TY - JOUR
T1 - Combustion of nano-aluminum and liquid water
AU - Risha, G. A.
AU - Son, S. F.
AU - Yetter, R. A.
AU - Yang, V.
AU - Tappan, B. C.
N1 - Funding Information:
This work was sponsored by the U.S. Army Research Office under the Multi-University Research Initiative under Contract No. W911NF-04-1-0178 and the Office of Naval Research (ONR) under Grant No. N00014-03-1-0595. The support and encouragement provided by Drs. David Mann, Kevin L. McNesby, and Gabriel Roy are gratefully acknowledged. S.F.S. and B.C.T. are supported by the Joint Munitions Program (DoD/DOE) at the Los Alamos National Laboratory (LANL), which is operated by the University of California for the U.S. Department of Energy under the Contract No. W-7405-ENG-36. The authors thank personnel at LANL, specifically Mr. Ed Roemer for the SEM micrographs of the particles, Mr. Eric Sanders for supplying the 38-nm aluminum particles, and Dr. Joseph T. Mang for SAS and BET data for the 80-nm particles.
PY - 2007
Y1 - 2007
N2 - An experimental investigation on the combustion behavior of nano-aluminum (nAl) and liquid water has been conducted. In particular, linear and mass-burning rates of quasi-homogeneous mixtures of nAl and liquid water as a function of pressure, mixture composition, particle size, and oxide layer thickness were measured. This study is the first reported self-deflagration on nAl and liquid water without the use of any additional gelling agent. Steady-state burning rates were obtained at room temperature (∼25 °C) using a windowed vessel for a pressure range of 0.1-4.2 MPa in an argon atmosphere, particle diameters of 38-130 nm, and overall mixture equivalence ratios (Φ) from 0.5 to 1.25. At the highest pressure studied, the linear burning rate was found to be 8.6 ± 0.4 cm/s, corresponding to a mass-burning rate per unit area of 6.1 g/cm2 s. The pressure exponent at room temperature was 0.47, which was independent of the overall mixture equivalence ratio for all of the cases considered. The mass-burning rate per unit area increased from ∼1.0 to 5.8 g/cm2 s for an equivalence ratio range of 0.5-1.25. It varied inversely to particle diameter, increasing by 157% when the particle diameter was decreased from 130 to 50 nm at Φp = 1.0.
AB - An experimental investigation on the combustion behavior of nano-aluminum (nAl) and liquid water has been conducted. In particular, linear and mass-burning rates of quasi-homogeneous mixtures of nAl and liquid water as a function of pressure, mixture composition, particle size, and oxide layer thickness were measured. This study is the first reported self-deflagration on nAl and liquid water without the use of any additional gelling agent. Steady-state burning rates were obtained at room temperature (∼25 °C) using a windowed vessel for a pressure range of 0.1-4.2 MPa in an argon atmosphere, particle diameters of 38-130 nm, and overall mixture equivalence ratios (Φ) from 0.5 to 1.25. At the highest pressure studied, the linear burning rate was found to be 8.6 ± 0.4 cm/s, corresponding to a mass-burning rate per unit area of 6.1 g/cm2 s. The pressure exponent at room temperature was 0.47, which was independent of the overall mixture equivalence ratio for all of the cases considered. The mass-burning rate per unit area increased from ∼1.0 to 5.8 g/cm2 s for an equivalence ratio range of 0.5-1.25. It varied inversely to particle diameter, increasing by 157% when the particle diameter was decreased from 130 to 50 nm at Φp = 1.0.
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U2 - 10.1016/j.proci.2006.08.056
DO - 10.1016/j.proci.2006.08.056
M3 - Conference article
AN - SCOPUS:34047098588
SN - 1540-7489
VL - 31 II
SP - 2029
EP - 2036
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
IS - 2
T2 - 31st International Symposium on Combustion
Y2 - 5 August 2006 through 11 August 2006
ER -