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DYNAST: Dynamic Stability of Capsules and Blunt Bodies at Angle of Attack

Gawehn, Thomas and Reimann, Bodo and Tysell, Lars and Bonetti, Davide and Jirasek, Adam and Johnstone, Emma and Clopeau, Etienne and Gülhan, Ali and Molina, Rafael and Ferracina, Luca (2019) DYNAST: Dynamic Stability of Capsules and Blunt Bodies at Angle of Attack. Space Engineering and Technology Final Presentation Days (SET-FPDs), 02.-04. Juli 2019, ESA/ESTEC, Noordwijk, The Netherlands.

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Abstract

The study aims to improve the IXV aeroshape by implementing small wings to allow passing the transonic flight regime at angle of incidence below 40°, improving static stability in subsonic and achieving L/D>1. Two numerically optimized configurations are investigated. Static and dynamic aerodynamic coefficients are determined experimentally in the range 0.5≤Ma≤2.0 applying force measurement and free oscillation technique. At representative conditions static numerical simulations are performed. Dynamic coefficients are also determined, using two approaches: Fully coupled URANS/RBD-simulation of a free oscillation and hybrid RANS/LES-simulation of a prescribed motion. All results coincided well at Ma=2.0, but differ for transonic and subsonic cases. An experimentally built AEDB is used for flight performance analysis which proves to be promising in decreasing trim angle and increasing L/D-ratio. The configurations are found to be either statically stable, indifferent or only slightly unstable. Dynamically, only damped oscillations are recorded. Though, the modified aeroshape seems to overcome the stability issues of IXV in the transonic range.

Item URL in elib:https://elib.dlr.de/128628/
Document Type:Conference or Workshop Item (Speech)
Title:DYNAST: Dynamic Stability of Capsules and Blunt Bodies at Angle of Attack
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gawehn, ThomasThomas.Gawehn (at) dlr.dehttps://orcid.org/0000-0003-1628-0062
Reimann, BodoBodo.Reimann (at) dlr.deUNSPECIFIED
Tysell, LarsFOI, SwedenUNSPECIFIED
Bonetti, DavideDeimos Space UK, Ltd.UNSPECIFIED
Jirasek, AdamFOI, SchwedenUNSPECIFIED
Johnstone, Emmaemma.johnstone (at) fluidgravity.co.ukUNSPECIFIED
Clopeau, EtienneAirbus DSUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Molina, RafaelEuropean Space Agency, ESTECUNSPECIFIED
Ferracina, LucaEuropean Space Agency, ESTECUNSPECIFIED
Date:2 July 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Static and dynamic stability, wind tunnel testing, IXV aero shape
Event Title:Space Engineering and Technology Final Presentation Days (SET-FPDs)
Event Location:ESA/ESTEC, Noordwijk, The Netherlands
Event Type:international Conference
Event Dates:02.-04. Juli 2019
Organizer:ESA/ESTEC
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 - Raumfahrzeugsysteme - Anlagen u. Messtechnik, R - Raumfahrzeuge Entwurf, Systemanalyse, Simulation, Messtechnik, R - Raumfahrzeugsysteme - Rückkehrtechnologie
Location: Braunschweig , Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Institute for Aerodynamics and Flow Technology > Spacecraft, BS
Deposited By: Gawehn, Dr.-Ing. Thomas
Deposited On:07 Aug 2019 14:48
Last Modified:07 Aug 2019 14:48

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