COMBUSTION-FRONT MICROSTRUCTURE IN HETEROGENEOUS GASLESS MEDIA (USINGAS AN EXAMPLE THE 5TI+3SI SYSTEM)

A new experimental method for studying the propagation of a gasless co mbustion wave using high-speed microvideo recording, computer recordin g, and processing of video records allowed conditions of existence of a microheterogeneous combustion regime to be determined. A combustion wave propagates chaotically by jumps through samples with porosity of 45-50% and higher. During the delay between the jumps, the nest sample layer (or unit cell) is heated. The heating-zone size is close to the sample particle size (similar to 100 mu m). For denser samples, this process is described by the classical equations of propagation of a ho mogeneous combustion wave. In this case, the sizes of the heating and reaction zones are much larger than the particle size.