Ignition and Combustion of Pyrotechnic Compositions Based on Microand Nanoparticles of Aluminum Diboride in Air Flow in a Two-Zone Combustion Chamber
D. A. Yagodnikov1, A. V. Voronetskii1, V. I. Sarab'ev2
1Bauman Moscow State Technical University, Moscow, 105005 Russia
2Federal Research and Production Center “Research Institute of Applied Chemistry”, Sergiyev Posad, 141313 Russia
Keywords: горение, наноразмерный диборид алюминия, пиротехнический состав, воздух, двухзонный рабочий участок, полнота сгорания, combustion, nanoscale aluminum diboride, pyrotechnic composition, air, dual-zone working region, combustion efficiency
Abstract
This paper presents the experimental study of ignition and combustion of micro- and nanoparticles of aluminum diboride as part of pyrotechnic energy-saturated compositions in a gas generator with an air afterburner chamber and the thermodynamic calculations of combustion of pyrotechnic compositions based on aluminum diboride in air. The discharge of the combustion products from the afterburner chamber is recorded on video. It is shown that replacing micron aluminum diboride by powdered diboride with a mass-average diameter of particles equal to ≈270 nm in the pyrotechnic composition and increasing the pressure in the afterburner chamber cause the combustion efficiency in air to increase by 5–20%.
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