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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. In: International Forum on Aeroelasticity and Structural Dynamics 2019, IFASD 2019. IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics, 2019-06-10 - 2019-06-13, 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 AuthorsAuthor's ORCID iDORCID Put Code
Mai, HolgerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nitzsche, JensUNSPECIFIEDhttps://orcid.org/0000-0002-2742-7368UNSPECIFIED
Saitoh, KenichiJapan Aerospace Exploration Agency (JAXA)UNSPECIFIEDUNSPECIFIED
Yoshimoto, NorioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:2019
Journal or Publication Title:International Forum on Aeroelasticity and Structural Dynamics 2019, IFASD 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
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 Start Date:10 June 2019
Event End Date:13 June 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 (old)
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 Apr 2024 20:31

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