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Steady Aerodynamics of Miniature Trailing-Edge Devices in Transonic Flows

Richter, Kai and Rosemann, Henning (2012) Steady Aerodynamics of Miniature Trailing-Edge Devices in Transonic Flows. Journal of Aircraft, 49 (3), pp. 898-910. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.C031563. ISSN 0021-8669.

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Official URL: http://www1.aiaa.org/content.cfm?pageid=318


The steady aerodynamic effect of miniature trailing-edge devices on a supercritical airfoil was investigated in transonic flow both experimentally and numerically. The investigations were performed for the Gurney flap, the split flap, and the divergent trailing edge, and they showed a strong influence on the supersonic flow regime, influencing the lift and drag characteristics. At constant lift, a redistribution of the lift generation from the front to the rear part of the airfoil takes place. Total-drag reductions can be achieved by the reduction of wave drag. The influences of the different types of miniature trailing-edge devices are shown. The investigation of the influence of geometry parameters showed that the variation of the height of the Gurney flap and of the deflection angle of the split flap have similar effects. Perforation of the miniature trailing-edge devices showed only a small influence. The investigation of the influence of the freestream parameters indicated that increases in Mach number and Reynolds number increase the miniature trailing-edge device effect. A drag-optimal application is possible with adaptive miniature trailing-edge devices, and the same performance is achieved by an adaptive Gurney flap and an adaptive split flap. A comparison with a flexible trailing edge could identify performance advantages of the miniature trailing-edge devices.

Item URL in elib:https://elib.dlr.de/71271/
Document Type:Article
Title:Steady Aerodynamics of Miniature Trailing-Edge Devices in Transonic Flows
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:30 May 2012
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.C031563
Page Range:pp. 898-910
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:MiniTEDs, Gurney flap, split flap, divergent trailing-edge, flexible trailing-edge, airfoil flow, wind tunnel experiment, numerical simulation, flow control, TAU, DNW-TWG
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: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Richter, Kai
Deposited On:31 May 2012 15:35
Last Modified:08 Mar 2018 18:40

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