Aluminum Flame Temperature Measurements in Solid Propellant Combustion

The temperature in an aluminized propellant is determined as a function of height and plume depth from diatomic AlO and thermal emission spectra. Higher in the plume, 305 and 508 mm from the burning surface, measured AlO emission spectra show an average temperature with 1σ errors of 2980 ± 80 K. Low...

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Bibliographic Details
Published in:Applied spectroscopy 2014-03, Vol.68 (3), p.362-366
Main Authors: Parigger, Christian G., Woods, Alexander C., Surmick, David M., Donaldson, A.B., Height, Jonathan L.
Format: Article
Language:English
Subjects:
Aluminum
Combustion
Emissivity
Error analysis
Mathematical models
Plumes
Solid propellant combustion
Thermal emission
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Description
Summary:The temperature in an aluminized propellant is determined as a function of height and plume depth from diatomic AlO and thermal emission spectra. Higher in the plume, 305 and 508 mm from the burning surface, measured AlO emission spectra show an average temperature with 1σ errors of 2980 ± 80 K. Lower in the plume, 152 mm from the burning surface, an average AlO emission temperature of 2450 ± 100 K is inferred. The thermal emission analysis yields higher temperatures when using constant emissivity. Particle size effects along the plume are investigated using wavelength-dependent emissivity models.
ISSN:0003-7028
1943-3530
DOI:10.1366/13-07234