Actuator and sensor placement for flow control

Mahesh Natarajan, Jonathan Freund, Daniel J Bodony

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


A new method is developed to estimate effective actuator types and locations for controlling compressible, viscous flows using linear feedback. Based on an analysis of the eigensystem structural sensitivity of the linearized compressible Navier-Stokes operator about a steady baseflow, the forward and adjoint global modes are used to estimate where control actuation would be most effective based upon the eigensystem, and what type of actuation (e.g. mass, momentum, energy) would be most effective. This procedure provides an assessment of actuation effectiveness and the quantities to sense to adjust the actuation. The method is demonstrated for the case of a separated boundary layer in a twodimensional Mach 0.65 diffuser. For sufficiently low Reynolds numbers global stabilization of the flow is achieved, which is confirmed with a direct numerical simulation.

Original languageEnglish (US)
Title of host publicationAIAA AVIATION 2014 -7th AIAA Flow Control Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102929
StatePublished - Jan 1 2014
EventAIAA AVIATION 2014 -7th AIAA Flow Control Conference 2014 - Atlanta, GA, United States
Duration: Jun 16 2014Jun 20 2014


OtherAIAA AVIATION 2014 -7th AIAA Flow Control Conference 2014
Country/TerritoryUnited States
CityAtlanta, GA

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanical Engineering


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