Abstract
Metalized solid propellants have higher final flame temperatures and higher flame radiant intensities than non-metalized propellants. However, the importance of radiative heat feedback in metalized propellant combustion is still relatively unknown. In this study, radiative effects in metalized propellants containing aluminum, boron, and magnesium were examined by embedding optical fibers and micro-thermocouples in propellants to measure radiative and conductive feedback, respectively. Extinguishment by rapid depressurization was used to determine the condition and location of the thermocouple and optical fiber at the burning surface. Hemispherical reflectivity measurements were also made to determine propellant absorptivity. The reflectivity measurements showed that even a small amount of a metal powder in a propellant increases the absorptivity significantly. In the metalized propellants, radiative heat feedback is a significant fraction of the total feedback and is strongly dependent on pressure in low pressure range and metal loading. These results suggest that radiative feedback should be considered in burn rate models of propellants which contain aluminum, magnesium, or boron as well as other metals.
| Original language | English (US) |
|---|---|
| Title of host publication | ASME/JSME Thermal Engineering Joint Conference |
| Publisher | Publ by ASME |
| Pages | 35-40 |
| Number of pages | 6 |
| ISBN (Print) | 0791806162 |
| State | Published - 1991 |
| Event | Proceedings of the 3rd ASME/JSME Thermal Engineering Joint Conference Part 5 (of 5) - Reno, NV, USA Duration: Mar 17 1991 → Mar 22 1991 |
Other
| Other | Proceedings of the 3rd ASME/JSME Thermal Engineering Joint Conference Part 5 (of 5) |
|---|---|
| City | Reno, NV, USA |
| Period | 3/17/91 → 3/22/91 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
Effect of radiative heat feedback on burning rate of metalized propellants. / Ishihara, A.; Brewster, M Quinn; Sheridan, T. A.; Krier, Herman.
ASME/JSME Thermal Engineering Joint Conference. Publ by ASME, 1991. p. 35-40.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Effect of radiative heat feedback on burning rate of metalized propellants
AU - Ishihara, A.
AU - Brewster, M Quinn
AU - Sheridan, T. A.
AU - Krier, Herman
PY - 1991
Y1 - 1991
N2 - Metalized solid propellants have higher final flame temperatures and higher flame radiant intensities than non-metalized propellants. However, the importance of radiative heat feedback in metalized propellant combustion is still relatively unknown. In this study, radiative effects in metalized propellants containing aluminum, boron, and magnesium were examined by embedding optical fibers and micro-thermocouples in propellants to measure radiative and conductive feedback, respectively. Extinguishment by rapid depressurization was used to determine the condition and location of the thermocouple and optical fiber at the burning surface. Hemispherical reflectivity measurements were also made to determine propellant absorptivity. The reflectivity measurements showed that even a small amount of a metal powder in a propellant increases the absorptivity significantly. In the metalized propellants, radiative heat feedback is a significant fraction of the total feedback and is strongly dependent on pressure in low pressure range and metal loading. These results suggest that radiative feedback should be considered in burn rate models of propellants which contain aluminum, magnesium, or boron as well as other metals.
AB - Metalized solid propellants have higher final flame temperatures and higher flame radiant intensities than non-metalized propellants. However, the importance of radiative heat feedback in metalized propellant combustion is still relatively unknown. In this study, radiative effects in metalized propellants containing aluminum, boron, and magnesium were examined by embedding optical fibers and micro-thermocouples in propellants to measure radiative and conductive feedback, respectively. Extinguishment by rapid depressurization was used to determine the condition and location of the thermocouple and optical fiber at the burning surface. Hemispherical reflectivity measurements were also made to determine propellant absorptivity. The reflectivity measurements showed that even a small amount of a metal powder in a propellant increases the absorptivity significantly. In the metalized propellants, radiative heat feedback is a significant fraction of the total feedback and is strongly dependent on pressure in low pressure range and metal loading. These results suggest that radiative feedback should be considered in burn rate models of propellants which contain aluminum, magnesium, or boron as well as other metals.
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M3 - Conference contribution
AN - SCOPUS:0026382656
SN - 0791806162
SP - 35
EP - 40
BT - ASME/JSME Thermal Engineering Joint Conference
PB - Publ by ASME
ER -