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Investigation of insulation and thermal protection systems for reusable cryogenic stages

Wilken, Jascha and Callsen, Steffen and Daub, Dennis and Fischer, Alexander and Liebisch, Martin and Rauh, Carolin and Reimer, Thomas and Sippel, Martin (2022) Investigation of insulation and thermal protection systems for reusable cryogenic stages. 2nd International Conference on High-Speed Vehicle Science Technology, 11-15 September 2022, Bruges, Belgium.

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Abstract

Reusable launch vehicle stages encounter large heat fluxes during their mission, especially during reentry. For winged stages decelerating through aerodynamic forces this means, large areas of the of the vehicle have to be covered with a thermal protection system (TPS). For reusable systems with integral cryogenic tanks the TPS is exposed to the cryogenic temperatures of the propellants within. If the propellant tanks are covered in cryogenic insulation, required for hydrogen-fueled stages, the TPS and cryogenic insulation cannot be treated as separate technical domains but have to be designed and integrated jointly, considering the boundary conditions of each other. Additional complexity is introduced by the fact that no operational experience for orbital stages exist for the reuse of cryogenic insulation. Within the DLR this topic was first explored in the AKIRA project, and the work is being continued within the currently ongoing project TRANSIENT. The design of the combined subsystem from AKIRA is further refined and applied to both metallic and composite tank materials. In addition to the thermal loads previously considered, the mechanical loads acting on the vehicle throughout the mission are assessed and incorporated into the design of the experimental devices. For both cases segments meant to represent a slice of an RLV propellant tank are being manufactured and equipped with the combined cryogenic insulation and thermal protection systems and will be tested under representative loads for up to 50 cycles. In addition to the thermal loads, mechanical loads will also be applied to the test objects. The current status of the integration and preparation of the test objects is shown and the planned experiments discussed.

Item URL in elib:https://elib.dlr.de/188689/
Document Type:Conference or Workshop Item (Speech)
Title:Investigation of insulation and thermal protection systems for reusable cryogenic stages
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Wilken, JaschaUNSPECIFIEDhttps://orcid.org/0000-0001-5748-1261UNSPECIFIED
Callsen, SteffenUNSPECIFIEDhttps://orcid.org/0000-0002-5481-5403UNSPECIFIED
Daub, DennisUNSPECIFIEDhttps://orcid.org/0000-0002-6030-698XUNSPECIFIED
Fischer, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liebisch, MartinUNSPECIFIEDhttps://orcid.org/0000-0001-5423-7511UNSPECIFIED
Rauh, CarolinUNSPECIFIEDhttps://orcid.org/0000-0003-4506-1715UNSPECIFIED
Reimer, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-2106-7453UNSPECIFIED
Sippel, MartinUNSPECIFIEDhttps://orcid.org/0000-0001-7356-7575UNSPECIFIED
Date:September 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
Event Title:2nd International Conference on High-Speed Vehicle Science Technology
Event Location:Bruges, Belgium
Event Type:international Conference
Event Dates:11-15 September 2022
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 for Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Institute of Space Systems > Space Launcher Systems Analysis
Institute of Space Systems > Transport and Propulsion System
Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Institute of Structures and Design > Space System Integration
Deposited By: Wilken, Jascha
Deposited On:06 Oct 2022 10:05
Last Modified:06 Oct 2022 10:05

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