77th Annual Meeting of the APS Division of Fluid Dynamics (November 24, 2024 — November 26, 2024)

P2691381: Blast-Induced Flame Tip Shedding

Authors
  • Akhil Aravind, Indian Institute of Science, Bengaluru, India
  • Gautham Vadlamudi, Indian Institute of Science Bangalore
  • Saptarshi Basu, Indian Institute of Science, Bengaluru, India
DOI: https://doi.org/10.1103/APS.DFD.2024.GFM.P2691381

As the blast wave sweeps across the non-premixed jet flame along the fuel jet axis, it imposes an unsteady velocity profile, marked by a sharp discontinuity, followed by a rapid decay. While the jet flame exhibits a minor jittery response to the blast front, it shows a significant lift-off following its interaction with the induced flow that follows the blast wave. Contingent on the operating conditions of fuel jet Reynolds number and incident Blast wave Mach number, the interaction can result in flame tip shedding, which is a consequence of aggravated shearing across the density boundary between the hot product gases and the ambient air. (Scale: Nozzle size: 2 mm)

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