Active flow control on bluff bodies with distinct separation locations

P. Kjellgren, D. Cerchie, L. Cullen, I. Wygnanski

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

3 Scopus citations


Active flow control (AFC) studies are currently in progress at The University of Arizona utilizing both computational and experimental efforts aimed at optimizing the parameters affecting pressure drag. The two-dimensional wind tunnel tests and numerical models use existing tilt-rotor airfoils in their representative aircraft hover orientation to the flow as the test articles. Zero mass-flux oscillatory blowing through slots at various locations on the airfoil achieves significant reduction in download. For the numerical simulations, a semi-implicit finite element solver with unstructured mesh capability was used for the threedimensional, time-dependent flow fields. Two large eddy simulation (LES) turbulence models were used; the constant and also the dynamic coefficient Smagorinsky models. Various numerical resolutions for the forcing slot as well as the computational domain were tested. The airfoil configuration, actuators and slot parameters affecting the interaction of the forced shear layer with the downstream wake continue to be investigated. The results show the impact of each of these control parameters on the flow field and the resulting download. Planned studies will further refine this understanding with the goal of achieving a significant download reduction using the optimum or minimum actuator requirement.

Original languageEnglish (US)
Title of host publication1st Flow Control Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624101052
StatePublished - 2002
Externally publishedYes
Event1st Flow Control Conference 2002 - St. Louis, MO, United States
Duration: Jun 24 2002Jun 26 2002

Publication series

Name1st Flow Control Conference


Other1st Flow Control Conference 2002
Country/TerritoryUnited States
CitySt. Louis, MO

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Aerospace Engineering
  • Control and Systems Engineering


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