Experimental investigation of deflagration to detonation transition in hydrocarbon-air gaseous mixtures

✍ Scribed by Nickolay N. Smirnov; Michael V. Tyurnikov

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 929 KB
• Volume: 100
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(94)00151-h

✦ Synopsis

The paper presents the results of investigation of deflagration to detonation transition in gas mixtures with exothermic chemical reaction using the experimental method of nonintrusive diagnostics of the process. Schlieren photochronography in the optical sections in different places of the tube is performed using the laser as a source of light. Experimental results of visualization of the transition process in hydrocarbon-air gas mixtures show several different flow patterns: (1) The detonation wave originates in the flame zone. ( ) The detonation wave originates between the flame zone and primary shock wave. (3) The secondary combustion zone originates between primary shock and the flame and causes the detonation. ( ) Spontaneous flame occurs that leads to the combustion to detonation transition. The influence of the flame zone on the originating strong detonation wave is noticed.