The combustion of a shock-dispersed-fuel charge consisting of 1-g flake Al in 6.6-, 21.5-, and 40.5-liter bomb calorimeters were investigated. Wall pressure histories were used to diagnose the effect of energy release due to turbulent mixing and combustion of the explosion cloud with air. These effects lead to a factor of four increase in the peak quasistatic pressure for the 6.6-liter chamber. Pressure decay was observed at late times and was ascribed to energy losses to the walls due to radiation heat transfer

Assessment of a flame surface density-based subgrid turbulent combustion model for nonpremixed flames of wood pyrolysis gas Abstract. Shock-induced dissemination and burning of aluminum particles in air is numerically simulated using the equilibrium chemistry approach for describing the equation of state of reacting two-phase media. Since the initial mixture is non-premixed it was necessary to develop a new model. Its predictive abilities and advantages are demonstrated.

Indoor detonations in buildings with several linked rooms present an important and complex problenL Experimental StudieS in small-Scale models using Nitropenta charges of O.5-g have been performed to obtain a database for indoor detonations in a multi-chamber system. Floor and ceiling of the model consist of a transparent materiaL This made it possible to visualize the flow field inside the structureS Pressure gages were installed in all rooms.The paper discusses the influence of the charge position as well as effects of venting holes in the detonation chamber. It also focuses on characteristics of the energy release and the related pressure effects if the system contains an inflammable material and the detonation provides mixing with air and initiates combustion.

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