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Aerothermal analysis of plume interaction with deployed landing legs of the CALLISTO vehicle

Ertl, Moritz and Ecker, Tobias and Klevanski, Josef and Dumont, Etienne and Krummen, Sven (2022) Aerothermal analysis of plume interaction with deployed landing legs of the CALLISTO vehicle. In: 9th European Conference For Aeronautics And Space Science, EUCASS 2022. European Conference for Aeronautics and Aerospace Sciences (EUCASS), 27. Jun. - 01. Jul. 2022, Lille, Frankreich.

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Abstract

The current European long term strategy aims at moving towards reusable launch vehicles (RLV) for the first stages of launchers. In accordance with this strategy the German Aerospace Center (DLR) has entered into a collaboration with the Japan Aerospace Exploration Agency (JAXA) and the French Space Agency (CNES) for the development of RLV relevant technologies. A part of this collaboration is a vertical take off and vertical landing (VTVL) reusable subscale launcher first stage demonstrator - the Cooperative Action Leading to Launcher Innovation in Stage Toss back Operations (CALLISTO). The mission of the CALLISTO vehicle is to return to the launch pad using retro propulsion and an Approach and Landing System (ALS) with extendable landing legs. This development leads to additional aerothermal design questions compared to traditional launchers. In the case of CALLISTO the highest heat fluxes are caused by heating from hot exhaust gases of the aft bay section. This especially affects the unfolded ALS during the final phase of the landing approach. The arising heat fluxes, therefore, influence the structural design and the thermal protection system (TPS) of the ALS. In this study we conduct computational fluid dynamics (CFD) investigations using Reynolds averaged Navier Stokes (RANS) methods of the aerothermal loads on the ALS during the landing phase. We use the Spalart-Allmaras turbulence model and frozen chemistry for the simulations. We analyse the flow field as well as the surface distributions. We investigate the necessity of simulations including the plume for these analyses. We use analyses of the flow fields as well as the surface distributions to investigate the influence of angle of attack, angle of roll, atmospheric conditions, flight speed and thrust level.

Item URL in elib:https://elib.dlr.de/187068/
Document Type:Conference or Workshop Item (Speech)
Title:Aerothermal analysis of plume interaction with deployed landing legs of the CALLISTO vehicle
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ertl, MoritzUNSPECIFIEDhttps://orcid.org/0000-0002-1900-5122
Ecker, TobiasUNSPECIFIEDhttps://orcid.org/0000-0001-7134-1185
Klevanski, JosefUNSPECIFIEDUNSPECIFIED
Dumont, EtienneUNSPECIFIEDhttps://orcid.org/0000-0003-4618-0572
Krummen, SvenUNSPECIFIEDhttps://orcid.org/0000-0002-4126-688X
Date:1 July 2022
Journal or Publication Title:9th European Conference For Aeronautics And Space Science, EUCASS 2022
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:re-usable launchers, aerothermodynamics, heat loads, landing legs, CFD
Event Title:European Conference for Aeronautics and Aerospace Sciences (EUCASS)
Event Location:Lille, Frankreich
Event Type:international Conference
Event Dates:27. Jun. - 01. Jul. 2022
Organizer:EUCASS
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 - Project CALLISTO [RP]
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Spacecraft, GO
Institute for Aerodynamics and Flow Technology > Supersonoc and Hypersonic Technology
Institute of Space Systems
Deposited By: Ertl, Moritz
Deposited On:27 Jun 2022 12:17
Last Modified:27 Jun 2022 12:17

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