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Displaying 3051 - 3075 of 3873

Simple Piezoelectric Droplet Generator

January 1, 1997
Author(s)
Jiann C. Yang, W. S. Chien, M D. King, William L. Grosshandler
A design for a piezoelectric on-demand droplet generator is presented. Its simple construction and ease of operation distinguish this generator from other previously reported. The droplet generator has been successfully used to produce droplets of aqueous

Influence of CF3I, CF3Br, and CF3H on the High-Temperature Combustion of Methane

December 1, 1996
Author(s)
Valeri I. Babushok, T Noto, D R. Burgess, Anthony P. Hamins, Wing Tsang
The effects of a number of flame retardants (CF3I, CF3Br, and CF3H) on the high-temperature reactions of methane with air in a plug flow reactor are studied by numerical simulations using the Sandia Chemkin Code. The dependence of (a) the ignition dely and

Modeling and Measurements of Soot and Species in a Laminar Diffusion Flame.

December 1, 1996
Author(s)
I. M. Kennedy, C Yam, D. C. Rapp, R J. Santoro, Wing Tsang
A model of laminar, soot-laden ethene diffusion flames has been developed and compared with measurements in nonsooting and sooting flames. Concentrations of stable gas-phase species were measured with mass spectrometry; laser-induced fluorescence was used

Aerosol and SPGG Technology Fire Suppression Screening Methods (NISTIR 5904)

October 28, 1996
Author(s)
William L. Grosshandler, Jiann C. Yang, Thomas G. Cleary
The search for alternatives to halons for fire suppression applications has identified not only new compounds which have physical properties similar to the bromochlorofluorocarbon family, but also inert gaseous agents that are released from a solid state

Heat Flux Calibration Flow and Conduction Facilities: Status Report

October 28, 1996
Author(s)
Kenneth D. Steckler, William L. Grosshandler
Standard methods exist at NIST for calibrating thermal radiation detectors up to 10 kW/m2 using blackbody caviies, and up to 40kW/m2 using a monochromatic laser source. Heat Flux transducers, however, are often used under conditions where convection

Limiting Throttling Losses by Intracycle Evaporative Cooling

October 20, 1996
Author(s)
B. S. Kim, Piotr A. Domanski
The temperature glide of zeotropic mixtures during phase change provides the opportunity to limit throttling losses of the refrigerant leaving the condenser. The difference between the intracycle evaporative cooling and the liquid-line/suction-line heat

Comparison of CFAST Predictions to Real Scale Fire Tests

October 15, 1996
Author(s)
Walter W. Jones, J. L. Bailey, P. A. Tatem, Glenn P. Forney
This paper describes a new algorithm of the Consolidated Fire Growth and Smoke Transport (CFAST) fire model and compares to data from real scale fire tests conducted onboard the ex-USS SHADWELL, the Navy's R&D Damage Control Platform. The new phenomenon

Evaporation of a Small Aqueous Suppressing Agent Droplet (NISTIR 5904)

October 1, 1996
Author(s)
W. S. Chien, Jiann C. Yang, M D. King, William L. Grosshandler
Due to its ozone-depleting potential, halon 1301 (CF3Br) has been banned from production under the Montreal Protocol. The research for halon replacement(s) has led to the reconsideration of using water in certain applications. However, under cold storage

Computations of Enhanced Soot Production in Time-Varying CH4/Air Diffusion Flames

September 1, 1996
Author(s)
C. R. Kaplan, C. R. Shaddix, K C. Smyth
Recent experimental measurements of soot volume fraction in a flickering CH4/air diffusion flame show that for conditions in which the tip of the flame is clipped, soot productions is ~ 5 times greater than that measured for a steady flame burning with the

Intracycle Evaporative Cooling in a Vapor Compression Cycle (NISTIR 5873)

September 1, 1996
Author(s)
B. S. Kim, Piotr A. Domanski
The temperature glide of zeotropic mixtures during phase change provides the opportunity to limit throttling losses of the refrigeration cycle by intracycle evaporative cooling of the refrigerant leaving the condenser. Intracycle evaporative cooling is

Selection of Calibration Particles for Scanning Surface Inspection Systems

August 8, 1996
Author(s)
George W. Mulholland, Nelson P. Bryner, Walter S. Liggett Jr, B W. Scheer, R. K. Goodall
In response to the semiconductor industry's need for both smaller calibration particles and more accurately sized larger particles, a joint SEMATECH, National Institute of Standards and Technology, and VLSI Standards, Inc. project was initiated to

Effect of Load Path on Damage to Concrete Bridge Piers

August 1, 1996
Author(s)
A W. Taylor, A El-Bahy, William C. Stone, S K. Kunnath
In earthquake engineering studies of reinforced concrete (RC) bridge columns, a controlled, cyclic lateral load pattern with gradually increasing amplitude has traditionally been applied to laboratory test specimens. However, in actual earthquakes bridge

Enhancement of EXIT89 and Analysis of World Trade Center Data

August 1, 1996
Author(s)
R F. Fahy
The features of an enhanced model for egress from fires in non-residential occupancies is presented along with a users manual describing the use of the model. The enhancements to the model include analysis of locations of safety, smoke blockages, disabled

Chemical Effects of CF3H in Extinguishing Counterflow CO/Air/H2 Diffusion Flames

July 28, 1996
Author(s)
G. S. Fallon, H K. Chelliah, Gregory T. Linteris
The relative importance of introducing CF3H as a fire suppressant with the oxidizer or the fuel stream, and its chemical and thermal effects on the extinction condition of counterflow CO/air/H2 diffusion flames, are investigated both experimentally and
Displaying 3051 - 3075 of 3873
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