DDT experiments (KIT Sample Clauses

DDT experiments (KIT. ‌ Table 9.1. Deflagration to detonation transition experiments contained in the model validation database. id Experiment name Short description 17 ▇▇▇▇ Experiment Explosion experiments with hydrogen in straight pipes of 3 different diameters (all with L/D = 98) were carried out, for the 6”/15 m pipe, 6 different gas concentrations were applied. 18 FZK-R 049809 Combustion experiments have been carried out in an obstructed tube of 350 mm diameter and 12 m in length. Repeatable obstacles with blockage ratio BR=0.3 at distances 500 mm. Hydrogen-air mixture with H2 concentration of 15% by volume was tested. 39 MiniRUT Processes of fast deflagration and DDT were studied in an obstructed channel and in a chamber called MiniRUT using high-speed shadow photography, pressure transducers, and photodiodes. A regime of DDT was observed in the channel, which showed detonation origin in a zone between the lead shock and turbulent flame brush of propagating fast deflagration. Detonation onset in the chamber resulted either from Mach reflection of lead shocks, or shock focusing in a corner. Critical mixture compositions for onset of detonations were determined. The detonation cell size was confirmed as a reliable scaling parameter for characterization of detonation onset conditions. 42 GRS029 This DDT experiment was carried out in a semi confined volume of size 9x3x0.3m, inside the facility repeating 53% block ratio obstacles were installed for the flame acceleration. The experiment facility was filled with 23% hydrogen-air mixture, and the burnable gas was ignited by a 2m flame tube. 43 GRS037 This DDT experiment was carried out in a semi confined volume of size 9x3x0.6m, inside the facility repeating 50% block ratio obstacles are installed for the flame acceleration. The experiment facility was filled with 22% hydrogen-air mixture, and the burnable gas was ignited by a 2m flame tube. 44 GRS056 This DDT experiment was carried out in a semi confined volume of size 9x3x0.6m, inside the facility repeating 50% block ratio obstacles are installed for the flame acceleration. The experiment facility was filled with gradient hydrogen-air mixture (at the top the concentration of hydrogen is 21.8% and the concentration decreases by 0.3% per cm), and the burnable gas was ignited by a 2m flame tube. 45 GRS057 This DDT experiment was carried out in a semi confined volume with size of 9x3x0.6m, inside the facility repeating 50% block ratio obstacles are installed for the flame accelera...