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Combined cryogenic insulation and thermal protection systems for reusable stages

Wilken, Jascha and Callsen, Steffen and Daub, Dennis and Fischer, Alexander and Liebisch, Martin and Rauh, Carolin and Reimer, Thomas and Scheufler, Henning and Sippel, Martin (2022) Combined cryogenic insulation and thermal protection systems for reusable stages. 9th European Conference for Aeronautics and Space Sciences (EUCASS), 27. Juni - 1.Juli, Lille, Frankreich.

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Abstract

Returning and reusing a launch vehicle stage after it has fulfilled its primary ascent mission significantly extends the range of thermal boundary conditions in which the stage has to safely operate, reaching from the cryogenic temperatures within the propellant tanks to the high external heat flux encountered during reentry to the vacuum of space. For a hydrogen-fueled stage, not only is cryogenic insulation needed but also an external thermal protection system in order to assure that the stage survives the heat loads during reentry. While usually treated as separate domains, for winged reusable launch vehicles cryogenic insulation and the thermal protection system have to be designed together since they are both integrated onto the propellant tanks external surface. This imposes new requirements on both designs. Additional complexity arises from the fact that multiple cycles of thermal and mechanical loads have to be survived without substantial refurbishment in order to assure a cost-effective design. Within the DLR this topic was first explored in the AKIRA project, which investigated selected technologies that were deemed critical for operational reusable booster stages but which are not being covered within the flight demonstrator projects of the DLR. An overview over the AKIRA experimental campaign with representative test objects, which verified the thermal functionality of the derived design, is given. Within a currently ongoing follow-on project (TRANSIENT) the design is further refined and applied to both metallic and composite tank materials. For both cases segments meant to represent a slice of an RLV propellant tank are being manufactured and equipped with the cryogenic insulation and thermal protection systems and will be tested under representative loads for up to 50 cycles. In addition to the thermal loads investigated previously, mechanical loads will also be applied to the test objects.

Item URL in elib:https://elib.dlr.de/187651/
Document Type:Conference or Workshop Item (Speech)
Title:Combined cryogenic insulation and thermal protection systems for reusable stages
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wilken, JaschaJascha.Wilken (at) dlr.dehttps://orcid.org/0000-0001-5748-1261
Callsen, SteffenSteffen.Callsen (at) dlr.dehttps://orcid.org/0000-0002-5481-5403
Daub, DennisDennis.Daub (at) dlr.dehttps://orcid.org/0000-0002-6030-698X
Fischer, AlexanderAlexander.Fischer (at) dlr.deUNSPECIFIED
Liebisch, Martinmartin.liebisch (at) dlr.dehttps://orcid.org/0000-0001-5423-7511
Rauh, Carolincarolin.rauh (at) dlr.dehttps://orcid.org/0000-0003-4506-1715
Reimer, ThomasThomas.Reimer (at) dlr.dehttps://orcid.org/0000-0002-2106-7453
Scheufler, HenningHenning.Scheufler (at) dlr.dehttps://orcid.org/0000-0003-1578-9772
Sippel, MartinMartin.Sippel (at) dlr.dehttps://orcid.org/0000-0001-7356-7575
Date:2022
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:RLV, TPS, Cryogenic insulation, cryogenic propellant, Test
Event Title:9th European Conference for Aeronautics and Space Sciences (EUCASS)
Event Location:Lille, Frankreich
Event Type:international Conference
Event Dates:27. Juni - 1.Juli
Organizer:3AF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Project TRANSIENT
Location: Bremen
Institutes and Institutions:Institute of Space Systems
Institute for Aerodynamics and Flow Technology
Institute of Structures and Design
Institute of Composite Structures and Adaptive Systems
Deposited By: Wilken, Jascha
Deposited On:26 Jul 2022 09:23
Last Modified:26 Jul 2022 09:23

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