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TESTING OF EXPERT NOSE MATERIAL AND SENSOR HEADS IN THE DLR ARCJET FACILITIES

Stubicar, Kornelia und Reimer, Thomas und Koppenwallner, Georg und Müller-Eigner, Rudolf und Gülhan, Ali und Esser, Burkhard und Gavira, José und Erba, Francesca (2008) TESTING OF EXPERT NOSE MATERIAL AND SENSOR HEADS IN THE DLR ARCJET FACILITIES. In: Sixth European Symposium on Aerothermodynamics for Space Vehicles. Sixth European Symposium on Aerothermodynamics for Space Vehicles, 2008-11-03, Versailles, Frankreich. (im Druck)

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Kurzfassung

The EXPERT program is a re-entry mission to gather in-flight data of the aerothermodynamic environment. The EXPERT NAP (Instrumented Nose Assembly) is a sub-system of the EXPERT vehicle. The nose is the essential hot structure component at the front of the EXPERT vehicle to protect the vehicle internal from aerothermodynamic heat loads. The ceramic matrix composite (CMC) nose cap system, which has to withstand the extreme thermal loads during re-entry, is designed and manufactured using DLR’s C/C-SiC material. The behaviour of this material and especially all NAP components out of this material had to be tested under the EXPERT trajectory conditions. The RESPECT (payload of the IRS, University Stuttgart) and RAFLEX (payload of HTG) payloads are using ceramic sensor head (SH) bolts. These bolts will be positioned in the ceramic nose cap and are exposed to the plasma in the stagnation area. In the centre of the bolts is a hole that serves the purpose of pressure measurement (RAFLEX) and optical access to the plasma (RESPECT). System samples were integrated into a wind tunnel probe for testing them in the LBK plasma wind tunnel facility. The LBK facility at DLR in Cologne was used to create the required test environment. During various tests the behaviour of the material as well as the influence of hole and bolt edge was investigated. With the measured data, especially the ones of the RAFLEX system samples, a discussion will be performed focussed on the effect of a drill hole or a circular edge on the nose and the payload performance. The paper presents test data like the calorimeter temperature, pressure, surfaces temperatures etc. measured during the tests.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:TESTING OF EXPERT NOSE MATERIAL AND SENSOR HEADS IN THE DLR ARCJET FACILITIES
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Stubicar, KorneliaNICHT SPEZIFIZIERT
Reimer, ThomasNICHT SPEZIFIZIERT
Koppenwallner, GeorgHST GmbH
Müller-Eigner, RudolfHST GmbH
Gülhan, AliNICHT SPEZIFIZIERT
Esser, BurkhardNICHT SPEZIFIZIERT
Gavira, JoséESA
Erba, FrancescaESA
Datum:6 November 2008
Erschienen in:Sixth European Symposium on Aerothermodynamics for Space Vehicles
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
ESA, NICHT SPEZIFIZIERT
Status:im Druck
Stichwörter:EXPERT, re-entry, hot structure, C/C-SiC, C-SiC, CMC, nose, nose cap, TPS, RESPECT, RAFLEX, FADS
Veranstaltungstitel:Sixth European Symposium on Aerothermodynamics for Space Vehicles
Veranstaltungsort:Versailles, Frankreich
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2008-11-03
Veranstalter :ESA, ONERA, CNES
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 - Innovativer Thermalschutz (alt)
Standort: Köln-Porz , Stuttgart
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Über- und Hyperschalltechnologien
Institut für Bauweisen- und Konstruktionsforschung > Raumfahrt- System- Integration
Hinterlegt von: Kornelia Stubicar
Hinterlegt am:14 Jan 2009
Letzte Änderung:12 Dez 2013 20:34

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