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Experimental and Numerical Study of Dual Bell Nozzle Flow

Génin, Chloé and Stark, Ralf and Haidn, Oskar and Quering, Katharina and Frey, Manuel (2011) Experimental and Numerical Study of Dual Bell Nozzle Flow. 4TH EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES, 4.-8. Juli 2011, Sankt Petersburg, Russland.

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Abstract

The dual bell is a nozzle concept for altitude adaption. The flow separates at the contour inflection in sea level mode in a mainly controlled and symmetrical way, reducing the side load generation and increasing the thrust. The transition to altitude mode is reached when the flow suddenly attaches to the extension for an improved altitude thrust. The conditions of this transition and its evolution are the key for the study of dual bell nozzles. For a better understanding of the flow behavior, a 2D subscale dual bell model has been designed and tested at the German Aerospace Center (DLR). The tests were divided into two campaigns and performed under cold and warm flow conditions. The evolution of the shock system at the inflection during the transition was observed using schlieren optics. The planar nozzle was tested under various conditions in pressure and temperature. Both test campaigns have been recalculated in cooperation with Astrium. Numerical and experimental results are presented in this paper.

Item URL in elib:https://elib.dlr.de/70894/
Document Type:Conference or Workshop Item (Paper)
Title:Experimental and Numerical Study of Dual Bell Nozzle Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Génin, Chloéchloe.genin (at) dlr.deUNSPECIFIED
Stark, RalfRalf.Stark (at) dlr.deUNSPECIFIED
Haidn, OskarOskar.Haidn (at) dlr.deUNSPECIFIED
Quering, KatharinaUNSPECIFIEDUNSPECIFIED
Frey, ManuelUNSPECIFIEDUNSPECIFIED
Date:July 2011
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Dual Bell, Nozzle, Expermental, Numerical simulation
Event Title:4TH EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES
Event Location:Sankt Petersburg, Russland
Event Type:international Conference
Event Dates:4.-8. Juli 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Technologie
Deposited By: Nürnberger-Genin, Chloe
Deposited On:07 Oct 2011 09:33
Last Modified:12 Dec 2013 21:21

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