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Transpiration Cooling with Supersonic Flows and Foreign Gas Injection

Langener, Tobias and von Wolfersdorf, Jens and Kuhn, Markus and Steelant, Johan (2010) Transpiration Cooling with Supersonic Flows and Foreign Gas Injection. 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2010-07-25 - 2010-07-28, Nashville, USA.

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The extremely high heat loads within a Scramjet combustor require the use of high-temperature materials combined with efficient cooling concepts. A promising technique is the application of transpiration cooling to CMC materials. A supersonic hot-gas flow test facility is used to investigate this cooling method. The Carbon/Carbon (C/C) samples tested have porosities of about 11 %. The air-flow is electrically heated up to 1060 K total temperature with a total pressure of 3 bar and is accelerated to a Mach number of 2.1 within the test channel. Air, argon and helium are used as coolants for blowing ratios from 0 to 1 %. The surface temperature of the porous wall is measured via thermocouples and infrared thermography. An approach based upon simplified analytical models is being presented to analyze the experimental data of the cooling efficiency. This is shown for elevated temperature conditions in supersonic flows, including the specific thermal situations, which are typically encountered in such high-temperature tests.

Item URL in elib:https://elib.dlr.de/77587/
Document Type:Conference or Workshop Item (Speech)
Additional Information:AIAA-2010-6794
Title:Transpiration Cooling with Supersonic Flows and Foreign Gas Injection
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Langener, TobiasInstitute of Aerospace Thermodynamics, Universität StuttgartUNSPECIFIED
von Wolfersdorf, JensInstitute of Aerospace Thermodynamics, Universität StuttgartUNSPECIFIED
Kuhn, Markusmarkus.kuhn (at) dlr.deUNSPECIFIED
Date:27 July 2010
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:ATLLAS, CMC, Ceramic Matrix Composites, Combustion Chamber, Scramjet Combustor, Transpiration Cooling
Event Title:46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
Event Location:Nashville, USA
Event Type:international Conference
Event Dates:2010-07-25 - 2010-07-28
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 - EU Projekte Raumtransport (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space Structural Components
Deposited By: Kuhn, Markus
Deposited On:15 Oct 2012 09:41
Last Modified:12 Dec 2013 21:47

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