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Impact of Retro Rocket Plumes on Upper Stage Aerothermodynamics during Stage Separation

Hohn, Oliver and Gülhan, Ali (2017) Impact of Retro Rocket Plumes on Upper Stage Aerothermodynamics during Stage Separation. Journal of Spacecraft and Rockets, 54 (3), pp. 640-651. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.A33728 ISSN 0022-4650

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Official URL: https://arc.aiaa.org/doi/pdf/10.2514/1.A33728


In this paper, an extensive investigation of the separation process of the first two stages of a carrier rocket that employs solid rocket motors for the lower stage is presented. As the reference vehicle, the VEGA rocket is used. The effect of the plumes of first-stage retrorockets on upper-stage aerodynamics and aerothermal loads is analyzed by means of wind-tunnel testing in the hypersonic wind tunnel H2K of DLR, German Aerospace Center. Aerodynamic coefficients are determined by force measurements. In addition, pressure distributions on the upper-stage surface and schlieren images for flow visualization are recorded. Infrared thermography measurements are conducted to determine the effect on aerothermal loads. Different flow conditions are achieved by variation of Reynolds number, retrorocket injection pressure ratio, and angle of attack. Results showed extensive flow separation around almost the entire upper stage by the retrorocket plumes already at low injection pressure ratios. During angle-of-attack sweeps, sudden changes in the flow structure occurred accompanied by strong changes in aerodynamic forces at values of α≈±2  deg. This behavior was found to be influenced by hysteresis effects.

Item URL in elib:https://elib.dlr.de/106374/
Document Type:Article
Title:Impact of Retro Rocket Plumes on Upper Stage Aerothermodynamics during Stage Separation
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hohn, Oliveroliver.hohn (at) dlr.deUNSPECIFIED
Gülhan, Aliali.guelhan (at) dlr.deUNSPECIFIED
Date:16 March 2017
Journal or Publication Title:Journal of Spacecraft and Rockets
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.2514/1.A33728
Page Range:pp. 640-651
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
Keywords:stage separation, aerothermodynamics, jet plume interaction, space transportation, launcher system
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 - Systemanalyse Raumtransport, R - Wiederverwendbare Raumfahrtsysteme und Antriebstechnologie, R - Antriebsystemtechnik - Raketenantriebtests, R - Leitprojekt - Forschungsverbund Oberstufe, R - Raumfahrzeuge Entwurf, Systemanalyse, Simulation, Messtechnik, R - EU Projekte Raumtransport (old), R - Atek (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Hohn, Oliver
Deposited On:24 Oct 2016 12:26
Last Modified:07 Jun 2018 07:24

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