Some Recent Experimental Studies of Transition to Detonation in Gaseous Mixtures

Tuesday, November 9, 1999 - 11:00am - 12:00pm
Keller 3-180
Geraint Thomas (University of Wales)
The paper will report the results of recent experimental observations of flame acceleration and possible subsequent transition to detonation. The experiments include macroscopic field-scale observations of flame acceleration and onset of detonation in a straight pipe as well as more detailed laboratory based observations of shock-flame interaction and flame growth following direct ignition of gases at elevated temperatures. Based on these observations, and supporting numerical computations, the paper concludes with a discussion of the nature of transition to detonation in gases. Parallels are also drawn with some observations of deflagration to detonation transition in solid explosives.