TY - JOUR
T1 - Combustion of alane and aluminum with water for hydrogen and thermal energy generation
AU - Connell, Terrence L.
AU - Risha, Grant A.
AU - Yetter, Richard A.
AU - Young, Gregory
AU - Sundaram, Dilip S.
AU - Yang, Vigor
N1 - Funding Information:
The sponsorship by the Air Force Office of Scientific Research (AFOSR) and NASA for this program under Contract No. FA9550-07-1-0582 is greatly appreciated. The authors greatly appreciate Rob Uhlig, Bryan Sones, and Lynn Witherite at the Applied Research Laboratory of The Pennsylvania State University for providing the test cell facility for high-pressure strand experiments. Thanks are also due to Bohan Kuo for her assistance in setup and calibration of the Micro GC.
PY - 2011
Y1 - 2011
N2 - The combustion of alane and aluminum with water in its frozen state has been studied experimentally and theoretically. Both nano and micron-sized particles are considered over a broad range of pressure. The linear burning rate and chemical efficiency are obtained using a constant-pressure strand burner and constant-volume cell, respectively. The effect of replacing nano-Al particles by micron-sized Al and alane particles are examined systematically with the additive mass fraction up to 25%. The equivalence ratio is fixed at 0.943. The pressure dependence of the burning rate follows the power law, r b = aPn, with n ranging from 0.41 to 0.51 for all the materials considered. The burning rate decreases with increasing alane concentration, whereas it remains approximately constant with cases containing only Al particles. The chemical efficiency ranged from 32% to 83%, depending on the mixture composition and pressure. Thermo-chemical analyses are conducted to provide insight into underlying causes of the decreased burning rate of the alanized compositions. A theoretical model is also developed to explore the detailed flame structure and burning properties. Reasonably good agreement is achieved with experimental observations.
AB - The combustion of alane and aluminum with water in its frozen state has been studied experimentally and theoretically. Both nano and micron-sized particles are considered over a broad range of pressure. The linear burning rate and chemical efficiency are obtained using a constant-pressure strand burner and constant-volume cell, respectively. The effect of replacing nano-Al particles by micron-sized Al and alane particles are examined systematically with the additive mass fraction up to 25%. The equivalence ratio is fixed at 0.943. The pressure dependence of the burning rate follows the power law, r b = aPn, with n ranging from 0.41 to 0.51 for all the materials considered. The burning rate decreases with increasing alane concentration, whereas it remains approximately constant with cases containing only Al particles. The chemical efficiency ranged from 32% to 83%, depending on the mixture composition and pressure. Thermo-chemical analyses are conducted to provide insight into underlying causes of the decreased burning rate of the alanized compositions. A theoretical model is also developed to explore the detailed flame structure and burning properties. Reasonably good agreement is achieved with experimental observations.
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U2 - 10.1016/j.proci.2010.07.088
DO - 10.1016/j.proci.2010.07.088
M3 - Article
AN - SCOPUS:79251603485
SN - 1540-7489
VL - 33
SP - 1957
EP - 1965
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
IS - 2
ER -