71th Annual Meeting of the APS Division of Fluid Dynamics (November 18, 2018 — November 20, 2018)

V0092: Shock-Flame interaction with Bubble Explosion

Authors

• Rachel Hytovick, University of Central Florida - Propulsion and Energy Research Laboratory
• Kenji Palavino, University of Central Florida - Propulsion and Energy Research Laboratory
• Jessica Chambers, University of Central Florida - Propulsion and Energy Research Laboratory
• Kareem Ahmed, University of Central Florida - Propulsion and Energy Research Laboratory

DOI: https://doi.org/10.1103/APS.DFD.2018.GFM.V0092

In an effort to experimentally represent interstellar combustion, this video shows a quasi-detonating flame interacting with a reactive bubble to initiate a local deflagration-to-detonation transition (DDT) in an unconfined area. To do so, a spark plug ignites a hydrogen and air mixture which then produces a flame. After going through a series of turbulators, the flame accelerates until it reaches an unconfined box with a reactant bubble inside. By this point, the flame has produced its own shock and compression waves, setting the conditions for DDT. When the shock-flame finally interact with the bubble, just enough turbulence is created to spark the onset of DDT with the unconfined region.