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Aerodynamic Characteristics of the Retro Propulsion Landing Burn of Vertically Landing Launchers

Marwege, Ansgar and Gülhan, Ali (2023) Aerodynamic Characteristics of the Retro Propulsion Landing Burn of Vertically Landing Launchers. Experiments in Fluids. Springer Nature. doi: 10.21203/rs.3.rs-3415270/v1. ISSN 0723-4864.

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In the frame of the European funded H2020 project RETALT (Retro Propulsion Assisted Landing Technologies) the unsteady aerodynamics of vertically descending and landing launchers have been investigated. In this paper experimental data of the landing burn tested in the Vertical Free-Jet Facility Cologne (VMK) at DLR in Cologne is presented. The landing burn was simulated with a cold gas jet of pressurized air opposing the wind tunnel free stream. Tests with several jet conditions were compared to results without active jet. Proper Orthogonal Decomposition of Schlieren recordings and spectral analyses of their time histories are performed and are compared to frequencies in pressure measurements. Dominant frequencies were found, which are strongest at Mach 0.8. Especially a Strouhal number of 0.2 was found to be most dominant. The intensity of the dominant frequencies, can be lowered if the engine is active. The normalized root mean square pressure fluctuations are between 0.1 and 0.3 during the landing maneuver. Additionally, the steady flow features scale well with the ambient pressure ratio and the momentum flux ratio.

Item URL in elib:https://elib.dlr.de/200759/
Document Type:Article
Title:Aerodynamic Characteristics of the Retro Propulsion Landing Burn of Vertically Landing Launchers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Marwege, AnsgarUNSPECIFIEDhttps://orcid.org/0000-0002-3912-9114UNSPECIFIED
Gülhan, AliUNSPECIFIEDhttps://orcid.org/0000-0001-7460-0576UNSPECIFIED
Date:11 October 2023
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:Springer Nature
Keywords:Subsonic retro propulsion, Wind Tunnel Experiments, Vertical Landing, Launchers
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: Marwege, Ansgar
Deposited On:14 Dec 2023 09:22
Last Modified:29 Jan 2024 12:52

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