Structure of detonation waves in mixtures of tetranitromethane with acetone

The structures of detonation waves in mixtures of tetranitromethane with acetone was studied in experiments using a VISAR interferometer and a NANOGATE-22 electron-optical camera. At a diluent concentration of 10–40%, there was a sharp change in the flow in the reaction zone, manifested in a decrease in the amplitude of the von Newman spike up to its complete disappearance. Detonation waves are stable in almost the entire range of concentrations, except in the range near the limiting value of 52%. In approaching the limiting concentration, the waves become unstable, which is manifested in the formation of both the cellular structure of the front and reaction failure waves. The obtained experimental dependences of the detonation velocity on acetone concentration are in good agreement with thermodynamic calculations.