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Zur Numerischen Simulation Der Olstrahl-Zahnrad-Interaktion in Flugtriebwerken: Eine Studie Mit Sph Und Vof
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ISBN10: 383255582X
ISBN13: 9783832555825
Publisher: Logos Verlag Berlin
Published: Dec 15 2022
Pages: 213
Weight: 1.23
Language: German
ISBN13: 9783832555825
Publisher: Logos Verlag Berlin
Published: Dec 15 2022
Pages: 213
Weight: 1.23
Language: German
Mit der Getriebefan-Technologie werden hohe Nebenstromverhaltnisse und damit effizientere und leisere Flugantriebe moglich. Bei dieser Triebwerksarchitektur ist die Optimierung des Olsystems im integralen Hochstleistungsgetriebe unerlasslich, insbesondere hinsichtlich dessen Kuhlfunktion. Vorangegangene Untersuchungen haben gezeigt, dass der Olausbreitung uber die Zahnflanken infolge der Olstrahl-Zahnrad-Interaktion (OZI) eine wichtige Rolle fur die mittels Einspritzschmierung erzielte Kuhlwirkung zukommt. Dennoch ist die Charakterisierung der OZI bislang luckenhaft. In dieser Arbeit wird die OZI mittels numerischer Stromungssimulation (CFD) zuganglich gemacht. Der dreidimensionale und transiente Stromungsprozess wird hochaufgelost abgebildet, wodurch dessen quantitative Analyse moglich wird. Zum Einsatz kommen die gitterbasierte Volume-of-Fluid(VOF)-Methode und erstmals die partikelbasierte Smoothed-Particle-Hydrodynamics(SPH)-Methode. Unter Variation von Betriebsparametern wird die Datenbasis zur Charakterisierung der OZI geschaffen. Ausserdem wird der Zahnradeingriff erstmals simulativ berucksichtigt. Als Haupteinflussgrossen fur die Zahnflankenbenetzung werden die Aufpralltiefe, das Effektivvolumen und die Aufprall-Reynolds-Zahl identifiziert. Auf dieser Basis gebildete Korrelationen fur die Benetzungsflache und die Eindringtiefe sind durch die vorliegende Arbeit erstmals verfugbar. Dies unterstutzt die Optimierung des Olsystems fur Getriebefan-Triebwerke und motiviert den weiteren Einsatz von CFD in Praxis und Forschung auf diesem Gebiet.
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