Allumage et Propagation brûleur à brûleur

Versions

Le 04/07/2014

Bruno Renou  •  ico

Gilles Cabot  •  ico

Purpose

These burners come from the European program (FP7) KIAI and are dedicated to the experimental study of ignition phenomena in confined swirled flows, operating in gaseous or two-phase flows. The operating conditions are relevant to aeronautical conditions, and the different steps of ignition (flame kernel ignition, ignition and flame stabilization at the exit of the first injector, and light around) can be studied accurately by means of spatially and temporally resolved optical diagnostics.

The first burner consists of one swirled injector, and ignition can be performed at different locations within the combustion chamber, in order to :

  • Evaluate the optimal spark location to achieve an efficient burner ignition,
  • Understand the ignitions mechanisms (influence of local conditions : turbulence, mixing, … ; flame kernels trajectories, ignition scenario),
  • Achieve extended and accurate experimental databases for a relevant validation of CFD codes (R&D) dedicated to the design of aeronautical combustion chambers.

The second burner is made of 5 injectors (similar to the previous one) with a variable distance between two-successive injectors. This facility can lead to identify the impact of this distance (which is a critical parameter for the combustion chamber design) on the mechanism of light around. In the next studies, we expect to evaluate also the effects of Kerosene spray and relighting in high altitude conditions (low pressure, and low temperature) in order to be much closer to real conditions. These experimental studies are also carried out with the objective to provide open databases to allow a joint analysis of these phenomena with LES numerical simulations (AVBP or YALES 2).

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MàJ ··· 19 novembre 2019

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