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Side Loads in Dual Bell Nozzles, Part II: Design Parameters

Nürnberger-Génin, Chloé and Stark, Ralf (2010) Side Loads in Dual Bell Nozzles, Part II: Design Parameters. 46th AIAA Joint Propulsion Conference, 25.-28. Juli 2010, Nashville, TN, USA.

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The contour inflection of the dual bell nozzle forces the flow to a symmetrical and controlled separation under sea level conditions. At a certain altitude, the transition to high altitude mode takes place: the flow attaches rapidly the nozzle extension wall down to the exit plane. During this transition, the separation point moves in the extension generating potential high side load peaks due to its asymmetrical position. A campaign of cold flow tests has been conducted to evaluate the generation of side load. The phenomenology during each phase of the flow has been presented in the first part of this work. The influence of the various geometrical parameters on flow behavior and side load generation is investigated in this study. The extension length is shown to be the critical parameter for flow stability, transition duration and side load generation. A trade off has to be found for the optimization of the dual bell concept to rocket applications.

Item URL in elib:https://elib.dlr.de/67610/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Side Loads in Dual Bell Nozzles, Part II: Design Parameters
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nürnberger-Génin, ChloéChloe.Nuernberger-Genin (at) dlr.deUNSPECIFIED
Stark, RalfRalf.Stark (at) dlr.deUNSPECIFIED
Date:July 2010
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:side loads, flow separation, dual bell nozzle
Event Title:46th AIAA Joint Propulsion Conference
Event Location:Nashville, TN, USA
Event Type:international Conference
Event Dates:25.-28. Juli 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Antriebsystemtechnik - Schubkammertechnologie und Hochdruckverbrennung (old)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Technologie
Deposited By: Nürnberger-Genin, Chloe
Deposited On:16 Dec 2010 12:25
Last Modified:12 Dec 2013 21:10

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