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Active Flow Control on a High-Lift Airfoil: URANS Simulations and Comparison with Time-Accurate Measurements

Ciobaca, Vlad and Rudnik, Ralf and Huacke, Frank and Nitsche, Wolfgang (2013) Active Flow Control on a High-Lift Airfoil: URANS Simulations and Comparison with Time-Accurate Measurements. 31st AIAA Applied Aerodynamics Conference, June 24-27, 2013, San Diego, CA.

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Official URL: http://arc.aiaa.org/doi/book/10.2514/MAPA13

Abstract

This paper presents a validation of unsteady computational results for active separation control with time-averaged and time-accurate wind tunnel measurements. The selected method to control the flow separation on multi-element airfoils resembles a pulsed blowing with a squared signal at moderate energy requirements. The focus is on controlling a large trailing edge flap separation for an overall high-lift enhancement. These studies were performed to show the ca- pability to simulate the complex physical processes and to deliver the possible shortfalls for this numerical method. The studies address double-slot actuators and corresponding three-dimensional simulations are performed. The approach is based on solving the Reynolds-averaged Navier-Stokes equations for modeling time-dependent physical problems with the objective to explore the relevant mean and unsteady aerodynamic characteristics for (state of the art) high-lift airfoils with flow control. The computed aerodynamic lift coecients, sectional pressure distributions and time-resolved flowfield visualizations are compared with wind tunnel experiments. In general, a good agreement is observed that underlines the applicability of this numerical method for unsteady flow control applications. Two state of the art eddy viscosity turbulence models are used and significant differences in the computed flowfield are reported for the flow control simulation, but not for the baseline.

Item URL in elib:https://elib.dlr.de/83614/
Document Type:Conference or Workshop Item (Paper)
Title:Active Flow Control on a High-Lift Airfoil: URANS Simulations and Comparison with Time-Accurate Measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ciobaca, Vladvlad.ciobaca (at) dlr.deUNSPECIFIED
Rudnik, Ralfralf.rudnik (at) dlr.deUNSPECIFIED
Huacke, Frankfrank.haucke (at) ilr.tu-berlin.deUNSPECIFIED
Nitsche, Wolfgangwolfgang.nitsche (at) ilr.tu-berlin.deUNSPECIFIED
Date:June 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:AFC, Flow Control, URANS, Time-Resolved PIV, High-Lift
Event Title:31st AIAA Applied Aerodynamics Conference
Event Location:San Diego, CA
Event Type:international Conference
Event Dates:June 24-27, 2013
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Ciobaca, Vlad
Deposited On:09 Aug 2013 13:15
Last Modified:12 Dec 2013 22:09

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