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Impact of Shape Change on Capsule Aerodynamics and Shock-wave Boundary Layer Interaction

Gawehn, Thomas and Schleutker, Thorn and Gülhan, Ali (2022) Impact of Shape Change on Capsule Aerodynamics and Shock-wave Boundary Layer Interaction. 2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering (FAR), 2022-06-19 - 2022-06-23, Heilbronn, Germany.

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Abstract

Blunt capsule shapes have proven to be suitable for atmospheric entry flights on numerous missions. Some concepts like MarcoPolo-R focus on fully passive entry systems without a parachute, demanding for aerodynamic stability of the shape throughout the complete entry flight. These probes are commonly equipped with a Thermal Protection System (TPS) consisting of an ablative material. The recession of the TPS in the early entry flight phase may lead to a significant shape change. The capsule needs to remain aerodynamically stable for a successful mission completion despite these shape changes. Within ESA’s Modshape TRP the aerodynamic impact of the recession on the MarcoPolo-R capsule is investigated experimentally and numerically. Static force and moment measurements in the TMK wind tunnel are a major part of this TRP. The experimental simulations are conducted on the nominal or baseline configuration and two configurations representing the aero shape with the recessed TPS after the hot entry flight phase of different entry scenarios. The flow structure around the capsule is visualised at supersonic Mach numbers by means of schlieren imaging. Under certain conditions, development of a complex shock system on the leeward side of the inclined capsule is observed. Numerical simulations with the DLR TAU code are performed to support the interpretation of the flow phenomena in these cases.

Item URL in elib:https://elib.dlr.de/187173/
Document Type:Conference or Workshop Item (Speech)
Title:Impact of Shape Change on Capsule Aerodynamics and Shock-wave Boundary Layer Interaction
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Gawehn, ThomasUNSPECIFIEDhttps://orcid.org/0000-0003-1628-0062UNSPECIFIED
Schleutker, ThornUNSPECIFIEDhttps://orcid.org/0000-0002-1833-2850UNSPECIFIED
Gülhan, AliUNSPECIFIEDhttps://orcid.org/0000-0003-4905-5881UNSPECIFIED
Date:June 2022
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Planetary probe; atmospheric entry flight; capsule aerodynamics; schlieren visualization; computational fluid dynamics (CFD); secondary shock structures; shock wave boundary layer interaction (SBLI)
Event Title:2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering (FAR)
Event Location:Heilbronn, Germany
Event Type:international Conference
Event Start Date:19 June 2022
Event End Date:23 June 2022
Organizer:European Space Agency (ESA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Reusable Space Systems and Propulsion Technology
Location: Köln-Porz
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Gawehn, Dr.-Ing. Thomas
Deposited On:07 Sep 2022 15:01
Last Modified:24 Apr 2024 20:48

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