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Numerical and Experimental Investigation of Flow Separation in Ovalized Nozzles

Jack, Sebastian and Génin, Chloé (2014) Numerical and Experimental Investigation of Flow Separation in Ovalized Nozzles. Space Propulsion Conference 2014, 19.-22. Mai 2014, Köln, Deutschland.

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Abstract

During the unsteady start-up and shut-down process in supersonic rocket engine nozzles high sideloads can occur. Fluctuations, e.g. in the propellant feeding mass flow or the ambient pressure, can excite the nozzle’s Eigenmodes leading to deformation and, in the worst case, to destruction of the nozzle structure. Separation of the nozzle flow amplifies this excitation. The flow characteristics in ovalized rocket nozzles and their influence on the nozzle structure is therefore investigated within the framework of the DLR internal cooperation program ProTAU. Three TIC nozzles have been designed, manufactured and tested to provide validation data for numerical simulations. The influence of the used turbulence model on the wall pressure and shock system have been investigated for the undeformed and a set of generically deformed nozzle contours.

Item URL in elib:https://elib.dlr.de/90825/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical and Experimental Investigation of Flow Separation in Ovalized Nozzles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jack, SebastianSebastian.Jack (at) dlr.deUNSPECIFIED
Génin, Chloéchloe.genin (at) dlr.deUNSPECIFIED
Date:May 2014
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Flow Separation, Nozzle, Cold Gas, CFD, Experiment
Event Title:Space Propulsion Conference 2014
Event Location:Köln, Deutschland
Event Type:international Conference
Event Dates:19.-22. Mai 2014
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 - ProTAU + Prop2020 Hochleistungstriebwerke
Location: Braunschweig , Lampoldshausen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Institute of Space Propulsion > Rocket Propulsion
Deposited By: Jack, Sebastian
Deposited On:06 Oct 2014 07:52
Last Modified:31 Jul 2019 19:48

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