ID#: 13
Abstract Title: Interaction between Shock and Detonation Waves
Session Title: Cellular Structure II
Session Date: 7/30/01
Session Start Time: 11:20 AM
Contributing Author: Terao, K.
Organization: Yokohama National University
Country: Japan
Authors: Kunio Terao, Takayuki Yoshida, Kazuaki Kishi, Kazuhiro Ishii
Short Abstract: Detonation waves propagating in a stoichiometric propane-oxygen mixture at the collision with shock waves are investigated, by observation of their propagation velocity and cellular structure recorded on a soot film. The experimental results suggest that the propagation velocity increases after the shock collision, while the Mach number decreases, and the cellular pattern becomes finer. The probability of apex formation in the cellular structure depends on the temperature and density of the mixture behind the shock waves at the detonation front. The apex formation probability is moreover equal to the probability of spontaneous ignition in the same mixture under the same condition. It is thus concluded that the cellular structure is formed by the spontaneous ignition and the gas flow behind the shock waves at the detonation front.