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Application of Transpiration Cooling for Hot Structures

Kuhn, Markus and Hald, Hermann (2008) Application of Transpiration Cooling for Hot Structures. In: RESPACE - Key Technologies for Reusable Space Systems Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 98. Springer-Verlag Berlin Heidelberg. pp. 82-103. ISBN 978-3-540-77818-9. ISSN 1612-2909.

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Specific parts of re-entry vehicles are exposed to severe conditions. Thereby, the material’s capabilities can be exceeded by far and advanced cooling methods become necessary. Within the scope of this work, transpiration cooling was investigated in arc jet heated plasma flows by means of flat plate models. Screening tests pointed out, that transpiration cooling at the conditions tested is working well. Extensive testing at more severe conditions was done using three porous sample materials: Standard C/C with coolant flows parallel and perpendicular to the material’s fibre layers and highly porous C/C. Coolant gases used were air, argon, helium and nitrogen. Minimal optimal coolant mass flows of 0.5 g/s Ar, 0.2 g/s He and 0.4 g/s N2 were determined resulting in sample under surface temperature reductions of 50-60%. Altogether, sample under surface temperature reductions of 64% for He, 65% for Ar, 67% for air and 70% for N2 were detected. These test series verified that transpiration cooling can be applied successfully for hot structures at application relevant re-entry conditions.

Item URL in elib:https://elib.dlr.de/66606/
Document Type:Contribution to a Collection
Title:Application of Transpiration Cooling for Hot Structures
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kuhn, Markusmarkus.kuhn (at) dlr.deUNSPECIFIED
Journal or Publication Title:RESPACE - Key Technologies for Reusable Space Systems
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 82-103
EditorsEmailEditor's ORCID iD
Publisher:Springer-Verlag Berlin Heidelberg
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Keywords:Transpiration Cooling, Ceramic Matrix Composites, CMC
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 - Projekt IMENS-3C (old), W - Grundlagen Raumtransport - Innovativer Thermalschutz (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space Structural Components
Deposited By: Kuhn, Markus
Deposited On:11 Jan 2011 09:31
Last Modified:11 Jan 2011 09:31

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