Adjoint-based sensitivity analysis of ignition in a turbulent reactive shear layer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The uncertainty of successful ignition in non-premixed turbulent flows remains a fundamental challenge in many practical combustion systems. Mapping the spatial distribution of ignition probability often relies on iterative testing that becomes prohibitive when measuring sensitivity to a large number of parameters or varied flow conditions. An accelerated approach is to formulate the adjoint of the perturbed and linearized governing equations in such a way that sensitivity of an ignition indictor to an arbitrarily large number of parameters can be obtained with a cost comparable to the flow solution. The purpose of the present study is to demonstrate the capability of an adjoint solution to inform parametric uncertainty and optimal ignition placement in turbulent non-premixed combustion. Direct numerical simulations of assisted ignition in a non-premixed hydrogen-air mixing layer are presented. Adjoint-based sensitivity of ignition likelihood to placement of the igniter are reported for different flow realizations.

Original languageEnglish (US)
Title of host publicationAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624104473
DOIs
StatePublished - Jan 1 2017
Event55th AIAA Aerospace Sciences Meeting - Grapevine, United States
Duration: Jan 9 2017Jan 13 2017

Publication series

NameAIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting

Other

Other55th AIAA Aerospace Sciences Meeting
CountryUnited States
CityGrapevine
Period1/9/171/13/17

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ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Capecelatro, J., Bodony, D. J., & Freund, J. B. (2017). Adjoint-based sensitivity analysis of ignition in a turbulent reactive shear layer. In AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting [AIAA 2017-0846] (AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2017-0846