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Search Publications by: William M. Pitts (Assoc)

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Displaying 76 - 100 of 128

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

Carbon Monoxide Formation Algorithm (NISTIR 6030)

June 1, 1997
Author(s)
William M. Pitts
This paper discusses an engineering approach for estimating the generation rate of carbon monoxide (CO) within a room containing a fire. The algorithm incorporates four CO formation mechanisms which have been identified in past investigations.

Algorithm for Estimating Carbon Monoxide Formation in Enclosure Fires

March 3, 1997
Author(s)
William M. Pitts
This paper introduces an engineering approach for estimating the generation rate of carbon monoxide (CO) within a room containing a fire. Four CO formation mechanisms: 1) quenching of a turbulent fire plume upon entering a rich upper layer, 2) mixing of

Thin-Filament Pyrometry in Flickering Laminar Diffusion Flames

July 28, 1996
Author(s)
William M. Pitts
This paper describes an experimental system for thin-filament pyrometry (TFP) in acoustically phase-locked flickering laminar methane/air diffusion flames. The physical basis of the technique is discussed. The experiment utilizes a 15-mu m beta-SiC fiber

Rapid Discharge of a Fire Suppressing Agent

January 1, 1996
Author(s)
Jiann C. Yang, William M. Pitts, B D. Breuel, William L. Grosshandler, W G. Cleveland
This paper describes an experimental method to study the rapid discharge of a fire suppressant (C3F8) from a pressurized vessel. Experimental observations inside and at the exit of the vessel were made using high-speed photography. Boiling was not observed

Real-Time Suppressant Concentration Measurement (NIST SP 890)

November 1, 1995
Author(s)
William M. Pitts, George W. Mulholland, B D. Breuel, Erik L. Johnsson, S Chung, Richard H. Harris Jr., D E. Hess
The development and testing of two approaches for recording real-time measurements (millisecond time resolution) of concentration for halon alternatives are summarized. Discussions of the background necessary to understand their operation is included. The

Species Concentration Measurements (NISTIR 5766)

November 1, 1995
Author(s)
William M. Pitts
The objective if this effort is to evaluate possible methods for real-time measurements of concentrations of alternative fire extinguishing agents for dry-bay and nacelle fire applications. If one or more feasible approaches are identified early in the

Scaling Compartment Fires - Reduced- and Full-Scale Enclosure Burns.

September 10, 1995
Author(s)
Nelson P. Bryner, Erik L. Johnsson, William M. Pitts
An extensive series of over 140 natural gas fires in a 2/5ths-scale model of a standard room has been previously reported. This work extends the earlier reduced-scale enclosure (RSE) study to a full-scale enclosure (FSE) and focuses on comparing the gas

Combustion Product Formation in Under and Overventilated Full-Scale Enclosure Fires

April 23, 1995
Author(s)
William M. Pitts, Nelson P. Bryner, Erik L. Johnsson
The findings of an extensive series of over 140 natural gas fires in a 2/5ths-scale model of a standard room have been previously reported. The current work extends the earlier reduced-scale enclosure (RSE) study to a full-scale enclosure (FSE) and focuses