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Author: william pitts

Displaying records 71 to 80 of 118 records.
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71. Carbon Monoxide Measurement Using a Near-Infrared Tunable Diode Laser (NISTIR 6242)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6242
Published: 10/1/1998
Authors: L G. Blevins, William M Pitts, D S Bomse
Abstract: 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 r ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911626

72. Temperature Uncertainties for Bare-Bead and Aspirated Thermocouple Measurements in Fire Environments (NISTIR 6242)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6242
Published: 10/1/1998
Authors: William M Pitts, E Braun, Richard D Peacock, Henri E. Mitler, Erik L Johnsson, Paul A Reneke, L G. Blevins
Abstract: 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 the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911792

73. Scaling the Near-Field Centerline Mixing Behavior of Axisymmetric Turbulent Jets
Published: 9/1/1998
Authors: G Papadopoulos, William M Pitts
Abstract: 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 Rayleig ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911785

74. Effects of Finite Time Response and Soot Deposition on Thin Filament Pyrometry Measurements in Time-Varying Diffusion Flames
Published: 8/2/1998
Authors: William M Pitts, K C Smyth, D Everest
Abstract: 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 u ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911636

75. Towards Full Field Scaling of the Centerline Behavior for Initially Turbulent Axisymmetric Jets
Published: 6/21/1998
Authors: G, Papadopoulos, William M Pitts
Abstract: Recently the authors introduced a length scale for effectively collapsing the near field centerline velocity and mass fraction of constant and variable density axisymmetric jets whose initial conditions correspond to those of fully developed turbulen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911806

76. Carbon Monoxide Formation Algorithm (NISTIR 6030)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6030
Published: 6/1/1997
Author: William M Pitts
Abstract: 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.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911624

77. Algorithm for Estimating Carbon Monoxide Formation in Enclosure Fires
Published: 3/3/1997
Author: William M Pitts
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911619

78. Mixing Behavior of Absolutely Unstable Axisymmetric Shear Layers Forming Side Jets
Published: 1/1/1997
Authors: William M Pitts, A W Johnson
Abstract: Recently it has been shown that low-density axisymmetric jets can become absolutely unstable and develop highly coherent vortical structures in the near-field shear layer. These jets have several unusual properties when compared to jets which are con ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911722

79. Thin-Filament Pyrometry in Flickering Laminar Diffusion Flames
Published: 7/28/1996
Author: William M Pitts
Abstract: 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 f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911805

80. Rapid Discharge of a Fire Suppressing Agent
Published: 1/1/1996
Authors: Jiann C Yang, William M Pitts, B D Breuel, William L Grosshandler, W G Cleveland
Abstract: 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 ob ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911557



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