Abstract
In this study, oxyhydrogen detonation driven miniature shock tubes have been numerically investigated by solving two-dimensional compressible Navier-Strokes equations with reaction modeling of oxyhydrogen combustion, using open source deflagration to detonation solver ‘ddtFoam’at OpenFOAM platform. Three miniature shock tubes have been studied with width of 2 mm, 6 mm and 100 mm and have driver and driven side lengths as 100 mm and 334 mm, respectively. The driver side is filled with particular fill pressure of oxyhydrogen stoichiometric mixture on top of atmospheric air. Initial simulations are performed for driver side tube in forward driven detonation mode to build high pressure and temperature before diaphragm, with wall boundary in driver tube. Further driven tube at atmospheric air with dump region are included at certain time by removing diaphragm wall of driver tube assuming instantaneous diaphragm rupture. Flame and compression waves propagation have been analyzed by monitoring area averaged pressure at several locations. For 6 mm with shock tube, the shock speed at the end of driven tube is compared with experimental data available in literature. It is found that in miniature shock tubes, viscous effects can be highly dominant which are not resolved in current study. However, the qualitatively wave propagations and their interactions can be studied in comparative manner.
| Original language | Undefined/Unknown |
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| Title of host publication | 5th National Symposium on Shock Waves, TBRL, Chandigarh, INDIA Feb 26-28, 2018 |
| Publication status | Published - 26 Feb 2018 |