Monitoring of Nanopowder Combustion Ignited by Laser Radiation

The paper presents the results of real time observing the process of combustion in air of nano- and coarsely dispersed aluminum powders ignited by laser radiation. The obtained results convincingly evidence the possibility and perspective of visualizing the ignition process by means of laser monitor. The video images allow observing the main stages of the combustion process including starting of combustion in the place of the laser radiation focusing, spreading of the heat wave and the appearance of the second combustion wave. By calculating average intensity of images registered by the laser monitor it is possible to numerically characterize the combustion process and compare the different samples combustion.