Ein Beitrag zum Verstandnis des Anstreif- und Leckageverhaltens von Burstendichtungen bei Variation geometrischer Parameter

By (author) Manuel Hildebrandt

Book cover: Ein Beitrag zum Verstandnis des Anstreif- und Leckageverhaltens von Burstendichtungen bei Variation geometrischer Parameter

Extent: 162 pages

Publisher: Logos Verlag Berlin

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

Language: German

Paperback (Published)

(February 2021)

ISBN: 9783832552664

6.65 x 9.45 inches

Price: $79.00

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Im vorliegenden Band der Schriftenreihe wird die Fragestellung des Einflusses geometrischer Parameter der Burstendichtung auf ihr Anstreif- und Leckageverhalten gezielt experimentell untersucht. Anhand von Anstreifversuchen wird sowohl der reibungsbedingte Warmeeintrag in den Rotor, als auch die Gesamtreibleistung fur eine Vielzahl an Betriebsparametern bestimmt. Aus dem Verhaltnis des Warmeeintrags in den Rotor und der Gesamtreibleistung ergibt sich die Warmestromaufteilung zwischen Rotor und dem Borstenpaket und der Luft. Erkenntnisse uber das Leckageverhalten der Dichtungen, insbesondere uber das Ruckstell- bzw. Hystereseverhalten, kann durch einen Vergleich der Leckagemassenstrome vor, wahrend und nach dem Anstreifen analysiert werden. Zur Interpretation des dichtungsinternen Warmetransports- und ubergangs wird ein detailliertes aerothermisches numerisches Modell erstellt, welches auch die Stromung durch das Borstenpaket wahrend des Anstreifens mitberucksichtigt. Das Ziel dieser Modellierung ist zum einen, das Verstandnis uber die Aufteilung der Warmestrome wahrend des Anstreifens besser zu verstehen. Zum anderen wird hierdurch uberpruft, ob die oft genutzten Korrelationen zur Berechnung der Warmeubergangskoeffizienten an den Borsten auf Basis von Rohrbundel-Warmeubertragern angewendet werden konnen. Sowohl die umfangreiche, experimentell ermittelte Datenbasis als auch das validierte numerische Modell konnen zukunftig als eine wichtige Grundlage fur die Auslegung von Burstendichtungen fur thermische Turbomaschinen dienen.

  • By (author) Manuel Hildebrandt

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