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A new piloted premixed jet burner to study strong finite-rate chemistry effects

Dunn, Matthew J ; Masri, Assaad R ; Bilger, Robert W

Combustion and Flame, 2007, Vol.151(1), pp.46-60 [Periódico revisado por pares]

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  • Título:
    A new piloted premixed jet burner to study strong finite-rate chemistry effects
  • Autor: Dunn, Matthew J ; Masri, Assaad R ; Bilger, Robert W
  • Assuntos: Premixed Flames ; Turbulent ; Finite-Rate Chemistry ; Premixed Flames ; Turbulent ; Finite-Rate Chemistry ; Engineering ; Chemistry
  • É parte de: Combustion and Flame, 2007, Vol.151(1), pp.46-60
  • Descrição: This paper describes the initial characterization of a piloted premixed jet burner (PPJB) designed to investigate finite-rate chemistry effects in highly turbulent lean premixed combustion. The PPJB consists of a high-velocity lean premixed central jet, piloted by a low-velocity stoichiometric premixed pilot, surrounded by a large-diameter coflow of lean premixed hydrogen–air combustion products. The configuration of a lean central jet supported by a stoichiometric pilot is similar to that of a lean premixed gas turbine combustor, but without additional complications such as swirl, recirculation, and complex boundary conditions. A significant feature of the PPJB is that under certain conditions the central jet combustion process appears to undergo an extinction–reignition process. It is considered likely that intense turbulent mixing after the nozzle drives an initial extinction process that reduces flame luminosity, with reignition occurring downstream where turbulent mixing...
  • Idioma: Inglês

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