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Experimental investigation of the inflection geometry on dual bell nozzle flow behavior

Génin, Chloé and Stark, Ralf (2011) Experimental investigation of the inflection geometry on dual bell nozzle flow behavior. 47th AIAA Joint Propulsion Conference, 31. Juli - 3. Aug. 2011, San Diego, CA, USA.

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Abstract

The altitude adaption of the dual bell nozzle is achieved by the contour inflection, leading to a symmetrical and controlled separation under sea level conditions. When reaching a certain pressure ratio, the transition to high altitude mode takes place and the nozzle flows full. Former experimental studies have shown the existence of an intermediate flow state before the transition from one operating mode to the other takes place: the sneak transition, characterized by the separation of the flow downstream to the inflection, leading to increased side loads. To minimize this effect, various contour inflection geometries have been investigated. The study was divided into a cold flow and a warm flow test campaign on sub-scale planar models.

Item URL in elib:https://elib.dlr.de/70896/
Document Type:Conference or Workshop Item (Paper)
Title:Experimental investigation of the inflection geometry on dual bell nozzle flow behavior
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Génin, ChloéChloe.Nuernberger-Genin (at) dlr.deUNSPECIFIED
Stark, RalfRalf.Stark (at) dlr.deUNSPECIFIED
Date:July 2011
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Dual Bell, Transition
Event Title:47th AIAA Joint Propulsion Conference
Event Location:San Diego, CA, USA
Event Type:international Conference
Event Dates:31. Juli - 3. Aug. 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 09:31
Last Modified:31 Jul 2019 19:32

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