TY - JOUR
T1 - Simultaneous temperature and species measurements of the Glycidyl Azide polymer (GAP) propellant during laser-induced decomposition
AU - Tang, Ching Jen
AU - Lee, Youngjoo
AU - Litzinger, Thomas A.
N1 - Funding Information:
This work was performed under grant F49620-93-0430 under the sponsorship of Air Force Office of Scientific Research. The support and encouragement of Dr. Mitat A. Birkan are greatly appreciated. The authors acknowledge Tony Manzara and Dr. Jerry Finlinson for providing the GAP material and the curing procedure of GAP.
PY - 1999/4
Y1 - 1999/4
N2 - Simultaneous temperature and species measurements were performed to experimentally investigate thermal decomposition of cured Glycidyl Azide Polymer (GAP). Experiments were conducted at atmospheric pressure in argon with heat fluxes of 50, 100, and 200 W/cm2 delivered by CO2 laser. A micro- probe/triple quadrupole mass spectrometer system was used to analyze species products, and thermocouples were used to measure temperature. The burning behavior was monitored by a high-magnification video system. The following major species, in descending order of abundance, were detected: N2, HCN, CO, CH2O, NH3, CH3CHO, CH2CHCHNH, CH3CHNH, H2O, CH4, and C2H4. The mole fraction of hydrocarbons was about 0.02, while the mole fraction of imines was 0.09. The decomposition of GAP appeared to be dominated by the condensed phase chemistry and few reactions occurred in the gas phase. A significant amount of fine solid powder was observed in the gas phase, which was believed to be imines. It was found that the species and temperature were insensitive to the heat flux level. The mole fractions of the observed species at a heat flux 100 W/cm2 were almost the same as those at a heat flux of 200 W/cm2, and the surface temperature was approximately 1050 K at both heat fluxes.
AB - Simultaneous temperature and species measurements were performed to experimentally investigate thermal decomposition of cured Glycidyl Azide Polymer (GAP). Experiments were conducted at atmospheric pressure in argon with heat fluxes of 50, 100, and 200 W/cm2 delivered by CO2 laser. A micro- probe/triple quadrupole mass spectrometer system was used to analyze species products, and thermocouples were used to measure temperature. The burning behavior was monitored by a high-magnification video system. The following major species, in descending order of abundance, were detected: N2, HCN, CO, CH2O, NH3, CH3CHO, CH2CHCHNH, CH3CHNH, H2O, CH4, and C2H4. The mole fraction of hydrocarbons was about 0.02, while the mole fraction of imines was 0.09. The decomposition of GAP appeared to be dominated by the condensed phase chemistry and few reactions occurred in the gas phase. A significant amount of fine solid powder was observed in the gas phase, which was believed to be imines. It was found that the species and temperature were insensitive to the heat flux level. The mole fractions of the observed species at a heat flux 100 W/cm2 were almost the same as those at a heat flux of 200 W/cm2, and the surface temperature was approximately 1050 K at both heat fluxes.
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U2 - 10.1016/S0010-2180(98)00112-6
DO - 10.1016/S0010-2180(98)00112-6
M3 - Article
AN - SCOPUS:0032924179
SN - 0010-2180
VL - 117
SP - 244
EP - 256
JO - Combustion and Flame
JF - Combustion and Flame
IS - 1-2
ER -