Volume 27 Issue 5
May  2012
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YANG Jin-hu, LIU Fu-qiang, XU Gang, ZHU Jun-qiang. Premixed combustion model based on laminar flamelet and presumed beta-PDF[J]. Journal of Aerospace Power, 2012, 27(5): 1005-1014.
Citation: YANG Jin-hu, LIU Fu-qiang, XU Gang, ZHU Jun-qiang. Premixed combustion model based on laminar flamelet and presumed beta-PDF[J]. Journal of Aerospace Power, 2012, 27(5): 1005-1014.

Premixed combustion model based on laminar flamelet and presumed beta-PDF

  • Received Date: 2011-06-13
  • Publish Date: 2012-05-28
  • Based on the laminar flamelet concept and the presumed beta-PDF(probability density function),a turbulent premixed combustion model was studied.In this model,the laminar flamelet calculation was performed with one dimensional free propagation flame code,PREMIX.The results of the laminar flamelet calculation can be formulated as functions of progress variable and then integrated with the presumed beta-PDF,which produced a lookup table.This model was validated with the calculation of the turbulent Bunsen flame for stoichiometric methane.The results were compared with the results of Zimont model and the experiment,which show that the calculation here can appropriately predict the distribution of average velocity.However,the turbulent kinetic energy and temperature are not so well captured and the mean reaction rate is likely overpredicted,which lead to a shorter flame brush.This is likely because of the exclusion of turbulent stretch effect on the flame surface.A model which can account for the effect of turbulent stretch will be explored in future studies.

     

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