ID#: 33
Abstract Title: Quenching of Gas Detonation in Tube by Injection of Inert Gas
Session Title: Poster Session I
Session Date: 7/31/01
Session Start Time: 2:50 PM
Contributing Author: Teodorczyk, A.
Organization: Warsaw University of Technology
Country: Poland
Authors: A.Dabkowski, A.Kozak, A.Teodorczyk
Short Abstract: The effectiveness of an inert gas or fire-fighting agent in suppressing detonation can be rated by the extent to which it decelerates the propagating wave and simultaneously attenuates the hazardous shock wave, which is always ahead of the flame in the decoupled quenched detonation. The objective of this study was to examine the influence of inert zone created dynamically prior to ignition in combustible mixture on detonation propagation and attenuation. Four inert agents: He, Ar, N2 and CO2, and one fire inhibiting agent: C4F10 (FC3110), were used in the experiments. The effectiveness of all suppressants under study was evaluated on the basis of performance parameters defined as the ratio of velocity and pressure reduction in comparison with baseline case of non-inhibited detonation. It was shown that injection of inert gas can be an effective method of suppressing detonation in tube. In this study the critical conditions for detonation attenuation for different inert gases were determined. It was found that effectiveness of inert gas increases with its molecular weight.