Active control for turbulent premixed flame simulations

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Many turbulent premixed flames of practical interest are statistically stationary. They occur in combustors that have anchoring mechanisms to prevent blow-off and flashback. The stabilization devices often introduce a level of geometric complexity that is prohibitive for detailed computational studies of turbulent flame dynamics. As a result, typical detailed simulations are performed in simplified model configurations such as decaying isotropic turbulence or inflowing turbulence. In these configurations, the turbulence seen by the flame either decays or, in the latter case, increases as the flame accelerates toward the turbulent inflow. This limits the duration of the eddy evolutions experienced by the ... continued below

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Bell, John B.; Day, Marcus S.; Grcar, Joseph F. & Lijewski, Michael J. March 26, 2004.

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Many turbulent premixed flames of practical interest are statistically stationary. They occur in combustors that have anchoring mechanisms to prevent blow-off and flashback. The stabilization devices often introduce a level of geometric complexity that is prohibitive for detailed computational studies of turbulent flame dynamics. As a result, typical detailed simulations are performed in simplified model configurations such as decaying isotropic turbulence or inflowing turbulence. In these configurations, the turbulence seen by the flame either decays or, in the latter case, increases as the flame accelerates toward the turbulent inflow. This limits the duration of the eddy evolutions experienced by the flame at a given level of turbulent intensity, so that statistically valid observations cannot be made. In this paper, we apply a feedback control to computationally stabilize an otherwise unstable turbulent premixed flame in two dimensions. For the simulations, we specify turbulent in flow conditions and dynamically adjust the integrated fueling rate to control the mean location of the flame in the domain. We outline the numerical procedure, and illustrate the behavior of the control algorithm. We use the simulations to study the propagation and the local chemical variability of turbulent flame chemistry.

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OSTI as DE00838048

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  • Western States Section of the Combustion Institute 2004 Spring Meeting, Davis, CA (US), 03/29/2004--03/30/2004

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  • Report No.: LBNL--54766
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 838048
  • Archival Resource Key: ark:/67531/metadc783576

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 26, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • April 1, 2016, 8:34 p.m.

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Bell, John B.; Day, Marcus S.; Grcar, Joseph F. & Lijewski, Michael J. Active control for turbulent premixed flame simulations, article, March 26, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc783576/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.