Adjoint-based control of the noise from a turbulent mixing layer

Randall R. Kleinman, Jonathan B. Freund

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


We have developed an adjoint-based control methodology that circumvents the complexities in a free shear flow and allows us to study noise control directly. Though it is potentially more general, we have developed and implemented it within a direct numerical simulation (DNS) framework and demonstrated it on a two-dimensional mixing layer. It reduced noise in a target region by over 90%, and allowed us to investigate the subtle flow changes leading to this reduction. Currently, a three-dimensional turbulent mixing layer has been simulated and controlled via the adjoint method. Preliminary results show a corresponding 28% reduction, with simulations ongoing.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Number of pages10
ISBN (Print)1563478099, 9781563478093
StatePublished - 2006
Event12th AIAA/CEAS Aeroacoustics Conference - Cambridge, MA, United States
Duration: May 8 2006May 10 2006

Publication series

NameCollection of Technical Papers - 12th AIAA/CEAS Aeroacoustics Conference


Other12th AIAA/CEAS Aeroacoustics Conference
Country/TerritoryUnited States
CityCambridge, MA

ASJC Scopus subject areas

  • General Engineering


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