ID#: 63
Abstract Title: Correlation between Dynamics and Chemical Kinetics Parameters in Detonation Waves
Session Title: Detonation Chemistry
Session Date: 7/31/01
Session Start Time: 2:00 PM
Contributing Author: Lefebvre, M.H.
Organization: Polytechnique Institute - Rma
Country: Belgium
Authors: L. Desweemer, L. Thill, M.H. Lefebvre, P.J. Van Tiggelen
Short Abstract: The work focuses on the correlation between experimental properties of gaseous detonation waves, namely the ratio of the length of the cellular structure (L) and the mean wave velocity (D), and the calculated mean induction time (tind). The ratio L/D represents the period of the detonation wave. Previous workers have noticed a linear correlation between the induction time and this ratio. However, the correlation factor seems not to be universal and depends sometimes on the chemical composition of the reactive mixture. Moreover, close to the detonation limits, the simple linear relation does not stand anymore. In this work, we try to elaborate more on the relationship between all these parameters. Experimental evidences and calculations lead to the definition of two types of detonation failure: a dynamics and a chemical kinetics failure. The paper investigates these correlations for detonation waves at various initial conditions, namely: - variable equivalence ratio of the mixture with different initial pressures, - variable inhibitor content with different fuel compositions, and - various initial pressures in three different tube cross-sections, including rectangular and diagonal types of detonation waves.