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An optical position monitoring system for investigation of model displacement and transient motion of wind tunnel models

Otter, D. und Möller, T. J. und Bütefisch, K. A. (2001) An optical position monitoring system for investigation of model displacement and transient motion of wind tunnel models. In: ICIASF 2001 Record, Seiten 140-143. 19th International Congress on Instrumentation in Aerospace Simulation Facilties (ICIASF), 27.-30. August 2001, Cleveland, Oh. (USA). ISBN 0-7803-7022-8.

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Kurzfassung

In complex wind tunnel test simulating unsteady manoeuvres, e.g. transient rolling motion at large angles of attack, it is necessary to determine the actual position of the wind tunnel model, since existing measuring techniques could not give reliable data of the position of the wind tunnel model, e.g. angle of attack, rolling angle. To solve the described problem an optical system has been developed which basically focuses the model, or part of it, onto an image plane where a line sensor is placed, utilising four independent line CCD sensors with a data rate of 6.4 kHz. To evaluate the data from the line sensors digital image processing is used to transform the data from the sensor frame of reference to the wind tunnel co-ordinate system leading to the actual model position within the wind tunnel frame of reference. In the presented experiment the displacement and motion of a rolling delta wing model in the DNW-TWG has been investigated. The position of a delta wing has been determined by means of the newly developed optical position monitoring system of DLR. The investigations have been performed in the 1 m x 1 m test section of the DNW-TWG wind tunnel. The wind tunnel was operated at Mach numbers up to 0.85. The model has a sweep angle L= 65° and a length of 433 mm, the maximum corresponding Reynolds number based on the model length in the present experiment is 8.5*106. The angle of incidence has been varied between 9° and 25°. The largest applied rolling rate was w=3200 °/s. A typical model rolling motion in an interval between 0° and 90° leads to 72 position data for w=3200 °/s.

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=2001, monograph_id=4.1,
Titel:An optical position monitoring system for investigation of model displacement and transient motion of wind tunnel models
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Otter, D.NICHT SPEZIFIZIERT
Möller, T. J.NICHT SPEZIFIZIERT
Bütefisch, K. A.NICHT SPEZIFIZIERT
Datum:2001
Erschienen in:ICIASF 2001 Record
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 140-143
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
Wernet, Mark (Chairmann)NICHT SPEZIFIZIERT
ISBN:0-7803-7022-8
Status:veröffentlicht
Stichwörter:wind tunnel measurement technique, optical measurent technique
Veranstaltungstitel:19th International Congress on Instrumentation in Aerospace Simulation Facilties (ICIASF)
Veranstaltungsort:Cleveland, Oh. (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:27.-30. August 2001
Veranstalter :NASA, Glenn Research Center and OAI, OH, USA
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik
Standort: Bonn-Oberkassel
Institute & Einrichtungen:Projektträger im DLR
Hinterlegt von: Ilka Micknaus
Hinterlegt am:20 Feb 2006
Letzte Änderung:14 Jan 2010 17:07

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