Publicado 6 números por año
ISSN Imprimir: 2150-766X
ISSN En Línea: 2150-7678
Indexed in
SCHLIEREN METHOD OF OPTICAL REGISTRATION OF COMBUSTION TO DETONATION TRANSITION IN GASEOUS MIXTURES
SINOPSIS
This paper presents an experimental method of non-intrusive diagnostics of combustion-to-detonation transition in gas mixtures with an exothermic chemical reaction. Schlieren photochronography is performed in the optical sections in different parts of the tube using laser as a source of light. Experimental results of visualization of transition process in hydrocarbon-air gas mixtures show several different flow patterns: 1. detonation wave originates in the flame zone, 2. detonation wave originates between the flame zone and the primary shock wave, 3. secondary combustion zone originates between the primary shock and the flame and causes detonation, and 4. spontaneous flame that occurs leads to combustion-to-detonation transition. The influence of the flame zone on the originating strong detonation wave is noted.