Visualization of thermal diffusion instability of a combustion wave in Zeldovich-Barenblatt parameter

Abstract

The study of the thermal structure of the combustion wave of self-propagating high-temperature synthesis using differential chronoscopy (DCS), using the example of the Ni-Al system, demonstrates the possibility of estimating the criterion of thermal diffusion instability of the front in accordance with the Zeldovich-Barenblatt model. Application of standard image recognition methods, in the form of a high-speed Trace-transform algorithm, to a 2D chronogram of the interframe difference in the coordinates of the combustion front, calculated from high-speed video recording of the propagation of a CBC wave as a DCS-map, demonstrates the ability to control the sustainability mode of the burning wave in situ.