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Inertial Particles in a Turbulent Premixed Bunsen Flame

  • F. Battista
  • F. Picano
  • G. Troiani
  • C. M. Casciola
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)

Abstract

Many fields of engineering and physics are characterized by reacting flows seeded with particles of different inertia and dimensions, e.g. solid-propellant rockets, reciprocating engines where carbon particles form due to combustion, vulcano eruptions. Particles are also used as velocity transducers in Particle Image Velocimetry (PIV) of turbulent flames. The effects of combustion on inertial particle dynamics is still poorly understood, despite its relevance for its effects on particle collisions and coalescence, phenomena which have a large influence in soot formation and growth [1]. As a matter of fact, the flame front induces abrupt accelerations of the fluid in a very thin region which particles follow with different lags depending on their inertia. This phenomenon has a large impact on the particle spatial arrangement. The issuing clustering is here analyzed by a DNS of Bunsen turbulent flame coupled with particle Lagrangian tracking with the aim of evaluating the effect of inertia on particle spatial localization in combustion applications. The Eulerian algorith is based on Low-Mach number expansion of Navier-Stokes equations that allow arbitrary density variations neglecting acoustics waves, for detail see [4].

Keywords

Particle Image Velocimetry Soot Formation Inertial Particle Turbulent Flame Cluster Index 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Hu, B., Yang, B., Koylu, U.O.: Soot measurements at the axis of an ethylene/air non-premixed turbulent jet flame. Comb. and Flame 134(1-2), 93–106 (2003)CrossRefGoogle Scholar
  2. 2.
    Kostinski, A.B., Shaw, R.A.: Scale-dependent droplet clustering in turbulent clouds. J. Fluid Mech. 434(-1), 389–398 (2001)zbMATHGoogle Scholar
  3. 3.
    Maxey, M.R., Riley, J.J.: Equation of motion for a small rigid sphere in a nonuniform flow. Phys. Fluids 26(4), 883 (1983)zbMATHCrossRefGoogle Scholar
  4. 4.
    Picano, F., Battista, F., Troiani, G., Casciola, C.M.: Dynamics of PIV seeding particles in turbulent premixed flames. Experiments in Fluids, 114 (2010)Google Scholar
  5. 5.
    Stella, A., Guj, G., Kompenhans, J., Raffel, M., Richard, H.: Application of particle image velocimetry to combusting flows: design considerations and uncertainty assessment. Experiments in Fluids 30, 167–180 (2001)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • F. Battista
    • 1
  • F. Picano
    • 1
  • G. Troiani
    • 2
  • C. M. Casciola
    • 1
  1. 1.Dipartimento di Meccanica e AeronauticaUniversità SapienzaRomeItaly
  2. 2.ENEA C.R. CasacciaRomaItaly

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