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Force and Moment Measurements on a Free-Flying Capsule Model in a High-Enthalpy Shock Tunnel

Laurence, Stuart und Martinez Schramm, Jan und Hannemann, Klaus (2012) Force and Moment Measurements on a Free-Flying Capsule Model in a High-Enthalpy Shock Tunnel. 28th Aerodynamic Measurement Technology,Ground Testing, and Flight Testing Conference, 25. - 28. Jun. 2012, New Orleans, Louisiana, USA.

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Kurzfassung

Experiments to measure the forces and moments acting on a blunted-cone capsule model are carried out in the High-Enthalpy Shock Tunnel, Göttingen (HEG). A free-flying arrangement is employed, whereby the model is initially suspended by weak threads that are detached by the arrival of the flow, allowing unrestrained flight during the steady test time. High-speed shadowgraphy is used to capture the model motion. Induced forces and moments are measured using both internally mounted accelerometers and visualization-based tracking techniques. Improvements to the visualization-based techniques allow the elimination of several previously identified sources of error. Measurements are performed over a range of angles of attack, and excellent agreement is obtained between the techniques. The precision of the visualization-based results is such that variation in the free-stream conditions is the dominant source of uncertainty in the drag coefficient, and is comparable to or larger than the standard error in the lift acceleration for angles of attack above approximately 6º. When applied to pitching measurements, all techniques suffer from large standard errors, but the visualization-based techniques show the capability to outperform accelerometer measurements.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Force and Moment Measurements on a Free-Flying Capsule Model in a High-Enthalpy Shock Tunnel
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Laurence, StuartNICHT SPEZIFIZIERT
Martinez Schramm, JanNICHT SPEZIFIZIERT
Hannemann, KlausNICHT SPEZIFIZIERT
Datum:25 Juni 2012
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Seitenbereich:Seiten 1-9
Name der Reihe:Conference Proceedings online
Status:veröffentlicht
Stichwörter:Force measurement, short-duration flow, optical tracking, re-entry capsule
Veranstaltungstitel:28th Aerodynamic Measurement Technology,Ground Testing, and Flight Testing Conference
Veranstaltungsort:New Orleans, Louisiana, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:25. - 28. Jun. 2012
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Raumtransport
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R RP - Raumtransport
DLR - Teilgebiet (Projekt, Vorhaben):R - Raumfahrzeugsysteme - Anlagen u. Messtechnik
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Raumfahrzeuge
Hinterlegt von: Stuart Laurence
Hinterlegt am:10 Jul 2012 14:31
Letzte Änderung:13 Sep 2012 14:39

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