Publications

Displaying 151 - 175 of 257

Investigation of Extinguishment by Thermal Agents Using Detailed Chemical Kinetic Modeling of Opposed-Flow Diffusion Flames

October 10, 1999

Author(s)

William M. Pitts, L G. Blevins

The manufacture of halons, which are widely used in fire extinguishing systems, was banned in 1984. The search for effective alternatives continues with a large effort known as the Next Generation Fire Suppression Technology Program (NGP). As part of the

Characterization and Identification of Super-Effective Thermal Fire Extinguishing Agents. First Annual Report.

October 1, 1999

Author(s)

William M. Pitts, Jiann C. Yang, Marcia L. Huber, L G. Blevins

The use of halons for fire fighting is being phased out due to their deleterious effects on stratospheric ozone. This report summarizes the first-year findings of a three-year study designed to characterize and identify super-effective thermal fire

Large- and Small-Scale Structures and Their Interactions in an Axisymmetric Jet (NISTIR 6393)

October 1, 1999

Author(s)

William M. Pitts, C D. Richards, M Levenson

A real-time line camera system has been used to record Rayleigh light scattering along a laser beam passing radially through a propane axisymmetric turbulent jet (Re = 3960) flowing into quiescent air. The measured intensities along with a wavelet analysis

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

April 27, 1999

Author(s)

William M. Pitts, L G. Blevins

The manufacture of the halons widely used in fire extinguishing systems was banned in 1994 due to their deleterious effect on stratospheric ozone. Since the late 1980s there have been ongoing research efforts to identify replacement agents having

Modeling of Bare and Aspirated Thermocouples in Compartment Fires

April 1, 1999

Author(s)

L G. Blevins, William M. Pitts

As part of an effort to characterize the uncertainties associated with temperature measurements in fire environments, models of bare bead single-shielded aspirated, and double-shielded aspirated thermocouples were developed and used to study the effects of

Modeling of Bare and Aspirated Thermocouples in Compartment Fires (NISTIR 6310)

April 1, 1999

Author(s)

L G. Blevins, William M. Pitts

Temperature Uncertainties for Bare-Bead and Aspirated Thermocouple Measurements in Fire Environments

March 14, 1999

Author(s)

William M. Pitts, E Braun, Richard D. Peacock, Henri E. Mitler, Erik L. Johnsson, Paul A. Reneke, L G. Blevins

Gas-phase temperature is the most ubiquitous measurement recorded in fire environments and plays a central role in understanding of fire behavior. Generally, either bare-bead or sheathed thermcouples are employed. While it is recognized that such

Generic Centerline Velocity Decay Curve for Initially Turbulent Axisymmetric Jets

March 1, 1999

Author(s)

G Papadopoulos, William M. Pitts

Recently the authors introduced a length scale which effectively collapsed the near field centerline development of velocity and mass fraction for variable density axisymmetric jets whose initial conditions correspond to those of fully developed turbulent

Characterization and Identification of Super-Effective Thermal Fire Extinguishing Agents- First Annual Report

January 1, 1999

Author(s)

William M. Pitts, Jiann C. Yang, Marcia L. Huber, L G. Blevins

Carbon Monoxide Measurement Using a Near-Infrared Tunable Diode Laser (NISTIR 6242)

October 1, 1998

Author(s)

L G. Blevins, William M. Pitts, D S. Bomse

One important goal of fire research is to study the formation and consumption of chemical species in and around a fire. Instruments which possess rapid temporal response are required for resolving species concentration fluctuations and for studying rapid

Temperature Uncertainties for Bare-Bead and Aspirated Thermocouple Measurements in Fire Environments (NISTIR 6242)

October 1, 1998

Author(s)

William M. Pitts, E Braun, Richard D. Peacock, Henri E. Mitler, Erik L. Johnsson, Paul A. Reneke, L G. Blevins

Scaling the Near-Field Centerline Mixing Behavior of Axisymmetric Turbulent Jets

September 1, 1998

Author(s)

G Papadopoulos, William M. Pitts

Detailed measurements of the centerline mixing behavior in the near field of varible-density jets were performed. Real-time measurements of jet fluid concentration for a propane jet and a methane jet issuing into still air were made utilizing Rayleigh

Effects of Finite Time Response and Soot Deposition on Thin Filament Pyrometry Measurements in Time-Varying Diffusion Flames

August 2, 1998

Author(s)

William M. Pitts, K C. Smyth, D Everest

Prior work has shown that thin filament pyrometry (TFP) is a powerful approach for making highly precise, spatially and temporally resolved line measurements of temperature in time-varying laminar diffusion flames. The technique has been previously used to

Search Publications by: William M. Pitts (Assoc)