2D Model Identifies Flame Jet Geometry as Trigger for DDT Onset in Unconfined Fuel-Air Clouds
The paper supplies a minimal 2D mechanism explaining how a flame jet from a narrow tube triggers DDT in unconfined clouds. It connects 1985 experiments to concrete industrial hazards. Validation requires 3D simulations and new large-scale tests.
Related work on vapor-cloud explosions at Buncefield (2005) and Jaipur (2009) documented similar jet-like flows from partially confined spaces preceding catastrophic detonations. The present formulation supplies the missing first-principle link between those flows and DDT. Next steps include three-dimensional extension with detailed kinetics and direct comparison against new large-scale jet experiments planned for 2027.
Kagan: Full 3D simulations with detailed chemistry will reproduce DDT for jet exit velocities above 80 m/s within 5 ms by end of 2027
Sources (2)
- [1]Primary Source(https://arxiv.org/abs/2606.23900)
- [2]Supporting Source(https://doi.org/10.1016/0010-2180(85)90106-3)