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Search Publications by: Rodney A. Bryant (Fed)

Displaying 51 - 75 of 126

Characterizing Inward Leakage in a Pressure-Demand, Self-Contained Breathing Apparatus

June 10, 2011

Author(s)

Rodney A. Bryant, Amy Mensch

An analytical model of the flow across a resistive flow path such as an orifice or pipe was applied to predict the inward leakage in the facepiece of a self-contained breathing apparatus (SCBA) during a steady negative facepiece pressure. The model was

Real-Time Monitoring of Total Inward Leakage of Respiratory Equipment Used by Emergency responders: Workshop Proceedings

September 27, 2010

Author(s)

Kathryn M. Butler, Marc R. Nyden, Rodney A. Bryant

A workshop on respirator sensors was held at the National Institute of Standards and Technology (NIST) on May 1, 2009. The objective of this workshop was to discuss and document the need for real-time monitoring of the respiratory intake of emergency

Evaluating Practical Measurements of Fire-Induced Vent Flows with Stereoscopic PIV

September 9, 2010

Author(s)

Rodney A. Bryant

Stereoscopic particle image velocimetry (SPIV) was applied to a fire-induced doorway flow to provide the velocity field for computations of the mass flow rate of air into an enclosure. For a flow of uniform temperature and concentration, the technique

Predicting Inward Leakage for Negative Pressure Conditions in a Firefighter Respirator

July 12, 2010

Author(s)

Rodney A. Bryant

An analytical model of the flow across a resistive flow path such as an orifice or pipe was applied to predict the inward leakage in an SCBA facepiece during a steady negative facepiece pressure. Starting with a range of negative pressure conditions

Application of Stereoscopic PIV to Measure the Flow of Air Into An Enclosure Containing a Fire

August 1, 2009

Author(s)

Rodney A. Bryant

Flow fields encountered in full-scale enclosure fires are highly three-dimensional and span a large spatial extent. Stereoscopic particle image velocimetry (SPIV) was applied to provide a large-scale planar interrogation of the flow of air available to a

The Application of Stereoscopic Particle Image Velocimetry to Measure the Flow of Air into an Enclosure Containing a Fire

July 26, 2009

Author(s)

Rodney A. Bryant

Flow fields encountered in full-scale enclosure fires are highly three-dimensional and span over a large spatial extent. Stereoscopic Particle Image Velocimetry (SPIV) was applied to provide a large-scale planar interrogation of the flow of air available

A Comparison of Gas Velocity Measurement Techniques in the Doorway of a Full-Scale Enclosure Fire

July 1, 2009

Author(s)

Rodney A. Bryant

Gas velocity measurements were conducted in the doorway of an enclosure containing a natural gas fire. Two independent measurement techniques, Stereoscopic Particle Image Velocimetry (SPIV) and bi-directional impact-pressure probes, were utilized for

Comparison of Methane and Propane Diffusion Flame Extinguishment by Thermal Agents An Experimental and Detailed Kinetic Modeling Study

May 17, 2009

Author(s)

William M. Pitts, Jiann C. Yang, Rodney A. Bryant, Linda G. Blevins

A combined computational and experimental study of methane and propane flames burning in air diluted with thermal agents is described. Detailed kinetic modeling of opposed-jet diffusion flames and experimental extinguishing volume fraction measurements for

Guide to Characterizing Heat Release Rate Measurement Uncertainty for Full-Scale Fire Tests

April 1, 2008

Author(s)

Rodney A. Bryant, George W. Mulholland

Accurate heat release rate measurements provide essential information to defining the fire safety characteristics of products. The size, complexity, and cost of full-scale fire tests make achieving accurate and quantitative results a serious challenge. A

An Investigation of Extinguishment by Thermal Agents Using Detailed Chemical Modeling of Opposed Jet Diffusion Flames

March 3, 2008

Author(s)

William M. Pitts, Jiann C. Yang, Rodney A. Bryant, Linda G. Blevins

Detailed chemical kinetic modeling of methane planar opposed-jet laminar diffusion flames burning in air mixed with a variety of thermal agents is used to characterize their effects on maximum flame temperature and extinction behavior. The identification

A guide to characterizing heat release rate measurement uncertainty for full-scale fire tests

January 4, 2008

Author(s)

Rodney A. Bryant, George W. Mulholland

Guidelines for Breakout Sessions (NIST SP 1051)

December 1, 2007

Author(s)

Rodney A. Bryant

Real-Time Particulate Monitoring - Detecting Respiratory Threats for First Responders: Workshop Proceedings

December 1, 2007

Author(s)

Rodney A. Bryant, Kathryn M. Butler, R Vettori, P Greenberg

The overhaul of a fire scene is a stage of firefighting where respiratory protection is often disregarded due to the perception of low risk and the desire to remove the heavy and cumbersome self-contained breathing apparatus. The need for alternative