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Diagnostics of Strongly Turbulent Premixed Flames Based on Direct Numerical Simulations

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[Technical Report, Final Report]

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The objective of the proposed research is to understand the structure and propagation mechanisms of strongly turbulent premixed flames relevant to high speed propulsion applications. The objective is achieved through computational diagnostics of limit flame phenomena, including local ignition and extinction, and other critical flame features, such as premixed reaction fronts and the associated propagation speed, by using the chemical explosive mode analysis CEMA on turbulent flames simulated with direct numerical simulations DNS. Progress has been made in the following tasks during the reporting period no cost extension 1 Developed and validated the deeply reduced kinetic model for JP10 specific to extinction problems based on HyChem, 2 Systematic generation and solution of reactor network models RNM based on computational fluid dynamics CFD results, and 3 Investigation of chemical kinetic uncertainties propagating in turbulent flames based on 2-DDNS.

Subject Categories:

  • Numerical Mathematics
  • Cybernetics

Distribution Statement:

[A, Approved For Public Release]