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Rocket nozzle cold-gas flow velocity measurements using laser-induced gratings

Neracher, M. and Hemmerling, Bernd and Kozlov, D. and Kwan, Wiehan and Stark, Ralf and Klimenko, D. and Clauss, Walter and Oschwald, Michael (2002) Rocket nozzle cold-gas flow velocity measurements using laser-induced gratings. Journal of Raman Spectroscopy (33), pp. 912-918.

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Abstract

The heterodyne detection laser-induced electrostrictive gratings technique was employed for characterization of a flow velocities field in the plume of a rocket nozzle. The intention of the work was to validate CFD calculations, that predict the appearance of a recirculation zone inside the flow at a certain ratio of nozzle and ambient pressures. This zone co-existswith the side loads to the nozzlewall thatwere observed experimentally as transient forces during the start-up or the shut-down of the thrust chamber. Measurements were performed in cold-gas flows from a subscale thrust-optimized, parabolic nozzle. Nitrogen at stagnation pressures up to 40 bar was supplied to the nozzle. The experimental results clearly proved the existence of a recirculation zone in the flow field, in a reasonable agreement with the predictions of CFD calculations.

Item URL in elib:https://elib.dlr.de/49240/
Document Type:Article
Title:Rocket nozzle cold-gas flow velocity measurements using laser-induced gratings
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Neracher, M.Paul Scherrer Institute, Villingen PSIUNSPECIFIED
Hemmerling, BerndPaul Scherrer Institute, Villingen PSIUNSPECIFIED
Kozlov, D.General Physics Institute, MoscowUNSPECIFIED
Kwan, WiehanUNSPECIFIEDUNSPECIFIED
Stark, RalfUNSPECIFIEDUNSPECIFIED
Klimenko, D.UNSPECIFIEDUNSPECIFIED
Clauss, WalterUNSPECIFIEDUNSPECIFIED
Oschwald, MichaelUNSPECIFIEDUNSPECIFIED
Date:2002
Journal or Publication Title:Journal of Raman Spectroscopy
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 912-918
Status:Published
Keywords:Nozzle Flows, Laser Induced Gratings, LiGs
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: Stark, Dr.-Ing. Ralf
Deposited On:03 Jul 2007
Last Modified:31 Jul 2019 19:19

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