Comparison of Deflagration-to-Detonation Transition (DDT) Experimental Results with Computational Fluid Dynamics (CFD) Predictions

摘要

Previous experiments on DDT have focused on the uniform distribution of obstacles; however, facilities are not uniformly organized. For instance, there are pumps, pipe racks, vessels, reactors, heat exchangers, etc. that introduce different blockages and have a significant effect on the flame acceleration that can lead to a deflagration-to-detonation transition. Therefore, this research aims to determine the effect that the non-uniform distribution of obstacles (e.g., obstacles' shape, blockage ratio and obstacles' distribution) has on the distance necessary to obtain DDT. This was done experimentally with a detonation tube and numerically by using FLACS as the CFD model. The experimental results suggest that the non-uniform distribution of obstacles affects the flame acceleration and, consequently, the run-up distance to obtaining DDT, the pressure magnitude and the general propagation of the detonation wave throughout the detonation tube. This was also observed in the numerical results obtained in FLACS.