Modeling of Liquid Fuel Injection, Evaporation and Mixing in a Gas Turbine Burner Using Large Eddy Simulations |
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Authors: | D Caraeni C Bergström L Fuchs |
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Institution: | (1) Division of Fluid Mechanics, Lund Institute of Technology, S-22100 Lund, Sweden;(2) Division of Fluid Mechanics, Lund Institute of Technology, S-22100 Lund, Sweden |
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Abstract: | The interaction of turbulence, temperature fluctuation, liquid fuel transport, mixing and evaporation is studied by using
Large Eddy Simulations (LES). To assess the accuracy of the different components of the methods we consider first isothermal,
single phase flow in a straight duct. The results using different numerical methods incorporating dynamic Sub-Grid-Scale (SGS)
models are compared with DNS and experimental data. The effects of the interactions among turbulence, temperature fluctuation,
spray transport, evaporation and mixing of the gaseous fuel are studied by using different assumptions on the temperature
field. It has been found that there are strong non-linear interactions among temperature-fluctuation, evaporation and turbulent
mixing which require additional modeling if not full LES is used. The developed models and methods have been applied to a
gas turbine burner into which liquid fuel is injected. The dispersion of the droplets in the burner is described.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | spray injection turbulent mixing and evaporation LES |
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