Potenzial von nicht-konstanter Rotorsteigung fur Schraubenkompressoren

By (author) Matthias Utri

Extent: 229 pages

Publisher: Logos Verlag Berlin

Subjects: Technical Sciences: Computer Science, Engineering, IT, & Math

Series: Schriftenreihe des Fachgebietes Fluidtechnik

Series volume number: 6

Language: German

Paperback (Published)

(July 2021)

ISBN: 9783832553340

6.65 x 9.45 inches

Price: $107.00

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Synopsis
Contributing Authors

Schraubenkompressoren sind in der Industrie weit verbreitet und dadurch fur einen grossen Teil des weltweiten elektrischen Energieumsatzes verantwortlich. Die in der Regel in Schraubenkompressoren verwendeten Rotoren mit konstanter Rotorsteigung stellen dabei stets einen Kompromiss zwischen den beiden primar vorherrschenden dissipativen Mechanismen, Spaltmassenstromen und Auslassdrosselung, dar. Rotoren mit nicht-konstanter Rotorsteigung bieten eine vielversprechende Moglichkeit zur energetischen Verbesserung von Schraubenkompressoren. In diesem Band wird das Potenzial nicht-konstanter Rotorsteigung auf Grundlage dimensionsloser Kennzahlen fur eine grosse Variationsbreite an Randbedingungen untersucht. Die Genauigkeit der dafur durchgefuhrten Kammermodellsimulationen hangt in grossem Masse von der Modellierung der maschineninternen Spaltmassenstrome ab. Mithilfe von CFD-Simulationen wird daher der Durchfluss durch die Stirn- und Gehausespalte untersucht und die Ergebnisse anhand eines Versuchsstandes experimentell validiert. Die Ergebnisse fliessen anschliessend in Form von Stromungsbeiwerten in die Simulation der Schraubenkompressoren ein. Die nicht-konstante Rotorsteigung wird anhand zweier geometrischer Konzepte untersucht und die optimalen Rotorgeometrien sowie die zugehorigen Gutegrade mit der optimalen Losung konstanter Rotorsteigung gegenubergestellt. Das theoretisch bestimmte Potenzial wird schliesslich anhand eines oleingespritzten Prototyps mit nicht-konstanter Rotorsteigung experimentell validiert.

By (author) Matthias Utri

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Potenzial von nicht-konstanter Rotorsteigung fur Schraubenkompressoren

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