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Three-Dimensional Thermal Analysis of the HIFiRE-5 Ceramic Fin

Loehle, Stefan and Boehrk, Hannah and Fuchs, Ulf and Kraetzig, Benjamin and Weihs, Hendrik (2012) Three-Dimensional Thermal Analysis of the HIFiRE-5 Ceramic Fin. 18th International Space Planes and Hypersonic Systems and Technologies Conference, 24.-28. Sep 2012, Tours, Frankreich.

Full text not available from this repository.

Abstract

The German Aerospace Center (DLR) has developed a ceramic fin experiment (FinEx) for the HIFiRE-5 flight in order to test the performance of new structures with sharp leading edges during flight. The analysis of the thermal performance of the fin has been foreseen to be conducted by in-depth mounted thermocouples protocolling temperatures during flight. In a cooperative attempt between DLR and the Institut für Raumfahrtsysteme (IRS) of the University of Stuttgart, the thermal behavior is studied. In this paper, an approach is presented to determine the heat flux distribution onto the surface of the three-dimensional geometry of the fin. Using the Non-Integer System Identification (NISI) method, heat flux onto different surface elements is derived from only three thermocouples mounted inside the fin. Moreover, to increase accuracy, an area-weighted inverse method is used. The principal proof of concept is given based on a finite element thermal analysis of a cube. Measurements with a backup fin are used to show the approach experimentally in a plasma wind tunnel. Finally, the in-flight data has been evaluated and heat flux onto the fins during flight is presented. It can be concluded that the method is strongly dependent on surface discretization. However, the qualitative distribution is accurately determined. This approach allows to improve heat flux measurements for sparsely equipped flight hardware.

Item URL in elib:https://elib.dlr.de/77664/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Three-Dimensional Thermal Analysis of the HIFiRE-5 Ceramic Fin
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Loehle, Stefan Institut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Boehrk, Hannah Institut für Bauweisen- und Konstruktionsforschung, DLRUNSPECIFIED
Fuchs, Ulf Institut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Kraetzig, BenjaminInstitut für Raumfahrtsysteme, Universität StuttgartUNSPECIFIED
Weihs, Hendrik Institut für Bauweisen- und Konstruktionsforschung, DLRUNSPECIFIED
Date:December 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:HIFiRE, sharp leading edge, system identification
Event Title:18th International Space Planes and Hypersonic Systems and Technologies Conference
Event Location:Tours, Frankreich
Event Type:international Conference
Event Dates:24.-28. Sep 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
Institutes and Institutions:Institute of Structures and Design > Space Structural Components
Deposited By: Böhrk, Hannah
Deposited On:16 Oct 2012 12:27
Last Modified:16 Oct 2012 12:27

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