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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Печать: 2150-766X
ISSN Онлайн: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.810
pages 876-884

OVERTONE ABSORPTION SPECTROSCOPY OF SOLID PROPELLANT FLAMES: CO AND N2O CONCENTRATIONS

J. A. Vanderhoff
U.S. Army Research Laboratory, Attn: AMSRL-WT-PC, Aberdeen Proving Ground, MD 21005
S. H. Modiano
SCEEE Postdoctoral Fellow from Hendrix College, Conway, AR 72032
B. E. Homan
SCEEE Postdoctoral Fellow from Hendrix College, Conway, AR 72032
M. W. Teague
IPA Faculty Fellow from Hendrix College, Conway, AR 72032

Краткое описание

In a continuing investigation of the chemical composition of the dark zones of double-base and nitramine solid propellants, additional multichannel infrared absorption experiments have been performed. The experiment has been improved by the addition of mirrors on a portion of the chamber windows effecting a "triple-pass" of the beam through the sample region. Overtone absorptions for CO at 2.3 μm and N2O at 3.9 μm were measured and analyzed to determine absolute concentration and temperature. Least-squares fitting routines using the HITRAN database were developed and used for this analysis. The solid propellants, JA2 and XM39, were probed under steady-state combustion conditions in a nitrogen environment of 1.0−1.3 MPa pressure. CO is a major gas species in these propellant flames and concentrations of about 0.35 and 0.12 mole fraction were obtained in the dark zones of JA2 and XM39, respectively. Small absorption signals were found in the spectral region appropriate for N2O and an upper limit of 0.02 mole fraction was determined for XM39. No absorption in this region was observed for JA2. These results are in qualitative agreement with published values.


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