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Experimental Study of ExoMars Sub- and Transonic Aerodynamics and Heat Shield Separation in HST

Neeb, Dominik and Gülhan, Ali and Augenstein, Edgar (2011) Experimental Study of ExoMars Sub- and Transonic Aerodynamics and Heat Shield Separation in HST. In: Proceedings of the 7th European Symposium on Aerothermodynamics, 692. ESA Communications, ESTEC, Noordwijk, The Netherlands. 7th European Symposium on Aerothermodynamics, 9-12 May 2011, Brugge, Belgium. ISBN 978-92-9092-256-8. ISSN 1609-042X.

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In the framework of the ESA ExoMars project an experimental investigation has been conducted in the transonic DNW wind tunnel HST with two emphases. First the static aerodynamic behaviour of the complete descent module has been investigated in the sub- to transonic flow regime, duplicating reference flight trajectory conditions through the Martian atmosphere. Therefore force and moment coefficients have been derived by means of a six component internal balance with additional pressure signals to enable base pressure corrections. The second main objective was the aerodynamic characterization of the staging process between the capsule’s heat shield and its back cover at corresponding trajectory flight conditions. For this attempt models were available for the capsule’s single parts after separation, e.g. heat shield and back cover. These components have been investigated individually to characterize its behaviour after completion of the separation process as well as to gain reference data to compare to the behaviour during the actual staging process. This flight phase has been simulated in detail by thoroughly modifying the orientation of the separating models to each other. This was enabled by a modular distance between the separating components and modification of the angle of attack. Beside force and moment measurements on the heat shield, the back cover has been equipped with 12 static as well as 12 dynamic pressure sensors. This paper gives an overview of selected results gathered during this test campaign. The measured coefficients for the complete descent module as well as for the separating models are analyzed comparing typical capsule configuration behaviour. Depending on the distance between the separating models clear interferences are evident in both force and pressure signals.

Item URL in elib:https://elib.dlr.de/73927/
Document Type:Conference or Workshop Item (Paper)
Title:Experimental Study of ExoMars Sub- and Transonic Aerodynamics and Heat Shield Separation in HST
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Journal or Publication Title:Proceedings of the 7th European Symposium on Aerothermodynamics
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Publisher:ESA Communications, ESTEC, Noordwijk, The Netherlands
Series Name:ESA Special Publication
Keywords:Subsonic, Transonic, Aerodynamics, Capsule, ExoMars, Static stability, HST, Heat shield separation
Event Title:7th European Symposium on Aerothermodynamics
Event Location:Brugge, Belgium
Event Type:international Conference
Event Dates:9-12 May 2011
Organizer:European Space Agency
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Neeb, Dominik
Deposited On:13 Jan 2012 08:28
Last Modified:13 Jan 2012 08:28

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