TY - JOUR
T1 - Flame propagation of nano/micron-sized aluminum particles and ice (ALICE) mixtures
AU - Sundaram, Dilip S.
AU - Yang, Vigor
AU - Connell, Terrence L.
AU - Risha, Grant A.
AU - Yetter, Richard A.
N1 - Funding Information:
The authors would like to thank the Air Force Office of Scientific Research (AFOSR) and NASA for their sponsorship of this program under contract no. FA9550-11-1-0002.
PY - 2013
Y1 - 2013
N2 - Flame propagation of aluminum-ice (ALICE) mixtures is studied theoretically and experimentally. Both a mono distribution of nano aluminum particles and a bimodal distribution of nano- and micron-sized aluminum particles are considered over a pressure range of 1-10 MPa. A multi-zone theoretical framework is established to predict the burning rate and temperature distribution by solving the energy equation in each zone and matching the temperature and heat flux at the interfacial boundaries. The burning rates are measured experimentally by burning aluminum-ice strands in a constant-volume vessel. For stoichiometric ALICE mixtures with 80 nm particles, the burning rate shows a pressure dependence of rb = aPn, with an exponent of 0.33. If a portion of 80 nm particles is replaced with 5 and 20 μm particles, the burning rate is not significantly affected for a loading density up to 15-25% and decreases significantly beyond this value. The flame thickness of a bimodal-particle mixture is greater than its counterpart of a mono-dispersed particle mixture. The theoretical and experimental results support the hypothesis that the combustion of aluminum-ice mixtures is controlled by diffusion processes across the oxide layers of particles.
AB - Flame propagation of aluminum-ice (ALICE) mixtures is studied theoretically and experimentally. Both a mono distribution of nano aluminum particles and a bimodal distribution of nano- and micron-sized aluminum particles are considered over a pressure range of 1-10 MPa. A multi-zone theoretical framework is established to predict the burning rate and temperature distribution by solving the energy equation in each zone and matching the temperature and heat flux at the interfacial boundaries. The burning rates are measured experimentally by burning aluminum-ice strands in a constant-volume vessel. For stoichiometric ALICE mixtures with 80 nm particles, the burning rate shows a pressure dependence of rb = aPn, with an exponent of 0.33. If a portion of 80 nm particles is replaced with 5 and 20 μm particles, the burning rate is not significantly affected for a loading density up to 15-25% and decreases significantly beyond this value. The flame thickness of a bimodal-particle mixture is greater than its counterpart of a mono-dispersed particle mixture. The theoretical and experimental results support the hypothesis that the combustion of aluminum-ice mixtures is controlled by diffusion processes across the oxide layers of particles.
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U2 - 10.1016/j.proci.2012.06.129
DO - 10.1016/j.proci.2012.06.129
M3 - Article
AN - SCOPUS:84872020454
SN - 1540-7489
VL - 34
SP - 2221
EP - 2228
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
IS - 2
ER -