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

V0018: Premixed-flame oscillations in narrow channels

Authors
  • Daniel Martínez-Ruiz, Universidad Politécnica de Madrid
  • Fernando Veiga-López, Universidad Carlos III de Madrid
  • Mario Sánchez Sanz, Universidad Carlos III de Madrid

Propagation of premixed flames in closed vessels is a problem of great importance in science and technological applications. The interaction of the acoustic waves with the reacting front is found widely in power-generation devices, which can compromise their structural integrity. A Hele Shaw cell, of very small thickness, has been used to study the transition of the thermoacoustic oscillations and its dependence on the fuel mixture properties. Two regimes are identified for different values above and below a critical equivalence ratio, which develop strong pulses of the advancing flame and weak oscillations respectively.  

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