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Control surface dynamics at transonic airspeeds

Mai, Holger and Nitzsche, Jens and Saitoh, Kenichi and Yoshimoto, Norio (2019) Control surface dynamics at transonic airspeeds. IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics, 10.-13. Juni 2019, Savannah, GA (USA).

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Abstract

In a cooperative work JAXA and DLR performed two wind-tunnel experiments with a NLR7301 airfoil model performing harmonic pitch oscillations with a 25% trailing edge flap with individually controlled harmonic flap oscillations in the transonic airspeed regime. The unsteady flow field was measured with integrated pressure sensors. Nonlinear aerodynamic effects due to shock dynamics and unsteady flow separation were investigated as they are a key problem in flutter analysis of wings with control surfaces at transonic airspeeds. For highest accuracy of the data an optical position measurement system was used to measure the motion of the model and the flap and their deformation under wind load. It turned out that the deformation under wind load cannot be neglected, but has to be taken into account when comparing the data to numerical simulations. The target therefore is to derive a simple structural model for the deformation and to get corrected data at every point of the test envelope.

Item URL in elib:https://elib.dlr.de/127969/
Document Type:Conference or Workshop Item (Speech)
Title:Control surface dynamics at transonic airspeeds
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mai, HolgerHolger.Mai (at) dlr.deUNSPECIFIED
Nitzsche, JensJens.Nitzsche (at) dlr.dehttps://orcid.org/0000-0002-2742-7368
Saitoh, KenichiJapan Aerospace Exploration Agency (JAXA)UNSPECIFIED
Yoshimoto, NorioUNSPECIFIEDUNSPECIFIED
Date:2019
Refereed publication:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:supercritical airfoil, control surface, flap, shock dynamics, gust load alleviation, flutter, wind tunnel, NLR7301
Event Title:IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics
Event Location:Savannah, GA (USA)
Event Type:international Conference
Event Dates:10.-13. Juni 2019
Organizer:AIAA
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 - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Experiments
Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Grischke, Birgid
Deposited On:24 Jun 2019 15:56
Last Modified:24 Jun 2019 15:56

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