In situ nanopowder combustion visualization using laser systems with brightness amplification

L. Li, A. V. Mostovshchikov, A. P. Ilyin, P. A. Antipov, D. V. Shiyanov, F. A. Gubarev

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we report on an experimental demonstration of a new technique for real-time monitoring of the air combustion of aluminum-based nanopowders and mixtures. An optical system having a brightness amplifier is used for sample-surface imaging during high-temperature combustion. The main advantage of the laser-monitor application, compared with direct high-speed imaging, is the possibility of seeing through the intense glowing of a burning sample. Furthermore, the proposed laser monitor has an increased monitoring distance compared with known systems, which is provided by a mirror-imaging scheme applied to the laser monitor. The proposed technique allows real-time monitoring of high-temperature combustion processes accompanied by intensive lighting and product scattering at a distance of up to 50 cm from the optical system. The operation of the optical system is tested using both a quietly burning aluminum nanopowder and aluminum-based explosive mixtures. The combustion of a nanoAl+µAl+µFe powder mixture and aluminized blended propellant is visualized using a laser monitor for the first time.

Original languageEnglish
JournalProceedings of the Combustion Institute
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • Aluminum nanopowder
  • Brightness amplifier
  • High-temperature combustion
  • Solid propellant
  • Surface imaging

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Physical and Theoretical Chemistry

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