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Active Flow-Separation Control on a High-Lift Wing-Body Configuration

Ciobaca, Vlad and Kühn, Timo and Rudnik, Ralf and Bauer, Matthias and Gölling, Burkhard and Breitenstein, Wiebke (2013) Active Flow-Separation Control on a High-Lift Wing-Body Configuration. Journal of Aircraft (2013, ), pp. 56-72. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C031659 ISSN 0021-8669

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Abstract

This contribution discusses the implementation of active flow-separation control for a three-dimensional high-lift wing-body configuration under atmospheric low-speed wind-tunnel conditions. The slot actuators are applied on the suction side of the trailing-edge flap to prevent local flow separation. The experimental results indicate that the pulsed blowing flow control technique is effective on the present configuration with a global performance enhancement. Numerical investigations are the focus of this article. The baseline case is characterized by substantial portions of separated flow. Thus, the influence of grid resolution and turbulence modeling is investigated. Based on this an intermediate mesh in combination with the Shear Stress Transport model gives the best compromise between quality and computational turnaround times. The steady Reynolds Averaged Navier Stokes (RANS) calculations carried out with constant blowing demonstrate the feasibility to simulate active flow control concepts. The key flow control method is the pulsed blowing. The verification of the unsteady RANS approach with active flow control shows that high computational resources are required for consistent numerical evaluations. The computational results highlight the ability of pulsed blowing at moderate blowing momentum coefficients to suppress the flow separation on the trailing-edge flap. The numerical results show an acceptable agreement with the experiments.

Item URL in elib:https://elib.dlr.de/81234/
Document Type:Article
Title:Active Flow-Separation Control on a High-Lift Wing-Body Configuration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ciobaca, VladUNSPECIFIEDUNSPECIFIED
Kühn, TimoUNSPECIFIEDUNSPECIFIED
Rudnik, RalfUNSPECIFIEDUNSPECIFIED
Bauer, MatthiasUNSPECIFIEDUNSPECIFIED
Gölling, BurkhardUNSPECIFIEDUNSPECIFIED
Breitenstein, WiebkeUNSPECIFIEDUNSPECIFIED
Date:January 2013
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.2514/1.C031659
Page Range:pp. 56-72
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0021-8669
Status:Published
Keywords:active flow control; high-lift; 3D wing-body configuration; URANS
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 - Simulation & Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Ciobaca, Vlad
Deposited On:22 Feb 2013 13:53
Last Modified:08 Mar 2018 18:41

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