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Ignition and Combustion Characteristics of Pure Bulk Metals: Normal-Gravity Test ResultsAn experimental apparatus has been designed for the study of bulk metal ignition under elevated, normal and reduced gravity environments. The present work describes the technical characteristics of the system, the analytical techniques employed, the results obtained from the ignition of a variety of metals subjected to normal gravity conditions and the first results obtained from experiments under elevated gravity. A 1000 W xenon short-arc lamp is used to irradiate the top surface of a cylindrical metal specimen 4 mm in diameter and 4 mm high in a quiescent pure-oxygen environment at 0.1 MPa. Iron, titanium, zirconium, magnesium, zinc, tin, and copper specimens are investigated. All these metals exhibit ignition and combustion behavior varying in strength and speed. Values of ignition temperatures below, above or in the range of the metal melting point are obtained from the temperature records. The emission spectra from the magnesium-oxygen gas-phase reaction reveals the dynamic evolution of the ignition event. Scanning electron microscope and x-ray spectroscopic analysis provide the sequence of oxide formation on the burning of copper samples. Preliminary results on the effect of higher-than-normal gravity levels on the ignition of titanium specimens is presented.
Document ID
19970001785
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Abbud-Madrid, A. (Colorado Univ. Boulder, CO United States)
Fiechtner, G. J. (Colorado Univ. Boulder, CO United States)
Branch, M. C. (Colorado Univ. Boulder, CO United States)
Daily, J. W. (Colorado Univ. Boulder, CO United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Publication Information
Publisher: American Inst. of Aeronautics and Astronautics
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
AIAA Paper 94-0574
NAS 1.26:202589
NASA-CR-202589
Meeting Information
Meeting: Aerospace Sciences
Location: Reno, NV
Country: United States
Start Date: January 10, 1994
End Date: January 13, 1994
Sponsors: American Inst. of Aeronautics and Astronautics
Accession Number
97N11556
Funding Number(s)
CONTRACT_GRANT: NAG3-1257
Distribution Limits
Public
Copyright
Public Use Permitted.

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