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ELEVON-ELEVON GAP FLOW IMPINGEMENT

Longo, José Maria and Reimann, Bodo and Strom, Silvia and Radespiel, Rolf and Esdorf, Malte and Wolf, Torsten (2008) ELEVON-ELEVON GAP FLOW IMPINGEMENT. 6th European Symposium on Aerothermodynamics for Space Vehicles, 2008-11-03 - 2008-11-06, Versailles (France).

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Abstract

The paper presents an experimental and numerical investigation of the unsteady, transitional flow resulting at a cantilever flap configuration of a space vehicle in cold hypersonics. The goal oft the study is to investigate the potential to use an aerodynamic controlled vehicle for an aerobraking manoeuvre when returning from a Moon mission. An experimental investigation is carried out in the high-speed Ludwig tube facility of the Technische Universität Braunschweig, at Mach 6, Reynolds numbers varying frorn 2.4 10<sup>6</sup> to 1.7 10 <sup>7</sup>, and supported by numerical solutions obtained with the TAU code of the DLR. The analysis of the experimental and numerical results displays a complex unsteady flow topology at the control surfaces, with severe hot points resulting from shock-shock interaction, shock-boundary layer interaction and jet flow in the gap between the flaps. The resulting jet impingement at the flaps results in heat fluxes which largely surpass the stagnation point heat flux. Such situation becomes more severe as the flow evolves from almost laminar for the low Reynolds number case to transitional at the flaps for the high Reynolds number case. It turns out aerobraking manoeuvres with aerodynamic controlled vehicles should be carefully designed since shock-shock interactions may jeopardizing the whole mission.

Document Type:Conference or Workshop Item (Paper)
Title:ELEVON-ELEVON GAP FLOW IMPINGEMENT
Authors:
AuthorsInstitution or Email of Authors
Longo, José MariaUNSPECIFIED
Reimann, BodoUNSPECIFIED
Strom, SilviaUNSPECIFIED
Radespiel, RolfTU Braunschweig
Esdorf, MalteTU Braunschweig
Wolf, TorstenTU Braunschweig
Date:6 November 2008
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:re-entry, aerothermodynamics, experiments, CFD, shock-shock interaction
Event Title:6th European Symposium on Aerothermodynamics for Space Vehicles
Event Location:Versailles (France)
Event Type:international Conference
Event Dates:2008-11-03 - 2008-11-06
Organizer:European Space Agency
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 - Zukünftige Raumtransporter - Entwurf und Simulationsmethoden für Raumtransporter (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Dr.-Ing. Jose Maria Longo
Deposited On:13 Mar 2009
Last Modified:12 Dec 2013 20:36

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