety of bare-bead and aspirated thermocouples in order to characterize the uncertainties. The focus is the role of radiative heat transfer and
Selected functional parts from a sports coupe were subjected to a gas: flame ignition source and burned in a manner that allowed measurement of the resulting total heat release rate and heat fluxes to the surroundings. This is the second part of a study