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Short duration force measurements in impulse facilities

Robinson, Matthew und Hannemann, Klaus (2006) Short duration force measurements in impulse facilities. In: AIAA Conference Proceedings (AIAA-2006-3439), Seite 15. American Institute of Aeronautics and Astronautics. 25th AIAA Aerodynamic Measurement Technology and Ground Testing, 2006-06-05 - 2006-06-08, San Francisco, CA (USA).

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Kurzfassung

A new multiple component stress wave force balance has been designed, calibrated and tested in the High Enthalpy Shock Tunnel Göttingen (HEG) of the German Aerospace Center (DLR). The balance is able to measure forces of short duration (milliseconds) on instrumented models from angles of attack from -40 to 20 degrees. Two models, a blunt cone 303mm long and a standard force reference model (HB-2) of 70mm diameter, are used to establish the accuracy of the force balance. The blunt cone tests were conducted at two different test conditions with a constant Mach number of 7.8 and total enthalpies of 3.0 and 3.5MJ/kg. At 0 degrees angle of attack and an enthalpy of 3.0MJ/kg, the measured axial coefficient was recovered to within 6% when compared to computational fluid dynamic (CFD) simulations. At –10 degrees, the axial and normal coefficients were within 6% and 9% respectively of CFD predictions while the center of pressure (based on chord length) was within 2%. Tests with the HB-2 standard force reference model were conducted at enthalpies ranging from 12 to 22 MJ/kg at an angle of attack of 0 degrees. A linear variation of the axial coefficient with the viscous similarity parameter was predicted with non-equilibrium CFD simulations assuming a laminar boundary layer. The recovered axial force coefficient remained within 6% of the CFD predictions and compared well with experimental results from other wind tunnel facilities. Reasonable comparison of pressure and heat flux measurements along longitudinal symmetry lines of the model was obtained. The accuracy of the force balance is estimated at approximately 5% for the axial component and 4% for the normal and pitching moment components.

Dokumentart:Konferenzbeitrag (Paper)
Titel:Short duration force measurements in impulse facilities
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Robinson, MatthewNICHT SPEZIFIZIERT
Hannemann, KlausNICHT SPEZIFIZIERT
Datum:2006
Erschienen in:AIAA Conference Proceedings
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seite 15
Verlag:American Institute of Aeronautics and Astronautics
Status:veröffentlicht
Stichwörter:Short duration force measurement, shock tube
Veranstaltungstitel:25th AIAA Aerodynamic Measurement Technology and Ground Testing
Veranstaltungsort:San Francisco, CA (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2006-06-05 - 2006-06-08
Veranstalter :American Institute of Aeronautics and Astronautics
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W RP - Raumtransport
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W RP - Raumtransport
DLR - Teilgebiet (Projekt, Vorhaben):W - Grundlagen Raumtransport - Anlagen und Messtechnik (alt)
Standort: Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Raumfahrzeuge
Hinterlegt von: Dagmar Brennecke-Hosseinzadeh
Hinterlegt am:21 Aug 2007
Letzte Änderung:27 Apr 2009 12:54

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