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Experimental and numerical study of heat flux in dual bell nozzles

Génin, Chloé and Gernoth, Andreas and Stark, Ralf (2011) Experimental and numerical study of heat flux in dual bell nozzles. 47th AIAA Joint Propulsion Conference, 31. Juli - 3. Aug. 2011, San Diego, CA, USA.

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Abstract

The characteristic contour inflection of a dual bell nozzle is the key to altitude adaption. In sea level conditions, it forces the flow to a symmetrical separation, limiting the side load generation and increasing the thrust. After the transition, under high altitude conditions, the nozzle flows full, increasing the vacuum thrust. A hot flow experimental study has been conducted at the German Aerospace Center on a planar dual bell nozzle. The wall temperature distribution has been measured at various depths for the determination of the heat flux through the wall. The region of the inflection is of particular interest for the adjustment of the conventional cooling methods of dual bell nozzles. The contour inflection leads to a local increase of the thermal loads. In addition to the tests, the flow behavior and thermal loads have been calculated with CFD method and compared with the experiment.

Item URL in elib:https://elib.dlr.de/70895/
Document Type:Conference or Workshop Item (Paper)
Title:Experimental and numerical study of heat flux in dual bell nozzles
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Génin, Chloéchloe.genin (at) dlr.deUNSPECIFIED
Gernoth, AndreasAndreas.Gernoth (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:Heat Flux, Dual Bell, Numerical simulation
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 09:32
Last Modified:31 Jul 2019 19:32

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