Atmospheric Low Swirl Burner Flow Characterization with Stereo PIV Articles uri icon

publication date

  • May 2010

start page

  • 901

end page

  • 913

issue

  • 5

volume

  • 48

international standard serial number (ISSN)

  • 0723-4864

electronic international standard serial number (EISSN)

  • 1432-1114

abstract

  • The lean premixed prevaporized (LPP) burner concept is now used in most of the new generation gas turbines to reduce flame temperature and pollutants by operating near the lean
    blow-off limit. The common strategy to assure stable combustion is to
    resort to swirl stabilized flames in the burner.
    Nevertheless, the vortex breakdown phenomenon in reactive swirling flows
    is a very complex 3D mechanism, and its dynamics are not yet
    completely understood. Among the available measurement techniques
    to analyze such flows, stereo PIV (S-PIV) is now a reliable
    tool to quantify the instantaneous three velocity components in
    a plane (2D&-3C). It is used in this paper to explore the
    reactive flow of a small scale, open to atmosphere, LPP burner (50 kW).
    The burner is designed to produce two distinct topologies
    (1) that of a conventional high swirl burner and (2) that of a low
    swirl burner. In addition, the burner produces a lifted
    flame that allows a good optical access to the whole recirculation
    zone in both topologies. The flow is studied over a wide
    range of swirl and Reynolds numbers at different equivalence ratios.