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Flow separation in out-of-round nozzles, a numerical and experimental study

Génin, C. and Stark, Ralf and Jack, Sebastian (2015) Flow separation in out-of-round nozzles, a numerical and experimental study. In: Progress in Flight Physics pp. 269-282. doi: 10.1051/eucass/201507269.

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Official URL: http://dx.doi.org/10.1051/eucass/201507269


The start-up and shutdown transient phases in rocket engine nozzles generate high side loads. The internal and external flow fluctuations can excite the eigenmodes of the nozzle structure. The flow separation in out-of-round nozzle intensifies the initial structure deformation leading in the worst case to the collapse of the nozzle. In the framework of the DLR internal cooperation program ProTAU, the ovalization of nozzles is being investigated from both the numerical and the experimental point of view. Three nozzle geometries have been designed and deformed applying various methods. The flow behavior in the initially axisymmetric and the ovalized contours has been numerically investigated. The most promising contours will be manufactured as permanently ovalized nozzle models and tested under cold flow conditions.

Item URL in elib:https://elib.dlr.de/101698/
Document Type:Book Section
Title:Flow separation in out-of-round nozzles, a numerical and experimental study
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Stark, RalfUNSPECIFIEDhttps://orcid.org/0000-0003-1923-1901UNSPECIFIED
Jack, SebastianUNSPECIFIEDhttps://orcid.org/0000-0002-1554-6503UNSPECIFIED
Date:8 June 2015
Journal or Publication Title:Progress in Flight Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 269-282
Keywords:nozzle, rocket engine nozzle
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 - ProTAU + Prop2020 Hochleistungstriebwerke (old)
Location: Braunschweig , Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Institute of Aerodynamics and Flow Technology
Deposited By: Hanke, Michaela
Deposited On:11 Jan 2016 09:55
Last Modified:05 Nov 2020 12:10

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