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Using adjoint-based optimization to enhance ignition in non-premixed jets.


ABSTRACT: Gradient-based optimization is used to reliably and optimally induce ignition in three examples of laminar non-premixed mixture configurations. Using time-integrated heat release as a cost functional, the non-convex optimization problem identified optimal energy source locations that coincide with the stoichiometric local mixture fraction surface for short optimization horizons, while for longer horizons, the hydrodynamics plays an increasingly important role and a balance between flow and chemistry features determines non-trivial optimal ignition locations. Rather than identifying a single optimal ignition location, the results of this study show that there may be several equally good ignition locations in a given flow configuration.

SUBMITTER: Qadri UA 

PROVIDER: S-EPMC7897636 | biostudies-literature |

REPOSITORIES: biostudies-literature

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