A 3D numerical study of detonation wave propagation in various angled bending tubes

Publication date: November 2016
Source:Fire Safety Journal, Volume 86
Author(s): C. Luo, J. Zanganeh, B. Moghtaderi
This paper conducts a numerical study of detonation wave propagations in 30m and 73m long straight/varying angle bending detonation tubes with inner diameters of 0.5m and 1.05m, respectively, which are filled with varying stoichiometric methane-air mixtures. In the study a 3D numerical model was established by combining a compressible one-step global reaction hot model with the k-ω shear-stress transport (SST) turbulent model. In order to resolve the thin detonation wave front, a dynamically refined mesh near the high pressure gradient is adopted. The initial conditions of the model are obtained from the 1D detonation model. The present model was first verified by comparing the numerical results against the published measurements. The pressure distributions and detonation wave speeds across the tubes and bends were then predicted by using this 3D model.

Graphical abstract

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