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Shock Tunnel Testing of the Transpiration-Cooled Heat Shield Experiment AKTiV

Boehrk, Hannah and Wartemann, Viola and Martinez Schramm, Jan and Wagner, Alexander and Hannemann, Klaus and Eggers, Thino (2012) Shock Tunnel Testing of the Transpiration-Cooled Heat Shield Experiment AKTiV. 18th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 24. - 28. Sept. 2012, Tours, France. DOI: 10.2514/6.2012-5935.

Full text not available from this repository.

Official URL: http://arc.aiaa.org

Abstract

The present paper presents shock tube testing of the transpiration cooling experiment AKTiV flown on the sub-orbital re-entry body SHEFEXII. The campaign comprises testing of a 1:3 subscale model at original Reynolds number, Mach number and velocity, so that the subscaling has to be compensated for by rising the gas density. This, in turn, results in increased heat flux to the surface compared to the original. The shock tube experiments are supported by fluid dynamics computations by code TAU. Moreover, for lay out and design of the transpiration-cooled thermal protection element, the semi-analytical tool HEATS is introduced, based on a transient heat balance at the surface. Heat flux to the structure is measured just up- and downstream of the cooled sample. The measurement shows that heat flux is reduced upon coolant exhaust. Comparison of these results with HEATS shows that the heat flux predicted with HEATS is in good concurrence with the measured heat flux values at various angles of attack. HEATS results enables prediction of the cooling efficiency, giving an average heat flux reduction to 11.11% upon transpiration cooling for a coolant gas flow of 0.39 g/s and a variety of angles of attack.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Shock Tunnel Testing of the Transpiration-Cooled Heat Shield Experiment AKTiV
Authors:
AuthorsInstitution or Email of Authors
Boehrk, Hannah UNSPECIFIED
Wartemann, Viola UNSPECIFIED
Martinez Schramm, Jan UNSPECIFIED
Wagner, AlexanderUNSPECIFIED
Hannemann, Klaus UNSPECIFIED
Eggers, Thino UNSPECIFIED
Date:September 2012
Refereed publication:No
In Open Access:Yes
In SCOPUS:No
In ISI Web of Science:No
DOI:10.2514/6.2012-5935
Series Name:Conference Proceedings Online
Status:Published
Keywords:transpiration-cooling, effusion-cooling, SHEFEX, re-entry, TPS
Event Title:18th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
Event Location:Tours, France
Event Type:international Conference
Event Dates:24. - 28. Sept. 2012
Organizer:AIAA/3AF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - SHEFEX Programm (old)
Location: Stuttgart , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Institute of Structures and Design > Space Structural Components
Deposited By: Hannah Böhrk
Deposited On:16 Oct 2012 15:59
Last Modified:12 Nov 2012 16:27

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