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Cold gas dual-bell tests in high-altitude simulation chamber

Verma, S.B. and Stark, Ralf and Génin, C. and Haidn, O. (2011) Cold gas dual-bell tests in high-altitude simulation chamber. Shock Waves, Vol. 21 (No. 2), pp. 131-140. Springer. doi: 10.1007/s00193-011-0302-6.

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An experimental investigation has been carried out to study dual-bell transition behavior in different set ups inside a high-altitude test facility. Cold gas tests were carried out under two different operating conditions namely (i) test nozzle operating in self-evacuation mode and, (ii) test nozzle operatingwith an additional ejector nozzle (pre-evacuated condition).Although forward transition nozzle pressure ratio does not show any change in its value irrespective of the type of test facility and test set up, the re-transition nozzle pressure ratio shows a significant increase (7–8%) in its value when tested in the high-altitude facility. The latter is caused due to plume blowback effect which dominates during shut down transients in such facilities. Driven by the high atmospheric pressure, the jet exhaust is pushed backwards into the altitude chamber causing the re-transition to occur earlier than that observed in sea-level tests. Further the reduced mass flow rates for nozzle operation in different test set ups in a highaltitude test facility also reduces the magnitude of side-load peaks during the dual-bell transitions.

Item URL in elib:https://elib.dlr.de/72141/
Document Type:Article
Title:Cold gas dual-bell tests in high-altitude simulation chamber
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Verma, S.B.NAL, Bangalore, IndiaUNSPECIFIED
Stark, RalfRalf.Stark (at) dlr.dehttps://orcid.org/0000-0003-1923-1901
Génin, C.Chloe.Genin (at) dlr.deUNSPECIFIED
Haidn, O.DLR LampoldshausenUNSPECIFIED
Journal or Publication Title:Shock Waves
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Volume:Vol. 21
DOI :10.1007/s00193-011-0302-6
Page Range:pp. 131-140
Keywords:Dual-bell transition · Diffuser operation · Ejector nozzle · Plume blow-back · Side-loads
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: Hanke, Michaela
Deposited On:30 Nov 2011 13:00
Last Modified:10 Jan 2019 15:50

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