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EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF UNSTEADY AERODYNAMIC DERIVATIVES FOR A GENERIC LAMBDA WING UCAV CONFIGURATION

Zimper, Dirk and Huber, Kerstin Claudie (2018) EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF UNSTEADY AERODYNAMIC DERIVATIVES FOR A GENERIC LAMBDA WING UCAV CONFIGURATION. Deutscher Luft- und Raumfahrtkongress 2018, 4. - 6. September 2918, Friedrichshafen.

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Abstract

Experimental and numerical investigations have been conducted in order to analyze the unsteady aerodynamic and flight mechanical behavior of a 53° flying wing configuration representing a generic unmanned combat air vehicle (UCAV). The considered vehicle is named SACCON/ DLR-F17 and the here presented results have been collected within an internal project of the German Aerospace Center in collaboration with the NATO Task Group AVT-201 on “Extended Assessment of Reliable Stability & Control Prediction Methods for NATO Air Vehicles”. Both projects have the aim to conduct studies of an integrated approach to predict the stability and control characteristics for a generic UCAV configuration based on both, experimental and numerical investigations. Systematic investigations have been performed to determine the dynamic derivatives for the longitudinal and lateral motion. A comparison between data of experimental wind tunnel investigations and numerical simulations under real flight conditions is given. In wind tunnel tests, performed in the DNWNWB wind tunnel, the SACCON configuration was studied at a reduced scale of 1:8 and a Mach number of M∞ = 0.15. Forced oscillation motions were performed during these tests to calculate the dynamic derivatives from force and moment data. For the numerical calculations the same reduced frequencies were applied with the full scale configuration under real flight conditions using the RANS method DLR-TAU. The planform aerodynamics is governed by complex nonlinear flow phenomena due to leading edge vortex flow separation at moderate to high angles of attack. Based on the numerical results an interpretation of the complex vortex flow is given in order to understand the unsteady flow phenomena for a variety of roll, pitch, and yawing motions.

Item URL in elib:https://elib.dlr.de/129427/
Document Type:Conference or Workshop Item (Speech)
Title:EXPERIMENTAL AND NUMERICAL INVESTIGATIONS OF UNSTEADY AERODYNAMIC DERIVATIVES FOR A GENERIC LAMBDA WING UCAV CONFIGURATION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zimper, DirkDirk.Zimper (at) dlr.dehttps://orcid.org/0000-0001-5780-5545
Huber, Kerstin ClaudieKerstin.Huber (at) dlr.deUNSPECIFIED
Date:14 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:UCAV, Vortex, CFD, Experiment, Dynamic Derivatives
Event Title:Deutscher Luft- und Raumfahrtkongress 2018
Event Location:Friedrichshafen
Event Type:national Conference
Event Dates:4. - 6. September 2918
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V. (DGLR)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies, L - Flight Physics, L - Simulation and Validation
Location: Berlin-Adlershof
Institutes and Institutions:Program Coordination Defence & Security Research
Institute for Aerodynamics and Flow Technology
German-Dutch Windtunnels
Deposited By: Zimper, Dr.-Ing. Dirk
Deposited On:07 Oct 2019 10:05
Last Modified:07 Oct 2019 10:05

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