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Evaluation of Injection Strategies in Supersonic Nozzle Flow
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics. Department of Fluid-Flow Machinery, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.ORCID iD: 0000-0001-7715-863X
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics.ORCID iD: 0000-0001-7330-6965
2021 (English)In: Aerospace, ISSN 2226-4310, Vol. 8, no 12, p. 369-369Article in journal (Refereed) Published
Abstract [en]

The ability to manipulate shock patterns in a supersonic nozzle flow with fluidic injection is investigated numerically using Large Eddy Simulations. Various injector configurations in the proximity of the nozzle throat are screened for numerous injection pressures. We demonstrate that fluidic injection can split the original, single shock pattern into two weaker shock patterns. For intermediate injection pressures, a permanent shock structure in the exhaust can be avoided. The nozzle flow can be manipulated beneficially to increase thrust or match the static pressure at the discharge. The shock pattern evolution of injected stream is described over various pressure ratios. We find that the penetration depth into the supersonic crossflow is deeper with subsonic injection. The tight arrangement of the injectors can provoke additional counter-rotating vortex pairs in between the injection.

Place, publisher, year, edition, pages
MDPI, 2021. Vol. 8, no 12, p. 369-369
Keywords [en]
flow control; supersonic nozzle flow; loss reduction
National Category
Fluid Mechanics Aerospace Engineering
Research subject
Engineering Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-305930DOI: 10.3390/aerospace8120369ISI: 000735780600001Scopus ID: 2-s2.0-85121839594OAI: oai:DiVA.org:kth-305930DiVA, id: diva2:1618465
Note

QC 20211209

Available from: 2021-12-09 Created: 2021-12-09 Last updated: 2025-02-09Bibliographically approved

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Semlitsch, BernhardMihăescu, Mihai

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CiteExportLink to record
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  • apa
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  • nn-NO
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