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Search Publications by: William M. Pitts (Assoc)

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Displaying 226 - 250 of 257

Sidejet Strength and Mixing in Self-Excited Jets. [Abstract ONLY]

November 21, 1993
Author(s)
A W. Johnson, William M. Pitts
Absolutely unstable jet flows are known to produce vigorous and intermittent lateral ejections of fluid, or 'sidejets'. Sidejet generation has been attributed to the near-field interaction of axisymmetric vorticies, streamwise vorticies, and lobes formed

Rayleigh Light Scattering Studies of Turbulent Mixing

October 25, 1993
Author(s)
William M. Pitts
Turbulent combustion remains a very active research area. This interest is justified due to the pivotal role it plays in a wide variety of technologically important processes. Development of models for combusting flows is crucial for the more efficient

Agent Screening for Halon 1301 Aviation Replacement

October 20, 1993
Author(s)
William L. Grosshandler, Richard G. Gann, Anthony P. Hamins, Marc R. Nyden, William M. Pitts, Jiann C. Yang, Michael R. Zachariah
A comprehensive experimental program is described in which eleven gaseous agents and sodium bicarbonate powder have been screened, so that the best three candidates for subsequent full-scale aircraft fire extinguishment evaluation can be identified

Dynamics of the Release of Alternate Halon Replacement Agents From Pressurized Bottles

May 11, 1993
Author(s)
William M. Pitts, Jiann C. Yang, B D. Breuel, W G. Cleveland, G. Gmurczyk
Halon 1301 has been widely employed on military and commercial aircraft for fire fighting purposes. Unfortunately, due to the deleterious effects of chlorine and bromine on stratospheric ozone, the manufacture of halon 1301 will be phased out by the end of

Production Mechanisms for Carbon Monoxide in Enclosure Fires

March 15, 1993
Author(s)
William M. Pitts, Nelson P. Bryner, Erik L. Johnsson
Roughly two thirds of all deaths resulting from enclosure fires can be attributed to the presence of carbon monoxide (CO), which is known to be the dominant toxicant in fire deaths. The mechanisms responsible for the generation of high concentrations of CO

Global Density Effects on the Self-Preservation Behavior of Turbulent Free Jets

January 1, 1993
Author(s)
C D. Richards, William M. Pitts
An experimental investigation was designed to test the hypothesis that all axisymmetric turbulent free jets become asymptotically independent of the source conditions and may be described by classical similarity analysis. Effects of initial conditions were

Greatly Enhanced Soot Scattering in Flickering CH4/Air Diffusion Flames

January 1, 1993
Author(s)
K C. Smyth, J E. Harrington, Erik L. Johnsson, William M. Pitts
Planar images of laser-induced fluorescence from OH radicals and elastic scattering from soot particles are presented in time-varying laminar CH4/air diffusion flames burning in a co-flowing, axisymmetric configuration at atmospheric pressure. Acoustic

Carbon Monoxide Production and Prediction (NISTIR 4449)

October 19, 1989
Author(s)
William M. Pitts
A long-term research plan has been formulated which is designed to improve the understanding of and predictive capability for the formation of carbon monoxide in enclosure fires. The current understanding of the problem is briefly discussed. Goals
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