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

Stubicar, Kornelia and Reimer, Thomas and Koppenwallner, Georg and Müller-Eigner, Rudolf and Gülhan, Ali and Esser, Burkhard and Gavira, José and 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. (In Press)

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Abstract

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.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:TESTING OF EXPERT NOSE MATERIAL AND SENSOR HEADS IN THE DLR ARCJET FACILITIES
Authors:
AuthorsInstitution or Email of Authors
Stubicar, KorneliaUNSPECIFIED
Reimer, ThomasUNSPECIFIED
Koppenwallner, GeorgHST GmbH
Müller-Eigner, RudolfHST GmbH
Gülhan, AliUNSPECIFIED
Esser, BurkhardUNSPECIFIED
Gavira, JoséESA
Erba, FrancescaESA
Date:6 November 2008
Journal or Publication Title:Sixth European Symposium on Aerothermodynamics for Space Vehicles
Editors:
EditorsEmail
ESA, UNSPECIFIED
Status:In Press
Keywords:EXPERT, re-entry, hot structure, C/C-SiC, C-SiC, CMC, nose, nose cap, TPS, RESPECT, RAFLEX, FADS
Event Title:Sixth European Symposium on Aerothermodynamics for Space Vehicles
Event Location:Versailles, Frankreich
Event Type:international Conference
Event Dates:2008-11-03
Organizer:ESA, ONERA, CNES
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Grundlagen Raumtransport - Innovativer Thermalschutz (old)
Location: Köln-Porz , Stuttgart
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Institute of Structures and Design > Space Structural Components
Deposited By: Kornelia Stubicar
Deposited On:14 Jan 2009
Last Modified:12 Dec 2013 20:34

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