Numerical investigation of turbulent separation control using periodic disturbances

Daniel M. Israel, Hermann F. Fasel

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations


The new Flow Simulation Methodology (FSM) proposed by Speziale (1997) is applied to the separation control experiments of Seifert and Pack (1999). By smoothly ramping between RANS and LES based on the local flow conditions, the FSM allows simulations which capture the unsteady nature of the shear layer without requiring LES resolution in the boundary layer. This makes the FSM ideal for investigations of Active Flow Control (AFC). In the experiments a model simulating the upper surface of a 20% thick airfoil was mounted on the side of a wind tunnel. The flow over this airfoil separates at ~ 64% chord if no control is applied. This model was used to investigate sweep and compressibility effects over a range of Reynolds numbers. The goal of our ongoing research is to implement and validate the FSM in an high-order accurate CFD code capable of simulating these experiments. In this paper we demonstrate the FSM for the experimental geometry with a fully turbulent boundary layer at the domain inflow. The calculations show that the FSM does allow the formation of unsteady structures in the separated region.

Original languageEnglish (US)
StatePublished - 2002
Event40th AIAA Aerospace Sciences Meeting and Exhibit 2002 - Reno, NV, United States
Duration: Jan 14 2002Jan 17 2002


Other40th AIAA Aerospace Sciences Meeting and Exhibit 2002
Country/TerritoryUnited States
CityReno, NV

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering


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